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| - 1 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc 512mbit gddr2 sdram revision 1.5 october 2005 notice information in this document is provided in relation to samsung products, and is subject to change without notice. nothing in this document shall be construed as granting any license, express or implied, by estoppel or otherwise, to any intellectual property rights in samsung products or technology. all information in this document is provided on as "as is" basis without guarantee or warranty of any kind. 1. for updates or additional information about sa msung products, contact your nearest samsung office. 2. samsung products are not intended for use in life support, critical care, me dical, safety equipment, or similar applications where product failure could result in loss of life or personal or physical harm, or any military or defense application, or any governmen tal procurement to which special terms or provisions may apply. * samsung electronics reserves the right to change products or specification without notice.
- 2 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc revision history revision month year history 1.0 april 2005 - first released. 1.1 april 2005 - corrected typo. 1.2 may 2005 - changed speed bin organization. (k4n56163qf-gc2a/k4n56163qf-gc33/k4n56163qf-gc36) - 533 speed bin changed into 550 speed bin. - 600 speed bin is added. - 667 speed bin changed into 700 speed bin. 1.3 jun 2005 - corrected typo. - seperaed gddr2 device operation & timing. 1.4 september 2005 - corrected typo. 1.5 october 2005 - added gddr2-800 spec - revised the idd current values. - corrected typo. - merged device operation and timing diagram according to customer request - 3 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc ? 1.8v + 0.1v power supply for device operation ? 1.8v + 0.1v power supply for i/o interface ? 4 banks operation ? posted cas ? programmable cas letency : 3,4,5 ? programmable additive latency : 0, 1, 2, 3 and 4 ? write latency (wl) = read latency (rl) -1 ? burst legth : 4 and 8 (int erleave/nibble sequential) ? programmable sequential/ interleave burst mode ? bi-directional differential data-strobe (single-ended data-strobe is an optional feature) ? off-chip driver (ocd) impedance adjustment ? on die termination ? refresh and self refresh average refesh period 7.8us at lower then t case 85c, 3.9us at 85c < t case < 95 c ? lead free 84 ball fbga(rohs compliant) 8m x 16bit x 4 banks grap hic ddr2 synchronous dram with differential data strobe * k4n51163qc-zc2a/36 can fully cover previs ous k4n51163qf-zc30/37(667mbps/533mbps) product. * k4n51163qc-gc is the leaded package part number. part no. max freq. max data rate interface package k4n51163qc-zc 2 5 400mhz 800mbps/pin sstl 84 ball fbga k4n51163qc-zc 2 a 350mhz 700mbps/pin k4n51163qc-zc33 300mhz 600mbps/pin k4n51163qc-zc36 275mhz 550mbps/pin the 512mb gddr2 sdram chip is organized as 8mbit x 16 i/o x 4banks banks device. this synchronous device achieve high speed graphic double-data-rate transfer rates of up to 800mb/sec/pin fo r general applications. the chip is designed to comply with th e follow- ing key gddr2 sdram features such as posted cas with additive la tency, write latency = read latency - 1, off-chip driver(ocd) impedance adjustment and on die termination. all of the control and address inputs are syn chronized with a pair of externally s upplied differential clocks. inputs are latched at the cross point of differential clocks (ck rising and ck falling). all i/os are synchronized with a pair of bidirectional strobes (dqs and dqs ) in a source synchronous fashion. a thirteen bi t address bus is used to convey row, column, and bank address information in a ras /cas multiplexing style. for example, 512mb(x16) device receive 13/10/2 addressing. the 512mb gddr2 devices operate with a single 1.8v 0.1v power supply and 1.8v 0.1v vddq. the 512mb gddr2 devices are avail- able in 84ball fbgas(x16). note : the functionality described and the timing specifications included in this dat a sheet are for the dll enabled mode of op eration. for 8m x 16bit x 4 bank gddr2 sdram 1.0 features 2.0 ordering information 3.0 general description - 4 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc normal package (top view) a b c d e f g h j k l vdd nc vss ldq6 vssq ldm vddq vddq vddq vssq vssq ldqs ldqs ldq7 ldq0 vddq ldq2 vssq ldq5 vssdl vdd ck ras ck cas cs a2 a6 a4 a11 a8 nc nc nc a12 a9 a7 a5 a0 vdd a10 vss vddq vssq ldq1 ldq3 ldq4 vddl a1 a3 ba1 vref vss cke we ba0 1 2 3 7 8 9 vdd vss vdd nc vss udq6 vssq udm vddq vddq vssq udq1 udq3 udq4 vddq vddq vssq vssq udqs udqs udq7 udq0 vddq udq2 vssq udq5 nc odt m n p r note : vddl and vssdl are power and ground for the dll. lt is recommended that they are isolated on the device from vdd, vddq, vss, and vssq. + + + + + + + + + + + 123456789 a b c d e f g h j k l + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + m n p r + + + + + + : populated ball + : depopulated ball top view ball locations (see the balls through the package) 4.0 pin configuration - 5 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc unit : mm 13.00 0.10 11.20 0.80 1.60 11.00 0.10 1 2 3 4 5 6 7 8 9 6.40 0.80 1.60 b c d e f g h k k m a 5.60 (6.15) (0.90) (1.80) 3.20 84- ? 0.45 0.05 ? 0.2 mab 13.00 0.10 11.00 0.10 #a1 0.50 0.05 0.10max 0.35 0.05 max.1.20 j l n r # a1 index mark (optional) 5.0 package dimensions (84 ball fbga) - 6 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc symbol type function ck, ck input clock: ck and ck are differential clock inputs. cmd, add in puts are sampled on the crossing of the posi- tive edge of ck and negative edge of ck . output (read) data is referenced to the crossings of ck and ck (both directions of crossing). cke input clock enable: cke high activates, and cke low deactivates, internal clock signals and device input buffers and output drivers. taking cke low provi des precharge power-down and self refresh operation (all banks idle), or active power-down (row active in any bank). cke is synchronous for power down entry and exit, and for self refresh entry. cke is asynchrono us for self refresh exit. cke must be maintained high throughout read and write accesses. input buffers, excluding ck, ck and cke are disabled during power- down. input buffers, excluding cke, are disabled during self refresh. cs input chip select: all commands are masked when cs is registered high. cs provides for external bank selec- tion on systems with multiple banks. cs is considered part of the command code. odt input on die termination: odt (registered high) enables termination resistance internal to the gddr2 sdram. when enabled, odt is only applied to each dq, udqs/udqs , ldqs/ldqs , udm, and ldm signal for x16 configurations. the odt pin will be igno red if the extended mode register (emrs) is pro- grammed to disable odt. ras , cas , we input command inputs: ras , cas and we (along with cs ) define the command being entered. (l)udm input input data mask: dm is an input mask signal for write data. input data is masked when dm is sampled high coincident with that input data during a wr ite access. dm is sampled on both edges of dqs. although dm pins are input only, the dm loading matches the dq and dqs loading. ba0 - ba1 input bank address inputs: ba0 and ba1 define to which bank an ac tove, read, write or precharge command is being applied. ba0 also determines if the mode regist er or extended mode register is to be accessed dur- ing a mrs or emrs cycle. a0 - a12 input address inputs: provided the row address for active comm ands and the column address and auto pre- charge bit for read/write commands to select one loca tion out of the memory array in the respective bank. a10 is sampled during a precharge command to determine whether the precharge applies to one bank (a10 low) or all banks (a10 high). if only one bank is to be precharge d, the bank is selected by ba0, ba1. the address inputs also provide the op-code during mode register set commands. dq input/ output data input/ output: bi-directional data bus. ldqs,(ldqs ) udqs,(udqs ) input/ output data strobe: output with read data, input wi th write data. edge-aligned with read data, centered in write data. ldqs corresponds to the dat a on dq0-dq7; udqs corresponds to the data on dq8-dq15. the data strobes ldqs and udqs may be used in single ended mode or paired with optional complementary sig- nals ldqs and udqs to provide differential pair signaling to the system during both reads and writes. an emrs(1) control bit enables or disables all complementary data strobe signals. nc/rfu no connect: no internal electrical connection is present. v ddq supply dq power supply: 1.8v 0.1v v ssq supply dq ground v ddl supply dll power supply: 1.8v 0.1v v ssl supply dll ground v dd supply power supply: 1.8v 0.1v v ss supply ground v ref supply reference voltage 6.0 input/output func tional description - 7 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc note : 1. stresses greater than those listed under ?absolute maximum ra tings? may cause permanent damage to the device. this is a stre ss rating only and functional operation of the device at these or any other conditi ons above those indicated in the operational sections of this s pecification is not implied. exposure to absolute maximum ra ting conditions for extended periods may affect reliability. 2. storage temperature is the case surface temperature on the center/top side of the dram. for the measurement conditions, ple ase refer to jesd51- 2 standard. symbol parameter rating units notes vdd voltage on vdd pin relative to vss - 1.0 v ~ 2.3 v v 1 vddq voltage on vddq pin relative to vss - 0.5 v ~ 2.3 v v 1 vddl voltage on vddl pin relative to vss - 0.5 v ~ 2.3 v v 1 v in, v out voltage on any pin relative to vss - 0.5 v ~ 2.3 v v 1 t stg storage temperature -55 to +100 c 1, 2 note : there is no specific device vdd s upply voltage requirement for sstl-1.8 compli ance. however under all conditions vddq mu st be less than or equal to vdd. 1. the value of vref may be selected by the user to provide optim um noise margin in the system. typically the value of vref is expected to be about 0.5 x vddq of the transmitting device and vref is expected to track variations in vddq. 2. peak to peak ac noise on vref may not exceed +/-2% vref(dc). 3. vtt of transmitting device must track vref of receiving device. 4. ac parameters are measured with vdd, vddq and vdddl tied together. symbol parameter rating units notes min. typ. max. vdd supply voltage 1.7 1.8 1.9 v vddl supply voltage for dll 1.7 1.8 1.9 v 4 vddq supply voltage for output 1.7 1.8 1.9 v 4 vref input reference voltage 0.49*vddq 0.50*vddq 0.51*vddq mv 1,2 vtt termination voltage vref-0.04 vref vref+0.04 v 3 8.0 ac & dc oper ating conditions 8.1 recommended dc operati ng conditions (sstl - 1.8) note : 1. operating temperature is the case surface temperature on t he center/top side of the dram. for the measurement conditions, pl ease refer to jesd51.2 standard. 2. at 0 - 85 c, operation temperature range are the temperature which all dram specification will be supported. 3. at 85 - 95 c operation temperature range, doubling refresh commands in frequenc y to a 32ms period ( trefi=3.9 us ) is required, and to ent er to self refresh mode at this temperature range, an emrs co mmand is required to change internal refresh rate. symbol parameter rating units note toper operating temperature 0 to 95 c 1, 2, 3 8.2 operating temperature condition input dc logic level input ac logic level symbol parameter min. max. units note v ih (dc) dc input logic high v ref + 0.125 v ddq + 0.3 v v il (dc) dc input logic low v ddq - 0.3 v ref - 0.125 v symbol parameter min. max. units note v ih (ac) ac input logic high v ref + 0.250 -v v il (ac) ac input logic low - v ref - 0.250 v 8.3 input dc & ac logic level 7.0 absolute maximum dc ratings - 8 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc note : 1. input waveform timing is referenced to the input signal crossing through the v ih/il (ac) level applied to the device under test. 2. the input signal minimum slew rate is to be maintained over the range from v ref to v ih (ac) min for rising edges and the range from v ref to v il (ac) max for falling edges as shown in the below figure. 3. ac timings are referenced with input waveforms switching from v il (ac) to v ih (ac) on the positive transitions and v ih (ac) to v il (ac) on the negative transitions. symbol condition value units note v ref input reference voltage 0.5 * v ddq v1 v swing(max) input signal maximum peak to peak swing 1.0 v 1 slew input signal minimum slew rate 1.0 v/ns 2, 3 v ddq v ih (ac) min v ih (dc) min v ref v il (dc) max v il (ac) max v ss < ac input test signal waveform > v swing(max) delta tr delta tf v ref - v il (ac) max delta tf falling slew = rising slew = v ih (ac) min - v ref delta tr v ddq crossing point v ssq v tr v cp v id v ix or v ox note : 1. vid(ac) specifies the input differential voltage |vtr -vcp | required for switching, where vt r is the true input signal (suc h as ck, dqs, ldqs or udqs) and vcp is the complementary input signal (such as ck , dqs , ldqs or udqs ). the minimum value is equal to vih(ac) - vil(ac). 2. the typical value of vix(ac) is expected to be about 0.5 * vddq of the transmitting device and vix(ac) is expected to track variations in vddq . vix(ac) indicates the voltage at which differential input signals must cross. symbol parameter min. max. units note v id (ac) ac differential input voltage 0.5 v ddq + 0.6 v 1 v ix (ac) ac differential cross point voltage 0.5 * v ddq - 0.175 0.5 * v ddq + 0.175 v 2 8.5 differential i nput ac logic level note : 1. the typical value of vox(ac) is expected to be about 0.5 * vddq of the transmitting device a nd vox(ac) is expected to track variations in vddq . vox(ac) indicates the voltage at which differential output signals must cross. symbol parameter min. max. units note v ox (ac) ac differential cross point voltage 0.5 * v ddq - 0.125 0.5 * v ddq + 0.125 v 1 8.6 differential ac output parameters < differential signal levels > 8.4 ac input test conditions - 9 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc notes: 1. absolute specifications (0c t case +95c; vdd = +1.8v 0.1v, vddq = +1.8v 0.1v) 2. impedance measurement condition for output source dc current: vddq = 1.7v; vout = 1420mv; (vout-vddq)/ioh must be less than 2 3.4 ohms for values of vout between vddq and vddq-280mv . impedance measurement condition for output sink dc current: vddq = 1.7v; vout = 280 mv; vout/iol must be less than 23.4 ohms for values of vout between 0v and 280mv. 3. mismatch is absolute value between pull-up and pull-dn, both are measured at same temperature and voltage. 4. slew rate measured from v il (ac) to v ih (ac). 5. the absolute value of the slew rate as measured from dc to dc is equal to or greater than the slew rate as measured from ac to ac. this is guaran- teed by design and characterization. 6. this represents the step size when the ocd is near 18 ohms at nominal conditions across all process and represents only the dram uncertainty. output slew rate load : 7. dram output slew rate specification applies to 533mb /sec/pin, 667mb/sec/pin, 800mb/sec/pin, 900mbps/sec/pin and 1000mbps/sec/pin speed bins. 8. timing skew due to dram output slew rate mis-match between dqs / dqs and associated dqs is included in tdqsq and tqhs specification. 25 ohms vtt output (vout) reference point description parameter min nom max unit note output impedance normal 18ohms see full strength default driver characteristics ohms 1,2 output impedance step size for ocd calibration 0 1.5 ohms 6 pull-up and pull-down mismatch 0 4 ohms 1,2,3 output slew rate sout 1.5 5 v/ns 1,4,5,6,7,8 (recommended operating conditions unless otherwise noted, 0 c tc 85 c ) note : 1. measured with outputs open and odt off parameter symbol test condition version unit -25 -2a -33 -36 operating current (one bank active) icc1 burst length=4 trc trc(min). iol=0ma, tcc= tcc(min). dq,dm,dqs inputs changing twice per clock cycle. address and control inputs changing once per clock cycle tbd 140 tbd 130 ma precharge standby current in power-down mode icc2p cke vil(max), tcc= tcc(min) tbd 10 ma precharge standby current in non power-down mode icc2n cke vih(min), cs vih(min),tcc= tcc(min) address and control inputs changing once per clock cycle tbd 40 tbd 35 ma active standby current power-down mode icc3p cke vil(max), tcc= tcc(min) fast pdn exit mrs(12) = 0ma tbd 30 tbd 25 ma slow pdn exit mrs(12) = 1ma tbd 12 tbd 12 active standby current in in non power-down mode icc3n cke vih(min), cs vih(min), tcc= tcc(min) dq,dm,dqs inputs changing twice per clock cycle. address and control inputs changing once per clock cycle tbd 60 tbd 55 ma operating current ( burst mode) icc4 iol=0ma ,tcc= tcc(min), page burst, all banks activate d. dq,dm,dqs inputs changing twice per clock cycle. addr ess and control inputs changing once per clock. tbd 200 tbd 170 ma refresh current icc5 trc trfc tbd 160 tbd 165 ma self refresh current icc6 cke 0.2v tbd 8 tbd 8 ma operating current (4bank interleaving) icc7 burst length=4 trc trc(min). iol=0ma, tcc= tcc(min). dq,dm,dqs inputs changing twice per clock cycle. address and control inputs changing once per clock cycle tbd 350 tbd 320 ma 8.8 dc characteristics 8.7 ocd default characteristics - 10 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc parameter symbol - 36 -33 - 2a - 25 units min max min max min max min max input capacitance, ck and ck cck 1.0 2.0 1.0 2.0 1.0 2.0 1.0 2.0 pf input capacitance delta, ck and ck cdck x 0.25 x 0.25 x 0.25 x 0.25 pf input capacitance, all other input-only pins ci 1.0 2.0 1.0 2.0 1.0 2.0 1.0 1.75 pf input capacitance delta, all other input-only pins cdi x 0.25 x 0.25 x 0.25 x 0.25 pf input/output capacitance, dq, dm, dqs, dqs cio 2.5 4.0 2.5 4.0 2.5 3.5 2.5 3.5 pf input/output capacitance delta, dq, dm, dqs, dqs cdio x 0.5 x 0.5 x 0.5 x 0.5 pf 9.0 electrical characteristics & ac timing for - 25/2a/33/36 (0 c < t case < 95 c; v ddq = 1.8v + 0.1v; v dd = 1.8v + 0.1v) speed -25 - 2a -33 - 36 units bin (cl-trcd-trp) 5-5-5 5-5-5 5-5-5 4-4-4 parameter min min min min cas latency 5 5 5 4 tck tck 2.5 2.86 3.3 3.6 ns trcd 5 5 5 4 tck trp 5 5 5 4 tck trc 21 18 18 15 tck tras 16 13 13 11 tck 9.1 refresh parameters parameter symbol 512mb units refresh to active/r efresh command time trfc 105 ns average periodic refresh interval trefi 0 c t case 85 c 7.8 s 85 c < t case 95 c 3.9 s 9.2 speed bins and cl, trcd, trp, trc and tras 8.9 input/output capacitance - 11 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc (refer to notes for informations related to this table at the bottom) parameter symbol - 25 - 2a - 33 - 36 units notes min max min max min max min max dq output access time from ck/ck tac -400 +400 -450 +450 -470 +470 -500 +500 ps dqs output access time from ck/ck tdqsck -350 +350 -400 +400 -420 +420 -450 +450 ps ck high-level width tch 0.45 0.55 0.45 0.55 0.45 0.55 0.45 0.55 tck ck low-level width tcl 0.45 0.55 0.45 0.55 0.45 0.55 0.45 0.55 tck ck half period thp min(tcl, tch) x min (tcl, tch) x min (tcl, tch) x min (tcl, tch) x ps 20,21 clock cycle time, cl= x tck 2500 8000 2.86 8.0 3.3 8.0 3.6 8.0 ns 24 dq and dm input hold time tdh 125 x 175 x 195 x 225 x ps 15,16, 17 dq and dm input setup time tds 50 x 50 x 70 x 100 x ps 15,16, 17 control & address input pulse width for each input tipw 0.6 x 0.6x0.6x0.6 x tck dq and dm input pulse width for each input tdipw 0.35 x 0.35 x 0.35 x 0.35 x tck data-out high-impedance time from ck/ ck thz x tac max x tac max x tac max x tac max ps dqs low-impedance time from ck/ck tlz (dqs) tac min tac max tac min tac max tac min tac max tac min tac max ps 27 dq low-impedance time from ck/ck tlz(dq) 2*tac min tac max 2*tac min tac max 2*tac min tac max 2* tac min tac max ps 27 dqs-dq skew for dqs and associated dq signals tdqsq x200 x 310 x 320 x 340 ps 22 dq hold skew factor tqhs x 300 x 410 x 420 x 440 ps 21 dq/dqs output hold time from dqs tqh thp - tqhs x thp - tqhs x thp - tqhs x thp - tqhs x ps write command to first dqs latching transition tdqss -0.25 0.25 wl -0.25 wl +0.25 wl -0.25 wl +0.25 wl -0.25 wl +0.25 tck dqs input high pulse width tdqsh 0.35 x 0.35 x 0.35 x 0.35 x tck dqs input low pulse width tdqsl 0.35 x 0.35 x 0.35 x 0.35 x tck dqs falling edge to ck setup time tdss 0.2 x 0.2 x 0.2 x 0.2 x tck dqs falling edge hold time from ck tdsh 0.2 x 0.2 x 0.2 x 0.2 x tck mode register set command cycle time tmrd 2 x 2 x 2 x 2 x tck write postamble twpst 0.4 0.6 0.4 0.6 0.4 0.6 0.4 0.6 tck 19 write preamble twpre 0.35 x 0.35 x 0.35 x 0.35 x tck address and control input hold time tih 250 x 325 x 345 x375 x ps 14,16, 18 address and control input setup time tis 175 x 200 x 220 x250 x ps 14,16, 18 read preamble trpre 0.9 1.1 0.9 1.1 0.9 1.1 0.9 1.1 tck 28 read postamble trpst 0.4 0.6 0.4 0.6 0.4 0.6 0.4 0.6 tck 28 active to active command period for 1kb page size products trrd 7.5 x 7.5 x 7.5 x7.5 x ns 12 active to active command period for 2kb page size products trrd 10 x 10 x 10 x10 x ns 12 9.3 timing parameters by speed grade - 12 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc note : general notes, which may apply for all ac parameters 1. slew rate measurement levels a. output slew rate for falling and rising edges is measur ed between vtt - 250 mv and vtt + 250 mv for single ended signals. fo r differential signals (e.g. dqs - dqs ) output slew rate is measured between dqs - dqs = -500 mv and dqs - dqs = +500mv. output slew rate is guaranteed by design, but is not necessa rily tested on each device. b. input slew rate for single ended signals is measured from dc-level to ac-level: from vref - 125 mv to vref + 250 mv for risi ng edges and from vref + 125 mv and vref - 250 mv for falling edges. for differential signals (e.g. ck - ck ) slew rate for rising edges is measured from ck - ck = -250 mv to ck - ck = +500 mv (250mv to -500 mv for falling egdes). c. vid is the magnitude of the difference between the input voltage on ck and the input voltage on ck , or between dqs and dqs for differential strobe. parameter symbol - 25 - 2a -33 - 36 units notes min max min max min max min max cas to cas command delay tccd 2 2 2 2 tck write recovery time twr 6 x 5 x 5 x4 x tck auto precharge write recovery + pre- charge time tdal wr+trp x twr +trp x twr +trp x twr +trp x tck 23 internal write to read command delay twtr 3 3 x3 x2 x tck internal read to precharge command delay trtp 3 3 3 2 tck 11 exit self refresh to a non-read com- mand txsnr trfc + 10 trfc + 10 trfc + 10 trfc + 10 ns exit self refresh to a read command txsrd 200 200 200 200 tck exit precharge power down to any non-read command txp 2 x 2 x 2 x 2 x tck exit active power down to read com- mand txard 2 x 2 x 2 x 2 x tck 9 exit active power down to read com- mand (slow exit, lower power) txards 8 - al 6 - al 6 - al 6 - al tck 9, 10 cke minimum pulse width (high and low pulse width) tcke 3 3 3 3tck odt turn-on delay taond22222222tck odt turn-on taon tac(min) tac(max )+0.7 tac (min) tac (max)+0 .7 tac (min) tac (max)+0 .7 tac (min) tac (max)+1 ns 13, 25 odt turn-on(power-down mode) taonpd tac(min) +2 2tck+ta c(max)+ 1 tac (min)+2 2tck+ tac(max )+1 tac (min)+2 2tck+ tac(max )+1 tac (min)+2 2tck+ta c(max)+ 1 ns odt turn-off delay taofd 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 tck odt turn-off taof tac(min) tac(max )+ 0.6 tac (min) tac (max)+ 0.6 tac (min) tac (max)+ 0.6 tac (min) tac (max)+ 0.6 ns 26 odt turn-off (power-down mode) taofpd tac(min) +2 2.5tck+ tac(max )+1 tac(min) +2 2.5tck+t ac(max) +1 tac(min) +2 2.5tck+t ac(max) +1 tac(min) +2 2.5tck+ tac(max )+1 ns odt to power down entry latencytanpd3333tck odt power down exit latency taxpd 8888tck ocd drive mode output delay toit 0 12 0 12 0 12 0 12 ns minimum time clocks remains on after cke asynchronously drops low tdelay tis+tck +tih tis+tck +tih tis+tck +tih tis+tck +tih ns 24 - 13 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc 2. gddr2 sdram ac timing reference load following figure represents the timing refe rence load used in defining the relevant ti ming parameters of the part. it is not in tended to be either a precise representation of the typical system environment or a depiction of the actual load presented by a production tester. system desi gners will use ibis or other simulation tools to correlate the timing reference load to a system environment. manufacturers will correlate to their pr oduction test conditions (gen- erally a coaxial transmission line te rminated at the tester electronics). the output timing reference voltage level for single ended signals is the crosspoint with vtt. the output timing reference volt age level for differential sig- nals is the crosspoint of the true (e.g. dq s) and the complement (e.g. dqs) signal. 3. gddr2 sdram output slew rate test load output slew rate is characterized under the test conditions as shown in the following figure. 4. differential data strobe gddr2 sdram pin timings are specified fo r either single ended mode or differential mode depending on the setting of the emrs ?e nable dqs? mode bit; timing advantages of differential mode are realized in system design. the method by which the gddr2 sdram pin timings are measured is mode dependent. in single ended mode, timing relationshi ps are measured relative to the rising or falling edges of dqs crossing at v ref. in differential mode, these timing relationships are meas ured relative to the crosspoint of dqs and its complement, dqs . this distinction in timing methods is guaranteed by design and characterization. note that when differential data strobe mode is disabled via the emrs, the complementary pin, dqs , must be tied externally to vss through a 20 ohm to 10 k ohm resisor to insure proper operation. vddq dut dq dqs dqs output v tt = v ddq /2 25 ? timing reference point - 14 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc 5. ac timings are for li near signal transitions. 6. these parameters guarantee device behavior, but they are not necessarily tested on each device. they may be guaranteed by device design or tester correlation. 7. all voltages are referenced to vss. 8. tests for ac timing, idd, and electrical (ac and dc) charac teristics, may be conducted at nom inal reference/supply voltage l evels, but the related specifications and device operation are guar anteed for the full voltage range specified. : specific notes for dedicated ac parameters 9. user can choose which active power down exit timing to use via mrs(bit 12). txard is expected to be used for fast active pow er down exit timing. txards is expected to be used for slow active power down exit timing. 10. al = additive latency 11. this is a minimum requirement. minimum read to precharge ti ming is al + bl/2 providing the trtp and tras(min) have been sat isfied. 12. a minimum of two clocks (2 * tck) is required irrespective of operating frequency 13. timings are guaranteed with command/address input slew rate of 1.0 v/ns. 14. these parameters guarantee device behavior, but they ar e not necessarily tested on each device. they may be guaranteed by device design or tester correlation. 15. timings are guaranteed with data, mask, and (dqs in singled ended mode) input slew rate of 1.0 v/ns. 16. timings are guaranteed with ck/ck differential slew rate of 2.0 v/ns. timings are guaranteed fo r dqs signals with a differential slew rate of 2.0 v/ns in differential strobe mode and a slew rate of 1v/ns in single ended mode. 17. tds and tdh (data setup and hold) derating 1) input waveform timing is referenced fr om the input signal crossing at the v ih (ac) level for a rising signal and v il (ac) for a falling signal applied to the device under test. 2) input waveform timing is referenced from the input signal crossing at the v ih (dc) level for a rising signal and v il (dc) for a falling signal applied to the device under test. for all input signals the total tds (setup time) and tdh(hold ti me) required is calculated by adding the datasheet tds(base) an d tdh(base) value to the delta tds and delta tdh derating value respectively. exam ple : tds (total setup time) = tds(base) + delta tds. ? tds, ? tdh derating values of gddr2-550 (all units in ?ps?, note 1 applies to entire table) dqs,dqs differential slew rate 4.0 v/ns 3.0 v/ns 2.0 v/ns 1.8 v/ns 1.6 v/ns 1.4v/ns 1.2v/ns 1.0v/ns 0.8v/ns ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh dq slew rate v/ns 2.0125451254512545------------ 1.58321832183219533---------- 1.000000012122424-------- 0.9---11-14-11-141-213102522------ 0.8 - - - - -25 -31 -13 -19 -1 -7 11 5 23 17 - - - - 0.7-------31-42-19-30-7-185-6176-- 0.6---------43-59-31-47-19-35-7-235-11 0.5-----------74-89-62-77-50-65-38-53 0.4-------------127-140-115-128-103-116 ? tds, ? tdh derating values for gddr2-600/700/800 (all units in ?ps?, note 1 applies to entire table) dqs,dqs differential slew rate 4.0 v/ns 3.0 v/ns 2.0 v/ns 1.8 v/ns 1.6 v/ns 1.4v/ns 1.2v/ns 1.0v/ns 0.8v/ns ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh ? tds ? tdh dq slew rate v/ns 2.0 100 45 100 45 100 45 - - - - - - - - - - - - 1.56721672167217933 - - - - - - - - - - 1.000000012122424- - - - - - - - 0.9 - - -5 -14 -5 -14 7 -2 19 10 31 22 - - - - - - 0.8 - - - - -13 -31 -1 -19 11 -7 23 5 35 17 - - - - 0.7-------10-422-3014-1826-6386-- 0.6---------10-592-4714-3526-2338-11 0.5-----------24-89-12-770-6512-53 0.4-------------52-140-40-128-28-116 - 15 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc 18. tis and tih (input setup and hold) derating 1) input waveform timing is referenced from the input signal crossing at the v ih (ac) level for a rising signal and v il (ac) for a falling signal applied to the device under test. 2) input waveform timing is referenced from the input signal crossing at the v ih (dc) level for a rising signal and v il (dc) for a falling signal applied to the device under test. tis, tih derating values for gddr2 550 units notes ck,ck differential slew rate 2.0 v/ns 1.5 v/ns 1.0 v/ns ? tis ? tih ? tis ? tih ? tis ? tih command /adress slew rate(v/ns) 4.0 +187 +94 +217 +124 +247 +154 ps 1 3.5 +179 +89 +209 +119 +239 +149 ps 1 3.0 +167 +83 +197 +113 +227 +143 ps 1 2.5 +150 +75 +180 +105 +210 +135 ps 1 2.0 +125 +45 +155 +75 +185 +105 ps 1 1.5 +83 +21 +113 +51 +143 +81 ps 1 1.0 0 0 +30 +30 +60 +60 ps 1 0.9 -11 -14 +19 +16 +49 +46 ps 1 0.8 -25 -31 +5 -1 +35 +29 ps 1 0.7 -43 -54 -13 -24 +17 +6 ps 1 0.6 -67 -83 -37 -53 -7 -23 ps 1 0.5 -110 -125 -80 -95 -50 -65 ps 1 0.4 -175 -188 -145 -158 -115 -128 ps 1 0.3 -285 -292 -255 -262 -225 -232 ps 1 0.25 -350 -375 -320 -345 -290 -315 ps 1 0.2 -525 -500 -495 -470 -465 -440 ps 1 0.15 -800 -708 -770 -678 -740 -648 ps 1 ? tis and ? tih derating values for gddr2-600, gddr2-700, gddr2-800 units notes ck,ck differential slew rate 2.0 v/ns 1.5 v/ns 1.0 v/ns ? tis ? tih ? tis ? tih ? tis ? tih command /adress slew rate(v/ns) 4.0 +150 +94 +180 +124 +210 +154 ps 1 3.5 +143 +89 +173 +119 +203 +149 ps 1 3.0 +133 +83 +163 +113 +193 +143 ps 1 2.5 +120 +75 +150 +105 +180 +135 ps 1 2.0 +100 +45 +130 +75 +160 +105 ps 1 1.5 +67 +21 +97 +51 +127 +81 ps 1 1.0 0 0 +30 +30 +60 +60 ps 1 0.9 -5 -14 +25 +16 +55 +46 ps 1 0.8 -13 -31 +17 -1 +47 29 ps 1 0.7 -22 -54 +8 -24 +38 +6 ps 1 0.6 -34 -83 -4 -53 +26 -23 ps 1 0.5 -60 -125 -30 -95 0 -65 ps 1 0.4 -100 -188 -70 -158 -40 -128 ps 1 0.3 -168 -292 -138 -262 -108 -232 ps 1 0.25 -200 -375 -170 -345 -140 -315 ps 1 0.2 -325 -500 -295 -470 -265 -440 ps 1 0.15 -517 -708 -487 -678 -457 -648 ps 1 0.1 -1000 -1125 -970 -1095 -940 -1065 - 16 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc 19. the maximum limit for this parameter is not a device limit. the device will operate with a greater value for this parameter , but system performance (bus turnaround) will degrade accordingly. 20. min ( tcl, tch) refers to the smaller of the actual clock low time and the actual clock high time as provided to the device (i.e. this value can be greater than the minimum specification limits for tcl and tch). for exam ple, tcl and tch are = 50% of the period, less the half period jitter ( tjit(hp)) of the clock source, and less the half period jitter due to cr osstalk ( tjit(crosstalk)) into the clock traces. 21. tqh = thp ? tqhs, where: thp = minimum half clock period for any given cycle and is defined by clock high or clock low ( tch, tcl). tqhs accounts for: 1) the pulse duration distortion of on-chip clock circuits; and 2) the worst case push-out of dqs on one transition followed by the worst case pull-in of dq on the next transition, both of wh ich are, separately, due to data pin skew and output pattern effects, and p-c hannel to n-channel variation of the output drivers. 22. tdqsq: consists of data pin skew and output pattern effect s, and p-channel to n-channel variation of the output drivers as well as output slew rate mismatch between dqs / dqs and associated dq in any given cycle. 23. tdal = (nwr) + ( trp/tck) : for each of the terms above, if not already an integer, round to the next highest integer. tck re fers to the application clock period. nwr refers to the twr parameter stored in the mrs. example: for gddr533 at t ck = 3.75 ns with twr programmed to 4 clocks. tdal = 4 + (15 ns / 3.75 ns) clocks =4 +(4)clocks=8cloc ks. 24. the clock frequency is allowed to change during self?refresh mode or precharge powe r-down mode. in case of clock frequency change during pre- charge power-down, a specific procedure is r equired as described in gddr2 device operation 25. odt turn on time min is when the device leav es high impedance and odt resistance begins to turn on. odt turn on time max is when the odt resistance is fully on. both are measured from taond. 26. odt turn off time min is when the device starts to turn off odt resistance. odt turn off time max is when the bus is in high impedance. both are measured from taofd. 27. thz and tlz transitions occur in the same access time as valid data transitions. these parame ters are referenced to a speci fic voltage level which specifies when the device output is no longer driving (thz), or begins driving (tlz) . following figure shows a method to calcu late the point when device is no longer driving (thz), or begins driving (tlz) by measuring the signal at two different voltages. the actual voltag e measurement points are not critical as long as the calculation is consistent. 28. trpst end point and trpre begin point are not referenced to a s pecific voltage level but specify when the device output is no longer driving (trpst), or begins driving (trpre). following figure shows a method to calculate these points when the device is no longer driving (trps t), or begins driving (trpre) by measuring the signal at two different voltages. the ac tual voltage measurement points are not critical as long as th e calculation is consis- tent. these notes are referenced to the ?timing parameters by speed grade? tables for gddr2-550/600/700 and gddr2-800. thz trpst end point t1 t2 voh + x mv voh + 2x mv vol + 2x mv vol + x mv tlz trpre begin point t2 t1 vtt + 2x mv vtt + x mv vtt - x mv vtt - 2x mv tlz,trpre begin point = 2*t1-t2 thz,trpst end point = 2*t1-t2 - 17 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc 29. input waveform timing with differential data strobe enabled mr [bit10]=0, is referenced from the input signal crossing at th e v ih(ac) level to the differ- ential data strobe crosspoint for a rising signal, and from the input signal crossing at the v il(ac) level to the differential data strobe crosspoint for a falling signal applied to the device under test. 30. input waveform timing with differential data strobe enabled mr [bit10]=0, is referenced from the input signal crossing at th e v ih(dc) level to the differ- ential data strobe crosspoint for a rising signal and v il(dc) to the differential data strobe crosspoint for a falling signal applie d to the device under test. differential input waveform timing tds v ddq v ih (ac) min v ih (dc) min v ref v il (dc) max v il (ac) max v ss dqs dqs tdh tds tdh 3 3. twtr is at lease two clocks (2 * tck) independent of operation frequency. 34. input waveform timing with single-ended data strobe enabled mr[b it10] = 1, is referenced from the input signal crossing at the vih(ac) level to the sin- gle-ended data strobe crossing vih/l(dc) at the start of its tr ansition for a rising signal, and from the input signal crossing at the vil(ac) level to the single-ended data strobe crossing vih/l(dc) at the start of its transition for a falling signal applied to the device under tes t. the dqs signal must be monotonic between vil(dc)max and vih(dc)min. 35. input waveform timing with single-ended data strobe enabled mr[b it10] = 1, is referenced from the input signal crossing at the vih(dc) level to the sin- gle-ended data strobe crossing vih/l(ac) at the end of its transit ion for a rising signal, and fr om the input signal crossing a t the vil(dc) level to the sin- gle-ended data strobe crossing vih/l(ac) at the end of its trans ition for a falling signal appli ed to the device under test. t he dqs signal must be monotonic between vil(dc)max and vih(dc)min. 36. tckemin of 3 clocks means cke must be registered on three c onsecutive positive clock edges. cke must remain at the valid in put level the entire time it takes to achieve the 3 clocks of registeration. thus, after any cke transition, cke may not transitioin from its valid level during the time period of tis + 2*tck + tih. 31. input waveform timing is referenced from the input signal cr ossing at the vih(ac) level for a rising signal and vil(ac) for a falling signal applied to the device under test. 32. input waveform timing is referenced from the input signal crossing at the vil(dc) level fo r a rising signal and vih(dc) for a falling signal applied to the device under test. tis v ddq v ih (ac) min v ih (dc) min v ref v il (dc) max v il (ac) max v ss ck ck tih tis tih - 18 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc device operation & timing diagram - 19 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc functional description simplified state diagram self idle setting emrs bank precharging power writing act rda read srf ref ckel (e)mrs ckeh ckeh ckel write automatic sequence command sequence rda wra read pr, pra pr refreshing refreshing down power down active with rda reading with wra active precharge reading writing pr(a) = precharge (all) (e)mrs = (extended) mode register set srf = enter self refresh ref = refresh ckel = cke low, enter power down ckeh = cke high, exit powe r down, exit self refresh act = activate wr(a) = write (with autoprecharge) rd(a) = read (with autoprecharge) all banks precharged activating ckeh read write ckel mrs ckel sequence initialization ocd calibration ckel ckel ckel autoprecharge autoprecharge pr, pra pr, pra write wra note : use caution with this diagram. it is indented to provi de a floorplan of the possible stat e transitions and the commands to control them, not all details. in particular situations involving more than one bank, enabling/disabling on-die termination, power down entry/ exit - among other things - ar e not captured in full detail. - 20 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc gddr2 sdrams must be powered up and initialized in a predefin ed manner. operational procedures other than those specified may result in undefined operation. power-up and initia lization sequence the following sequence is required for power up and initialization. 1. apply power and attempt to maintain cke below 0.2*vddq and odt *1 at a low state (all other inputs may be undefined.) the power voltage ramps are without any slope reversal, ramp time must be no greater than 20ms; and during the ramp, vdd>vddl>vddq and vdd-vddq<0.3 volts. -vdd *2 , vddl *2 and vddq are driven from a single power converter output, and - vtt is limited to 0.95 v max, and - vref tracks vddq/2. or - apply vdd *2 before or at the same time as vddl. - apply vddl *2 before or at the same time as vddq. - apply vddq before or at the same time as vtt & v ref . at least one of these two sets of conditions must be met. 2. start clock and maintain stable condition. 3. for the minimum of 200 s after stable power and clock(ck, ck ), then apply nop or deselect & take cke high. 4. wait minimum of 400ns then issue precharge all co mmand. nop or deselect applied during 400ns period. 5. issue emrs(2) command. (to issue emrs(2) command, provide ?low? to ba0, ?high? to ba1.) 6. issue emrs(3) command. (to issue emrs(3) command, provide ?high? to ba0 and ba1.) 7. issue emrs to enable dll. (to issue "dll enable" command, pr ovide "low" to a0, "high" to ba0 and "low" to ba1 and a12.) 8. issue a mode register set command for ?dll reset? *2 . (to issue dll reset command, provide "high" to a8 and "low" to ba0-1) 9. issue precharge all command. 10. issue 2 or more auto-refresh commands. 11. issue a mode register set command with low to a8 to initializ e device operation. (i.e. to program operating parameters witho ut resetting the dll. 12. at least 200 clocks after step 8, execute ocd ca libration ( off chip driver impedance adjustment ). if ocd calibration is not used, emrs o cd default command (a9=a8= a7=1) followed by emrs ocd calibration mode exit com- mand (a9=a8=a7=0) must be issued with other operating parameters of emrs. 13. the gddr2 sdram is now ready for normal operation. *1) to guarantee odt off, v ref must be valid and a low level must be applied to the odt pin. *2) if dc voltage level of v ddl or v dd is intentionally changed during normal operati on, (for example, for the purpose of v dd corner test, or power saving) ?dll reset? must be executed. read and write accesses to the gddr2 sdram are burst oriented; accesses start at a se lected location and continue for a burst length of four or eight in a programmed sequence. accesses begi n with the registration of an acti ve command, which is then foll owed by a read or write command. the address bits registered coincident with the active command are used to select the bank and row to be accessed (ba0, ba1 select the bank; a0-a12 select the row). the address bits register ed coincident with the read or write comma nd are used to select the starting column location for the burst access and to determine if the auto precharge command is to be is sued. prior to normal operation, the gddr2 sdram must be initialized . the following sections provide detailed information covering de vice initialization, register definition, co mmand descriptions and device operation. power up and initialization basic functionality - 21 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc for application flexibility, burst length, burst type, cas latency, dll reset function, write recovery time(twr) are user defined variables and must be programmed with a mode regist er set (mrs) command. additionally, dll di sable function, driver impedance, additive cas latency, odt(on die termination), single-ended strobe, and o cd(off chip driver impedance adju stment) are also user defined variables and must be programmed with an extended mode register set (emrs) command. contents of the mode register(mr) or extended mode registers(emr(#)) can be altered by re-executing th e mrs and emrs commands. if the user chooses to modify only a subset of the mrs or emrs variables, all variables mu st be redefined when the mrs or emrs commands are issued. mrs, emrs and reset dll do not affect array contents, which m eans reinitialization including those can be executed any time aft er power-up without affecting array contents. initialization sequence after power up /ck ck cke command pre all pre all emrs mrs ref ref mrs emrs emrs any cmd dll enable dll reset ocd default ocd cal. mode exit follow ocd flowchart 400ns trfc trfc trp trp tmrd tmrd tmrd toit min. 200 cycle nop odt tcl tch tis v ih (ac) programming the mode register - 22 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc the mode register stores the data for controlling the various operating mo des of gddr2 sdram. it controls cas latency, burst length, burst sequence, test mode, dll reset, twr and various vendor spec ific options to make gddr2 s dram useful for various applicatio ns. the default value of the mode register is not defined, therefore the mo de register must be written after power-up for proper op eration. the mode register is written by asserting low on cs , ras , cas , we , ba0 and ba1, while controlling the state of address pins a0 ~ a15. the gddr2 sdram should be in all bank precharge with cke al ready high prior to writing into the mode register. the mode re g- ister set command cycle time (tmrd) is required to complete the wr ite operation to the mode regi ster. the mode register content s can be changed using the same comma nd and clock cycle requirements dur ing normal operation as long as all banks are in the precharg e state. the mode register is divided into various fields depending on functionality. burst length is defined by a0 ~ a2 with opt ions of 4 and 8 bit burst lengths. the burst length decodes are compatible with gddr sdram. burst address sequence type is defined by a3, cas latency is defined by a4 ~ a6. the gddr2 doesn?t support half clo ck latency mode. a7 is used for test mode. a8 is used for dll reset. a7 must be set to low for normal mrs operation. write recovery time twr is defined by a9 ~ a11. refer to the table for specific codes. *1 : wr(write recovery fo r autoprecharge) min is determined by tck max and wr max is determined by tck min. wr in clock cycles is calculated by dividing twr (in ns) by tck (in ns) and rounding up a non-integer value to the next integer (wr[cycles] = twr(ns)/tck(ns)). the mode register must be programmed to this valu e. this is also used with trp to determin e tdal. cas latency a6 a5 a4 latency 000 reserved 001 reserved 010 reserved 011 3 100 4 101 5 110 6 111 reserved burst length a2 a1 a0 burst length 010 4 011 8 burst type a3 type 0 sequential 1 interleave ba 1 ba 0 a 12 a 11 a 10 a 9 a 8 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 ba1 ba0 mrs mode 00 mrs 01 emrs (1) 1 0 emrs (2) : reserved 1 1 emrs (3) : reserved dll a8 dll reset 0no 1yes test mode a7 mode 0 normal 1test 00pd twr *1 dll tm cas latency bt burst length a12 active power down exit time 0 fast exit (use txard) 1 slow exit (use txards) write recovery for auto precharge a11 a10 a9 mrs select 000 reserved 001 reserved 010 3 011 4 100 5 101 reserved 110 reserved 111 reserved gddr2 sdram mode register set (mrs) address bus mode register - 23 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc emrs(1) the extended mode register(1) stores the data for enabling or disa bling the dll, output driver strength, odt value selection an d addi- tive latency. the default value of the extended mode register is not defined, therefore the extended mode register must be writ ten after power-up for proper operation. the extended mode register is written by asserting low on cs , ras , cas , we and high on ba0, while controlling the states of address pins a0 ~ a12. the gddr2 sdram should be in all bank precharge with cke already high prior to writ- ing into the extended mode register. the mode register set command cycle time (tmrd) mu st be satisfied to complete the write op era- tion to the extended mode register. mode r egister contents can be changed using the same command and clock cycle requirements during normal operation as long as all banks are in the precharge state. a0 is used for dll enable or disable. a1 is used for e nabling a half strength data-output driver. a3~a5 determines the additive latency, a2 a nd a6 are used for odt value selection, a7~a9 are used for ocd control, a10 is used for dqs# disable. dll enable/disable the dll must be enabled for normal operation. dll enable is requi red during power up initialization, and upon returning to norm al oper- ation after having the dll disabled. the dll is automatically di sabled when entering self refres h operation and is automaticall y re- enabled upon exit of self refresh operation. any time the dll is enabled (and subsequently reset), 200 clock cycles must occur before a read command can be issued to allow time for the internal clock to be synchronized with the external clock. failing to wait for synchro- nization to occur may result in a violation of the tac or tdqsck parameters. emrs(2) the extended mode register(2) controls refr esh related features. the default value of the extended mode register(2) is not defi ned, therefore the extended mode register(2) mu st be written after power-up for proper oper ation. the extended mode register(2) is w ritten by asserting low on cs , ras , cas , we , high on ba1 and low on ba0, while controlling th e ststes of address pins a0 ~ a15. the gddr2 sdram should be in all bank precharge with cke already high prior to writing into the extended mode register(2). the mode regis ter set command cycle time (tmrd) must be satisfied to complete the writ e operation to the extended mode register(2). mode register con tents can be changed using the same command and clock cycle requirements during normal operation as long as all banks are in the pre- charge state. gddr2 sdram extended mode register set - 24 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc emrs (1) programming a0 dll enable 0 enable 1 disable a. al 5 option is avai lable only for 256mb gddr2. a5 a4 a3 additive latency 000 0 001 1 010 2 011 3 100 4 101 5 a 1 1 0 reserved 1 1 1 reserved a: when adjust mode is issued, al from previously set value must be applied. b: after setting to default, ocd mode needs to be exited by setting a9-a7 to 000. refer to the follow- ing 3.2.2.3 section for detailed information. a9 a8 a7 ocd calibration program 000 ocd calibration mode exit; maintain setting 0 0 1 drive(1) 0 1 0 drive(0) 100 adjust mode a 111 ocd calibration default b a1 output driver impedance control driver size 0 normal 100% 1 weak 60% a10 dqs 0 enable 1 disable a6 a2 r tt ( nominal ) 0 0 odt disabled 0 1 75 ohm 1 0 150 ohm 1 1 50 ohm ba1 ba0 mrs mode 00 mrs 01 emrs(1) 1 0 emrs(2): reserved 1 1 emrs(3): reserved a. outputs disabled - dqs, dqss, dqs s . this feature is used in conjunction with dimm idd meaurements when iddq is not desired to be included. a12 qoff (optional) a 0 output buffer enabled 1 output buffer disabled a10 (dqs enable) strobe function matrix dqs dqs 0 (enable) dqs dqs 1 (disable) dqs hi-z ba1ba0a12a11a10a9a8a7a6a5a4a3a2a1a0 0 1 qoff 0 dqs ocd program rtt additive latency rtt d.i.c dll - 25 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc *1 : the rest bits in emrs(2) is reserved for future use and all bits except a0, a1, a2, a7and ba0, ba1, must be programmed to 0 when setting the mode register during initialization. . *2 : if pasr (partial array self refresh) is enabled, data loca ted in areas of the array bey ond the specified location will be loast if self refresh is entered. data integrity will be maintained if tref condit ions are met and no self refresh command is issued. pasr is suppor ted from the device of 90nm technology(512mb c-die). *1 : all bits in emrs(3) except ba0 and ba1 are reserved fo r future use and must be programmed to 0 when setting the mode register during initialization. address field extended mode register(2) ba1 ba0 mrs mode 00 mrs 01 emrs(1) 10 emrs(2) 1 1 emrs(3): reserved a7 high temperature self-refresh rate enable 1 enable 0 disable a2 a1 a0 partial array self refresh for 4 banks 000 full array 0 0 1 half array(ba[1:0]=00&01) 0 1 0 quarter array(ba[1:0]=00) 0 1 1 not defined 1 0 0 3/4 array(ba[1:0]=01, 10&11) 1 0 1 half array(ba[1:0]=10&11) 1 1 0 quarter array(ba[1:0]=11) 1 1 1 not defined ba1 ba0 a12 a11 a10 a9 a8 a7 a6 a5 a4 a3 a2 a1 a0 1 0 *1 0 *1 srf 0 *1 psar *2 address field extended mode register(3) ba1 ba0 a12 a11 a10 a9 a8 a7 a6 a5 a4 a3 a2 a1 a0 11 0 *1 emrs (2) programming emrs (3) programming : reserved *1 - 26 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc gddr2 sdram supports driver calibration feature and the flow char t below is an example of sequenc e. every calibration mode com- mand should be followed by ?ocd calibration mode exit? before any other command being issued. mrs should be set before enterin g ocd impedance adjustment and odt (on die termination) should be carefully c ontrolled depending on system environment. start emrs: drive(1) dq & dqs high; dqs low test emrs : enter adjust mode bl=4 code input to all dqs inc, dec, or nop emrs: drive(0) dq & dqs low; dqs high test emrs : enter adjust mode bl=4 code input to all dqs inc, dec, or nop emrs: ocd calibration mode exit end all ok all ok need calibration need calibration emrs: ocd calibration mode exit emrs: ocd calibration mode exit emrs: ocd calibration mode exit emrs: ocd calibration mode exit emrs: ocd calibration mode exit mrs shoud be set before entering ocd impedance adjustment and odt should be carefully controlled depe nding on system environment off-chip driver (ocd ) impedance adjustment - 27 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc to adjust output driver impedance, c ontrollers must issue the adjust emrs co mmand along with a 4bit burst code to gddr2 sdram as in the following table. for this operation, burst length has to be set to bl = 4 via mrs command before activating ocd and controllers must drive this burst code to all dqs at the same ti me. dt0 in the following table means all dq bits at bit time 0, dt1 at bit time 1, and so forth. the driver output impedance is adju sted for all gddr2 sdram dqs simultaneously and after ocd calibration, all dqs of a given gddr2 sdram will be adjusted to the same driver strength setting. the maximum step count for adjustment is 16 an d when the limit is reached, further incremen t or decrement code has no effect. the default setting may be any step within the 16 step range. when adjust mode command is issued, al from previously set value must be applied . extended mode register set for ocd impedance adjustment ocd impedance adjustment can be done using t he following emrs mode. in drive mode all outputs are driven ou t by gddr2 sdram and drive of dqs is dependent on emrs bit enabling dqs operation. in drive(1) mode, all dq, dqs signals are driven high and all dqs signals are driven low. in drive(0) mode, all dq, dqs signals are driven low and all dqs signals are driven high. in adjust mode, bl = 4 of operation code data must be used. in case of ocd calibrati on default, output driver characte ristics have a nominal impedance value of 18 ohms during nominal temperature and voltage conditions. ou tput driver characteristics fo r ocd calibration default are spe cified in section 6. ocd applies only to normal full strength output drive setting defined by emrs(1) and if ha lf strength is set, ocd de fault output driver characteristics are not applicable. when ocd calibra tion adjust mode is used , ocd default output driver characteristics are not applicable. after ocd calibration is comple ted or driver strength is set to default, subsequent emrs commands not intended to adjust ocd characteristics must specify a9 -a7 as '000' in order to maintain the default or calibrated value. off- chip-driver program a9 a8 a7 operation 0 0 0 ocd calibration mode exit 0 0 1 drive(1) dq, dqs high and dqs low 0 1 0 drive(0) dq, dqs low and dqs high 100adjust mode 1 1 1 ocd calibration default ocd impedance adjust off- chip-driver program for proper operation of adj ust mode, wl = rl - 1 = al + cl - 1 clocks and td s/tdh should be met as the following timing diagr am. for input data pattern for adjustment, dt0 - dt3 is a fixed order and "not affected by mrs addressing mode (ie. sequential or inter leave). 4bit burst code inputs to all dqs operation d t0 d t1 d t2 d t3 pull-up driver strength pull-down driver strength 0000 nop (no operation) nop (no operation) 0 0 0 1 increase by 1 step nop 0010 decrease by 1 step nop 0100 nop increase by 1 step 1000 nop decrease by 1 step 0101 increase by 1 step increase by 1 step 0110 decrease by 1 step increase by 1 step 1001 increase by 1 step decrease by 1 step 1010 decrease by 1 step decrease by 1 step other combinations reserved - 28 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc drive mode drive mode, both drive(1) and drive(0), is used for controllers to measure gddr2 sdram driver impedance. in this mode, all outp uts are driven out toit after ?enter drive mode? command and all out put drivers are turned-off toit after ?ocd calibration mode exi t? com- mand as the following timing diagram. nop nop nop nop emrs dt0 cmd ck dqs_in dq_in tds tdh wl ocd adjust mode ocd calibration mode exit dt1 dt2 dt3 wr emrs nop nop ck dqs dm v il (ac) v il (dc) v ih (ac) v ih (dc) emrs nop nop nop emrs cmd ck dqs dq enter drive mode ocd calibration mode exit toit hi-z dqs high for drive(1) dqs high & dqs low for drive(1), dqs low & dqs high for drive(0) hi-z dqs low for drive(0) toit ck dqs - 29 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc odt (on die termination) on die termination (odt) is a feature that allows a dram to tu rn on/off termination resistance. for x16 configuration odt is ap plied to each dq, udqs/udqs , ldqs/ldqs , udm, and ldm signal via the odt control pin. the odt feature is designed to improve signal integrity of the memory channel by allowin g the dram controller to independently turn on/off termination resistance for any or all dram devices. the odt function is supported for active and standby modes, and turned off and not supported in self refresh mode. odt dc electrical characteristics note 1: test condition for rtt measurements measurement definition for rtt(eff): apply v ih (ac) and v il (ac) to test pin separately, then measure current i(v ih (ac)) and i( v il (ac)) respec- tively. v ih (ac), v il (ac), and vddq values defined in sstl_18 measurement definition for vm : measure voltage (v m ) at test pin (midpoint) with no load. parameter/condition symbol min nom max units notes rtt effective impedance value for emrs(a 6,a2)=0,1; 75 ohm rtt1(eff) 60 75 90 ohm 1 rtt effective impedance value for emrs(a6, a2)=1,0; 150 ohm rtt2(eff) 120 150 180 ohm 1 rtt mismatch tolerance between any pull- up/pull-down pair rtt(mis) -3.75 +3.75 % 1 rtt(eff) = v ih (ac) - v il (ac) i( v ih (ac) ) - i( v il (ac) ) delta vm = 2 x vm v ddq x 100% - 1 functional representation of odt input pin dram vssq vssq vddq vddq rval2 rval2 rval1 rval1 sw1 sw1 sw2 sw2 selection among sw1, sw2 and sw3 is determined by ?rtt (nominal)? in emrs termination included on all dqs, dm, dqs, dqs , rdqs, and rdqs pins. switch (sw1, sw2, sw3) is enabled by odt pin. input buffer vssq vddq rval3 rval3 sw3 sw3 - 30 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc odt timing for active/standby mode t0 t1 t2 t3 t4 t5 t aond ck ck cke odt internal term res. t6 t aofd t is t is t aon,min t aon,max t aof,min t aof,max rtt v ih (ac) v il (ac) odt timing for powerdown mode t0 t1 t2 t3 t4 t5 ck ck cke odt internal te r m r e s . t6 t is t is t aonpd,min t aofpd,max t aonpd,max t aofpd,min rtt v il (ac) v ih (ac) - 31 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc odt timing mode switch at entering power down mode t-5 t-4 t-3 t-2 t-1 t0 ck ck t1 cke odt internal term res. t is t aofd rtt t is rtt t2 t3 t4 odt internal term res. active & standby mode timings to be applied. power down mode tim- ings to be applied. t aofpdmax t is odt internal term res. t is t aond rtt t is rtt odt internal term res. active & standby mode timings to be applied. power down mode tim- ings to be applied. t aonpdmax t anpd entering slow exit ac tive power down mode or precharge power down mode. v il (ac) v il (ac) v ih (ac) v ih (ac) - 32 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc odt timing mode switch at exiting power down mode t0 t1 t4 t5 t6 t7 ck ck t8 cke odt internal term res. t is t aofpdmax rtt t is t is rtt t9 t10 t11 odt internal te r m r e s . t axpd active & standby mode timings to be applied. power down mode tim- ings to be applied. t aofd internal term res. t is rtt odt active & standby mode timings to be applied. t aond internal te r m r e s . rtt odt t aonpdmax t is power down mode tim- ings to be applied. v ih (ac) v il (ac) v il (ac) v ih (ac) v ih (ac) exiting from slow active power down mode or precharge power down mode. - 33 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc address ck / ck t0 t2 t1 t3 tn tn+1 tn+2 tn+3 command bank a row addr. bank a activate bank a col. addr. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . internal ras -cas delay (>= t rcdmin ) : ?h? or ?l? ras cycle time ( >= t rc ) additive latency delay ( al ) read a post cas bank b row addr. bank b activate bank b col. addr. read b post cas bank a bank a precharge bank b addr. bank b precharge bank a row addr. active bank a ras - ras delay time (>= t rrd ) read begins rcd =1 addr. bank active (>= t ras ) bank precharge time ( >= t rp ) cas -cas delay time (t ccd ) bank activate command cycle: trcd = 3, al = 2, trp = 3, trrd = 2, tccd = 2 posted cas operation is supported to make command and data bus effi cient for sustainable bandwidths in gddr2 sdram. in this operation, the gddr2 sdram allows a cas read or write command to be issued immediately after the ras bank activate command (or any time during the ras -cas -delay time, trcd, period). the command is held for th e time of the additive latency (al) before it is issued inside the device. the read latency (rl) is controlled by the sum of al and the cas latency (cl). therefor e if a user chooses to issue a r/w command before the trcdmin, th en al (greater than 0) must be written into the emr(1). the write latency (wl) is always defined as rl - 1 (read latency -1) where read latency is defined as the sum of additive latency plus cas latency (rl=al +cl). read or write operations using al allow seamless bursts (refer to seamless operation timing diagram examples in read burst and write burst section) bank activate command read and write access modes after a bank has been activated, a read or write cycle can be executed. th is is accomplished by setting ras high, cs and cas low at the clock?s rising edge. we must also be defined at this time to determine whether the access cycle is a read operation (we high) or a write operation (we low). the ddr2 sdram provides a fast column acce ss operation. a single read or write comm and will initiate a serial read or write ope ration on successive clock cycles. the boundary of the burst cycle is strictly restricted to specific s egments of the page length. for example, the 32mbit x 4 i/o x 4 bank chip has a page length of 2048 bits (defined by ca0-ca9, ca11). the page length of 2048 is divided into 512 or 256 uniquely addressa ble boundary segments depending on burst length, 512 for 4 bit burst, 256 for 8 bit burst re spectively. a 4-bit or 8 bit burst operation will occur e ntirely within one of the 512 or 256 groups beginning with the column address suppl ied to the device during the read or write command (ca0-ca9, ca11). the second, t hird and fourth access will also occur within this gr oup segment, however, the burst order is a function of the starting address, and the burst sequence. a new burst access must not interrupt the previous 4 bit burst operation in case of bl = 4 setting. however, in case of bl = 8 setting, two cases of interrupt by a new burst access are allowed, one reads interrupted by a read, the other writes interrupted by a write with 4 bit burst bo undry respectively. the min- imum cas to cas delay is defined by tccd, and is a minimum of 2 clocks for read or write cycles. - 34 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc examples of posted cas operation example 1 read followed by a write to the same bank [al = 2 and cl = 3, rl = (al + cl) = 5, wl = (rl - 1) = 4] 0123456789101112 active a-bank read a-bank write a-bank dout0 dout1 dout2 dout3 din0 din1 din2 din3 ck/ck cmd dqs/dqs dq al = 2 -1 > = trcd cl = 3 > = trac wl = rl -1 = 4 rl = al + cl = 5 example 2 read followed by a write to the same bank [al = 0 and cl = 3, rl = (al + cl) = 3, wl = (rl - 1) = 2] active a-bank read a-bank write a-bank dout0 dout1 dout2 dout3 din0 din1 din2 din3 al = 0 > = trcd cl = 3 > = trac wl = rl -1 = 2 rl = al + cl = 3 0123456789101112 -1 ck/ck cmd dqs/dqs dq burst mode operation is used to provide a c onstant flow of data to memory locations (write cycle), or from memory locations (re ad cycle). the parameters that define how the burst mode will operate are burst sequence and burst le ngth. gddr2 sdram supports 4 bit burst and 8 bit burst modes only. for 8 bit burst mode, full in terleave address ordering is supp orted, however, sequential addr ess order- ing is nibble based for ease of implementation. the burst type, either sequential or interleaved, is programmable and defined b y the address bit 3 (a3) of the mrs, which is similar to the ddr s dram operation. seamless burst read or write operations are support ed. unlike ddr devices, interruption of a burst read or write cycle during bl = 4 mode operation is prohibited. however in case of bl = 8 mode, interruption of a burst read or write operation is limited to two cases, r eads interrupted by a read, or writes interrupt ed by a write. therefore the burst stop command is not supported on gddr2 sdram devices. posted cas - 35 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc bl = 4 bl = 8 note : page length is a function of i/o organization and column addressin burst length starting address (a1 a0) sequential addressing (decimal) interleave addressing (decimal) 4 0 0 0, 1, 2, 3 0, 1, 2, 3 0 1 1, 2, 3, 0 1, 0, 3, 2 1 0 2, 3, 0, 1 2, 3, 0, 1 1 1 3, 0, 1, 2 3, 2, 1, 0 burst length starting address (a2 a1 a0) sequential addressing (decimal) interleave addressing (decimal) 8 0 0 0 0, 1, 2, 3, 4, 5, 6, 7 0, 1, 2, 3, 4, 5, 6, 7 0 0 1 1, 2, 3, 0, 5, 6, 7, 4 1, 0, 3, 2, 5, 4, 7, 6 0 1 0 2, 3, 0, 1, 6, 7, 4, 5 2, 3, 0, 1, 6, 7, 4, 5 0 1 1 3, 0, 1, 2, 7, 4, 5, 6 3, 2, 1, 0, 7, 6, 5, 4 1 0 0 4, 5, 6, 7, 0, 1, 2, 3 4, 5, 6, 7, 0, 1, 2, 3 1 0 1 5, 6, 7, 4, 1, 2, 3, 0 5, 4, 7, 6, 1, 0, 3, 2 1 1 0 6, 7, 4, 5, 2, 3, 0, 1 6, 7, 4, 5, 2, 3, 0, 1 1 1 1 7, 4, 5, 6, 3, 0, 1, 2 7, 6, 5, 4, 3, 2, 1, 0 burst length and sequence the burst read command is initiated by having cs and cas low while holding ras and we high at the rising edge of the clock. the address inputs determine the starting column address for the burs t. the delay from the start of the command to when the data fr om the first cell appears on the outputs is equal to the value of th e read latency (rl). the data stro be output (dqs) is driven low 1 clock cycle before valid data (dq) is driven onto the data bus. the first bi t of the burst is synchronized with the rising edge of the data strobe (dqs). each subsequent data-out appears on the dq pin in phase with t he dqs signal in a source synchronous manner. the rl is equal to an additive latency (al) plus cas latency (cl). the cl is defined by the mode regi ster set (mrs), similar to the existing sdr and ddr sdrams. the al is defined by the ex tended mode register set (1)(emrs(1)). gddr2 sdram pin timings are specified for either single ended m ode or differen-tial mode depending on the setting of the emrs ?enable dqs? mode bit; timing advantages of differential mode are realized in system design. the meth od by which the gddr2 sdra m pin timings are measured is mode dependent. in single ended mode, timing relationships are measured relative to the rising or falling edges of dqs crossing at vref. in differential mode, these timing relationships are measured relative to the crosspoint of dqs and its complement, dqs . this distinction in timing methods is guaranteed by design and characterization. note that when differential data strobe mode is disabled via the emrs, the complementary pin, dqs , must be tied externally to vss through a 20 ohm to 10 kohm resis-tor to insure proper operation. burst mode operation - 36 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc cmd nop nop nop nop nop nop nop dqs nop ck/ck douta 0 douta 1 douta 2 douta 3 read a posted cas al = 2 cl =3 rl = 5 dqs =< t dqsck t0 t2 t1 t3 t4 t5 t6 t7 t8 t ch t cl ck ck ck dqs dq dqs dqs t rpst q t rpre t dqsqmax t qh t qh t dqsqmax q qq burst read operation: rl = 5 (al = 2, cl = 3, bl = 4) the burst write command is initiated by having cs , cas and we low while holding ras high at the rising edge of the clock. the address inputs determine the starting column address. write latency (wl) is defined by a read latency (rl) minus one and is equ al to (al + cl -1). a data strobe signal (dqs) should be driven low (pream ble) one clock prior to the wl. the first data bit of the burst cycle must be applied to the dq pins at the first rising edge of t he dqs following the preamble. the td qss specification must be sati sfied for write cycles. the subsequent burst bit data are issued on successi ve edges of the dqs until the burst length is completed, whic h is 4 or 8 bit burst. when the burst has finished, any additional data suppl ied to the dq pins will be ignored. the dq signal is ignored after the burst write operation is complete . the time from the completion of the burst wr ite to bank precharge is the write recovery time (wr). gddr2 sdram pin timings are specified for either single ended mode or differen-tial mode dependi ng on the setting of the emrs ?enable dqs? mode bit; timing advantages of differential mode ar e realized in system design. t he method by which the gddr2 sdra m pin timings are measured is mode dependent. in single ended mode, timing relationships are measured relative to the rising or f alling edges of dqs crossing at v ref . in differential mode, these timing relationships are measured relative to the crosspoint of dqs and its complement, dqs . this distinction in timing methods is guaranteed by desi gn and characterization. note that when differential data strobe mode is disabled via the emrs, the complementary pin, dqs , must be tied externally to vss through a 20 ohm to 10k ohm resistor to insure proper operation. burst read command - 37 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc cmd nop nop nop nop nop nop nop dqs nop ck/ck dout a 0 dout a 1 dout a 2 dout a 3 read a cas cl =3 rl = 3 dqs =< t dqsck t0 t2 t1 t3 t4 t5 t6 t7 t8 dout a 4 dout a 5 dout a 6 dout a 7 cmd post cas nop nop nop nop nop dq?s nop ck/ck t0 tn-1 t1 tn tn+1 tn+2 tn+3 tn+4 tn+5 dout a 0 dout a 1 dout a 2 dout a 3 dqs din a 0 din a 1 din a 2 din a 3 read a wl = rl - 1 = 4 rl =5 post cas write a t rtw (read to write turn around time) nop the minimum time from the burst read command to the burst write command is defin ed by a read-to-write-tu rn-around-time, which i s 4 clocks in case of bl = 4 operation, 6 clo cks in case of bl = 8 operation. burst read operation: rl = 3 (al = 0 and cl = 3, bl = 8) burst read followed by burst write: rl = 5, wl = (rl-1) = 4, bl = 4 - 38 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc the seamless burst read operation is suppor ted by enabling a read command at every other clock for bl = 4 operation, and every 4 clock for bl = 8 operation. this operation is allowed regardless of same or different banks as long as the banks are activated. cmd nop nop nop nop nop nop dqs nop ck/ck t0 t2 t1 t3 t4 t5 t6 t7 t8 dout a 0 dout a 1 dout a 2 dout a 3 read a0 post cas al = 2 cl =3 rl = 5 dqs dout a 4 dout a 5 dout a 6 read a4 post cas burst read can only be interrupted by anot her read with 4 bit burst boundary. any other case of read interrupt is not allowed. read burst interrupt timing exam ple: (cl=3, al=0, rl=3, bl=8) ck/ck cmd dqs/dqs dqs read b read a nop nop nop nop nop nop nop nop a0 a1 a2 a3 b0 b1 b2 b3 b4 b5 b6 b7 notes: 1. read burst interrupt function is only allowed on burst of 8. burst interrupt of 4 is prohibited. 2. read burst of 8 can only be interrupted by another read comm and. read burst interruption by write command or precharge comm and is prohibited. 3. read burst interrupt must occur exactly two clocks after pr evious read command. any other read burst interrupt timings are p rohibited. 4. read burst interruption is al lowed to any bank inside dram. 5. read burst with auto precharge enabled is not allowed to interrupt. 6. read burst interruption is allowed by another read with auto precharge command. 7. all command timings are referenced to burst length set in the mode register. they are not referenced to actual burst. for example, minimum read to precharge timing is al + bl/2 where bl is the burst length set in the mode register and not the ac tual burst (which is shorter because of interrupt). - 39 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc t ds t ds t dh t wpre t wpst t dqsh t dqsl dqs dqs d dmin dqs/ dq dm t dh dmin dmin dmin d d d dqs v il (ac) v ih (ac) v il (ac) v ih (ac) v il (dc) v ih (dc) v il (dc) v ih (dc) burst write operation: rl = 5, wl = 4, twr = 3 (al=2, cl=3), bl = 4 cmd dqs ck/ck t0 t2 t1 t3 t4 t5 t6 t7 tn dqs nop nop nop nop nop nop nop write a posted cas wl = rl - 1 = 4 < = t dqss > = wr din a 0 din a 1 din a 2 din a 3 precharge completion of the burst write burst write operation the burst write command is initiated by having cs , cas and we low while holding ras high at the rising edge of the cloc k. the address inputs determine the starting column address. write latency (wl) is defined by a read latency (rl) minus one and is equal to (al + cl -1);and is the number of clocks of delay that are required from the time the write command is regi stered to the clock edge associated to the first dqs strobe. a d ata strobe signal (dqs) should be driven low (preamble) on e clock prior to the wl. the first data bit of the burst cycle must be applied to the dq pins at the first rising edge of the dqs following the preamble. the tdqss spec ification must be satisfied for each positiv e dqs transition to its associated clock edge during write cycles. the subsequent burst bit data are issued on succ essive edges of the dqs until the burst length is completed, which is 4 or 8 bi t burst. when t he burst has finished, any additional data supplied to the dq pins will be ignored. the dq signal is ignored after the burst write opera tion is complete. the time from the completion of the burst write to bank precharge is the write recovery time (wr). ddr2 sdram pin timings are specified for either single ended mode or differen-tial mode depending on the setting of the emrs ?enable dqs? mode bit; timing advantages of differential mode are realized in system design. the method by which the ddr2 sdram pin timings are m easured is mode de- pendent. in single ended mode, timing relationships are measured relative to the rising or falling edges of dqs crossing at the specified ac/dc levels. in differential mode, these timing relationshi ps are measured relative to the cros spoint of dqs and its complement, dqs . this distinction in timing methods is guaranteed by design and characterization. note that when di fferential data strobe mode is disabled via the emrs, the comple mentary pin, dqs , must be tied externally to vss through a 20 ohm to 10k ohm resistor to insure proper operation. - 40 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc burst write operation: rl = 3, wl = 2, twr = 2 (al=0, cl=3), bl = 4 cmd nop nop nop nop precharge nop dqs nop ck/ck t0 t2 t1 t3 t4 t5 t6 t7 tn write a cas wl = rl - 1 = 2 dqs < = t dqss > = wr din a 0 din a 1 din a 2 din a 3 bank a completion of the burst write activate > = trp burst write followed by burst read: rl = 5 (al=2, cl=3), wl = 4, twtr = 2, bl = 4 cmd nop nop nop nop dq ck/ck t0 t2 t1 t3 t4 t5 t6 t7 t8 dout a 0 dout a 1 dout a 2 dout a 3 nop dqs wl = rl - 1 = 4 post cas read a nop rl =5 al = 2 cl = 3 nop nop write to read = cl - 1 + bl/2 + twtr > = twtr t9 the minimum number of clock from the burst write command to the burst read command is [cl - 1 + bl/2 + twtr]. this twtr is no t a write recovery time (twr) but the time required to transfer the 4bit write data from the input buff er into sense amplifiers in the array. twtr is defined in ac spec table of this data sheet. - 41 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc seamless burst write operation: rl = 5, wl = 4, bl=4 the seamless burst write operation is support ed by enabling a write command every other clock for bl = 4 operation, every four clocks for bl = 8 operation. this operation is a llowed regardless of same or different ban ks as long as the banks are activated. cmd nop nop nop nop nop nop dq?s nop ck/ck t0 t2 t1 t3 t4 t5 t6 t7 t8 din a 0 din a 1 din a 2 din a 3 write a0 post cas wl = rl - 1 = 4 dqs write a1 post cas din a 0 din a 1 din a 2 din a 3 notes: 1. write burst interrupt function is only allowed on burst of 8. burst interrupt of 4 is prohibited. 2. write burst of 8 can only be interrupted by another write command. write burst interruption by read command or precharge co mmand is prohibited. 3. write burst interrupt must occur exactly two clocks after pr evious write command. any other write burst interrupt timings ar e prohibited. 4. write burst interruption is allowed to any bank inside dram. 5. write burst with auto precharge enabled is not allowed to interrupt. 6. write burst interruption is allowed by another write with auto precharge command. 7. all command timings are referenced to burst length set in the mode register. they are not referenced to actual burst. for example, minimum write to precharge timing is wl+bl/2+twr where twr starts with the ri sing clock after the un-interrupted burst end and not from the end of actual burst end. writes intrrupted by a write burst write can only be interrupted by anot her write with 4 bit burst boundary. any othe r case of write interrupt is not allowe d. write burst interrupt timing example: (cl=3, al=0, rl=3, wl=2, bl=8) ck/ck cmd dqs/dqs dqs nop nop nop nop nop nop nop nop a0 a1 a2 a3 b0 b1 b2 b3 b5 b6 b7 write b write a b4 - 42 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc one write data mask (dm) pin for each 8 data bits (dq) will be supported on gddr2 sdrams, cons istent with the implementation on gddr sdrams. it has identical timings on write operations as t he data bits, and though used in a uni-directional manner, is int ernally loaded identically to data bits to insure matched system timi ng. dm of x16 bit organization is not used during read cycles. dqs/ dq dm t ds t dh t ds t dh write ck ck command dqs/dqs dq dm case 2 : max t dqss dqs/dqs dq dm t dqss t dqss t wr case 1 : min t dqss dqs v il (ac) v ih (ac) v il (dc) v ih (dc) v il (ac) v il (dc) v ih (ac) v ih (dc) write data mask data mask timing data mask function, wl=3, al=0, bl = 4 shown - 43 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc the precharge command is used to precharge or close a bank t hat has been activated. the precharge command is triggered when cs , ras and we are low and cas is high at the rising edge of the clock. the pr echarge command can be used to precharge each bank independently or all banks simultaneously. three address bits a10, ba0 and ba1 for 256mb are used to define which bank to pre- charge when the command is issued. minimum read to precharge command spacing to the same bank = al + bl/2 clocks. for the earliest possible precharge, the precharge command may be issued on the rising edge which is ?additive latency(al) + bl /2 clocks? after a read command. a new bank active (command) may be issued to the same bank after the ras precharge time (t rp ). a precharge command cannot be issued until t ras is satisfied. the minimum read to precharge spacing has also to satisfy a minimum analog time from the rising clock edge that initiates the last 4- bit prefetch of a read to precharge command. this time is called trtp (r ead t o p recharge). for bl = 4 this is the time from the actual read (al after the read command) to precharge command. for bl = 8 this is the time from al + 2 clocks after the read to the pre - charge command. a10 ba1 ba0 precharged bank(s) remarks low low low bank 0 only low low high bank 1 only low high low bank 2 only low high high bank 3 only high don?t care don?t care all banks bank selection for prech arge by address bits burst read operation followed by precharge example 1: burst read operation followed by precharge: rl = 4, al = 1, cl = 3, bl = 4, t rtp <= 2 clocks cmd nop nop precharge nop dq?s nop ck/ck dout a 0 dout a 1 dout a 2 dout a 3 read a post cas rl =4 dqs active bank a > = t rp nop cl =3 nop > = t ras t0 t2 t1 t3 t4 t5 t6 t7 t 8 al + bl/2 clks al = 1 cl = 3 > = t rtp precharge command - 44 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc example 2: burst read operation followed by precharge: rl = 4, al = 1, cl = 3, bl = 8, t rtp <= 2 clocks cmd nop nop nop nop dq?s nop ck/ck dout a 0 dout a 1 dout a 2 dout a 3 read a post cas rl =4 dqs precharge a nop t0 t2 t1 t3 t4 t5 t6 t7 t 8 al + bl/2 clks al = 1 cl = 3 > = t rtp dout a 4 dout a 5 dout a 6 dout a 8 first 4-bit prefetch second 4-bit prefetch nop example 3: burst read operation followed by precharge : rl = 5, al = 2, cl = 3, bl = 4, t rtp <= 2 clocks dq?s ck/ck dout a 0 dout a 1 dout a 2 dout a 3 al = 2 cl =3 rl =5 dqs > = t rp cl =3 > = t ras t0 t2 t1 t3 t4 t5 t6 t7 t 8 al + bl/2 clks > = t rtp cmd nop nop nop nop precharge a read a posted cas activate bank a nop nop - 45 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc example 4: burst read operation followed by precharge : rl = 6, al = 2, cl = 4, bl = 4, t rtp <= 2 clocks cmd dq?s ck/ck dout a 0 dout a 1 dout a 2 dout a 3 al = 2 cl =4 rl = 6 dqs > = t rp cl =4 > = t ras t0 t2 t1 t3 t4 t5 t6 t7 t 8 al + bl/2 clks > = t rtp example 5: burst read operation followed by precharge : rl = 4, al = 0, cl = 4, bl = 8, t rtp > 2 clocks cmd nop dq?s ck/ck dout a 0 dout a 1 dout a 2 dout a 3 read a post cas al = 0 cl =4 rl = 4 dqs > = t rp > = t ras t0 t2 t1 t3 t4 t5 t6 t7 t 8 al + 2 clks + max{trtp;2 tck}* * : rounded to next integer dout a 4 dout a 5 dout a 6 dout a 8 first 4-bit prefetch second 4-bit prefetch > = t rtp nop nop nop nop precharge a read a post cas activate bank a nop nop nop nop nop precharge a activate bank a nop nop - 46 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc minimum write to precharge command spac ing to the same bank = wl + bl/2 clks + twr for write cycl es, a delay must be satisfie d from the completion of the last burst writ e cycle until the precharge command can be i ssued. this delay is known as a write rec overy time (twr) referenced from the completion of the burst write to the precharge comm and. no precharge command should be issued prior to the twr delay. example 1 : burst write followed by precharge: wl = (rl-1) =3, bl=4 example 2 : burst write followed by precharge: wl = (rl-1) = 4, bl=4 cmd dqs ck/ck t0 t2 t1 t3 t4 t5 t6 t7 t 8 wl = 3 dqs > = t wr cmd nop nop nop nop nop nop dqs nop ck/ck t0 t2 t1 t3 t4 t5 t6 t7 t 9 din a 0 din a 1 din a 2 din a 3 write a posted cas wl = 4 dqs > = t wr precharge a completion of the burst write nop nop nop nop nop nop nop write a posted cas precharge a completion of the burst write din a 0 din a 1 din a 2 din a 3 burst write followed by precharge - 47 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc if a10 is high when a read command is issued, the read with auto-precharge function is engaged. the gddr2 sdram starts an auto precharge operation on the rising edge which is (al + bl/2) cycles later than the read with ap command if tras(min) and tr tp are satisfied. if tras(min) is not satisfied at the edge, the start point of auto-precharge oper ation will be delayed until tras(min) is sat isfied. if trtp(min) is not satisfied at the edg e, the start point of auto-precharge oper ation will be delayed until trtp(min) is sat isfied. in case the internal precharge is pushed out by trtp, trp starts at the point where the internal precharge happens (not at the next rising clock edge after this event). so for bl = 4 the minimum time from read_ap to the next activate command becomes al + (trtp + trp )* (see example 2) for bl = 8 the time from read_ap to the next activate is al + 2 + (trtp + trp)*, where ?*? means: ?rouded up to the next integer?. in any event internal precharge does not st art earlier than two clocks afte r the last 4-bit prefetch. a new bank activate (command) may be issued to the same b ank if the following two conditions are satisfied simultaneously. (1) the ras precharge time (trp) has been satisfied from the clock at which the auto precharge begins. (2) the ras cycle time (trc) from the previous bank activation has been satisfied. before a new row in an active bank can be opened, the active bank must be precharged using eit her the precharge command or th e auto-precharge function. when a read or a write command is given to the gddr2 sdram, the cas timing accepts one extra address, column address a10, to allow the active bank to automatically be gin precharge at the earliest po ssible moment during the burst read or write cycle. if a10 is low when the read or write command is i ssued, then normal read or write burst operation is executed and the bank remains active at the completion of the burst sequence. if a10 is high when th e read or write command is issued, then the auto- precharge function is engaged. during auto-precharge, a read comm and will execute as normal with the exception that the active bank will begin to precharge on the rising edge which is cas latency (cl) clock cycles befor e the end of t he read burst. auto-precharge also be implemented during write commands. t he precharge operation engaged by the auto precharge command will not begin until the last data of the burst write sequence is properly stored in the memory array. this feature allows the precharge operation to be partially or completely hidden during burst read cycles (dependent upon cas latency) thus improving system performance for random data access. the ras lockout circuit internally delays the precharge operation unt il the array restore operation has been completed (tr as satisfied) so that the aut o precharge command may be issued with any read or w rite command. burst read with auto precharge auto-precharge operation - 48 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc example 1: burst read operation with auto precharge: rl = 4, al = 1, cl = 3, bl = 8, t rtp <= 2 clocks cmd nop nop nop nop dq?s nop ck/ck dout a 0 dout a 1 dout a 2 dout a 3 read a post cas rl =4 dqs t0 t2 t1 t3 t4 t5 t6 t7 t 8 al + bl/2 clks al = 1 cl = 3 > = t rtp dout a 4 dout a 5 dout a 6 dout a 8 first 4-bit prefetch second 4-bit prefetch nop t rtp nop precharge begins here activate bank a > = t rp autoprecharge example 2: burst read operation with auto precharge: rl = 4, al = 1, cl = 3, bl = 4, t rtp > 2 clocks ck/ck t0 t2 t1 t3 t4 t5 t6 t7 t 8 cmd nop nop nop nop dq?s nop dout a 0 dout a 1 dout a 2 dout a 3 read a post cas rl =4 dqs > = al + trtp + trp al = 1 cl = 3 4-bit prefetch nop t rtp nop precharge begins here activate bank a autoprecharge t rp - 49 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc example 3: burst read with auto precharge followed by an activation to the same bank (trc limit): rl = 5 (al = 2, cl = 3, internal trcd = 3, bl = 4, t rtp <= 2 clocks) cmd nop nop nop nop nop dq?s nop ck/ck t0 t2 t1 t3 t4 t5 t6 t7 t8 dout a 0 dout a 1 dout a 2 dout a 3 read a post cas al = 2 cl =3 rl = 5 dqs activate bank a > = t rp a10 = 1 auto precharge begins cl =3 > = t rc nop > = tras(min) example 4: burst read with auto precharge followed by an activation to the same bank (trp limit): rl = 5 (al = 2, cl = 3, internal trcd = 3, bl = 4, t rtp <= 2 clocks) cmd nop nop nop nop nop dq?s nop ck/ck t0 t2 t1 t3 t4 t5 t6 t7 t8 dout a 0 dout a 1 dout a 2 dout a 3 read a post cas al = 2 cl =3 rl = 5 dqs activate bank a > = t rp a10 = 1 auto precharge begins cl =3 > = t rc nop > = tras(min) - 50 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc if a10 is high when a write command is issued, the write wit h auto-precharge function is e ngaged. the gddr2 sdram automatical ly begins precharge operation after the completi on of the burst write plus write recovery time (twr). the bank undergoing auto-pre charge from the completion of t he write burst may be reactivated if the following two conditions are satisfied. (1) the data-in to bank activate delay time (wr + trp) has been satisfied. (2) the ras cycle time (trc) from the previous bank activation has been satisfied. cmd nop nop nop nop nop bank a dqs nop ck/ck t0 t2 t1 t3 t4 t5 t6 t7 tm din a 0 din a 1 din a 2 din a 3 wra banka post cas wl =rl - 1 = 2 dqs/dqs a10 = 1 auto precharge begins nop > = wr completion of the burst write active > = t rp > = t rc burst write with auto-precharge (twr + trp): wl = 4, twr =2, trp=3, bl=4 cmd nop nop nop nop nop bank a dqs nop ck/ck t0 t4 t3 t5 t6 t7 t8 t9 t12 din a 0 din a 1 din a 2 din a 3 wra bank a post cas wl =rl - 1 = 4 dqs/dqs a10 = 1 auto precharge begins nop > = wr completion of the burst write active > = t rp > = t rc burst write with auto-precharge (trc li mit): wl = 2, twr =2, trp=3, bl=4 burst write with auto-precharge - 51 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc note : 1. the value of trtp is decided by the equation : max( ru - 52 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc the gddr2 sdram device has a built-in timer to accommodate self refresh operation. the self refr esh command is defined by hav - ing cs , ras , cas and cke held low with we high at the rising edge of the clock. odt mu st be turned off before issuing self refresh command, by either driving odt pin low or us ing emrs command. once the command is registered, cke must be held low to keep the device in self refresh mode. when the gddr2 sdram has entered se lf refresh mode all of the external signals except cke, are ?don?t care?. since cke is an sstl 2 input, v ref must be maintained during self refresh operation. the dram initiates a minimum of one one auto refresh command internally within tcke period once it enters self refresh mode. the clock is internally disabled d uring self refresh operation to save power. the mi nimum time that the gddr2 sdram must remain in self refresh mode is tcke. the user may change the external clock frequency or halt the external cl ock one clock after self-refresh entry is registered, however, t he clock must be restarted and stable before the devi ce can exit self refresh operation. once self refresh exit command is registered, a delay equal or longer than the txsnr or txsrd must be satisfied before a valid command c an be issued to the device. cke must remain h igh for the entire self refresh exit period txsrd for proper operatio n. upon exit from self refres h, the gddr2 sdram can be put bac k into self refresh mode after txsrd expires. nop or deselect commands must be registered on each positive clock edge during the self refresh exit interval. odt should also be turned off during t xsrd. upon exit from self refres h, the gddr2 sdram requires a mini - mum of one extra auto refresh command before it is put back into self refresh mode. - device must be in the ?all banks idle? state prior to entering self refresh mode. - odt must be turned off taofd before entering self refresh mo de, and can be turned on again when txsrd timing is satisfied. - txsrd is applied for a read or a read with autoprecharge command. - txsnr is applied for any command except a read or a read with autoprecharge command. cmd ck t0 t2 t1 tm tn cke t3 t4 t5 odt self refresh t6 nop taofd ck > = txsnr > = txsrd trp* valid tck tch tcl tis tis tis tis tih nop nop v il (ac) v il (ac) v ih (ac) v il (dc) v ih (ac) v il (ac) v ih (dc) self refresh operation - 53 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc power-down is synchronously entered when cke is registered low (along with nop or deselect command). cke is not allowed to go low while mode register or extended mode re gister command time, or read or write operation is in progress. cke is allowed to go low while any of other operations such as row activation, precharge or autoprecharge, or auto-refresh is in progress, but power-dow n idd spec will not be applied until finishing those operations. timi ng diagrams are shown in the following pages with details for en try into power down. the dll should be in a locked state when power-down is ente red. otherwise dll should be reset after exiting power-down mode f or proper read operation. dram desig n guarantees it?s dll in a locked state with an y cke intensive operations as long as dram cont rol- ler complies with dram specifications. following figures show tw o examples of cke intensive applications. in both examples, dra m maintains dll in a locked state throughout the period. power-down tcke ck ck cke dram guarantees all ac and dc timing & voltage specifications and proper dll oper ation with intensive cke operation - 54 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc if power-down occurs when all banks are idle, this mode is referred to as precharge power-down; if power-down occurs when there is a row active in any bank, this mode is referr ed to as active power-down. entering power-down deactivates the input and output buffers, excluding ck, ck , odt and cke. also the dll is di sabled upon entering precharge power- down or slow exit active po wer-down, but the dll is kept enabled during fast exit active power-down. in power-down mode, cke low and a stable clock signal must be maintained at the inputs of the gddr2 sdram, and odt should be in a valid state but all other input signal s are ?don?t care?. cke low must be maintained until tcke has been satisfied. power-down duration is limited by 9 times trefi of the device. the power-down state is synchronously exited when cke is registered high (a long with a nop or deselect command). cke high must be maintained until tcke has been satisf ied. a valid, executable command can be applied with power- down exit latency, txp, txard, or txards, after cke goes high. power-down exit latency is defined at ac spec table of this data sheet. t is t is ck/ck cke command valid nop valid don?t care nop t xp, t xard, enter power-down mode t cke t ih t ih t cke t xards valid t ih exit power-down mode t is t ih t cke t ih valid t is v ih (ac) v ih (dc) v il (dc) v ih (ac) v ih (dc) v il (ac) v ih (dc) v ih (ac) basic power down entry and exit timing diagram - 55 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc ck cmd cke dq dqs cmd cke dq dqs cmd cke dq dqs cmd cke dq dqs rda rda bl=8 pre pre al + bl/2 with trtp = 7.5ns & tras min satisfied al + bl/2 with trtp = 7.5ns & tras min satisfied read with autoprecharge to power down entry ck ck ck start internal precharge al + cl al + cl cke should be kept high until the end of burst operation. al + cl bl=4 cke should be kept high cke should be kept high until the end of burst operation. al + cl t0 tx tx+2 tx+3 tx+4 tx+5 tx+6 t1 t2 tx+1 tx+7 tx+8 tx+9 q q q q q q q q q q q q cke should be kept high unt il the end of burst operation. until the end of burst operation. q q q q q q q q rd bl=4 rd bl=8 read operation starts with a read command and q q q q t0 tx tx+2 tx+3 tx+4 tx+5 tx+6 t1 t2 tx+1 tx+7 tx+8 tx+9 t0 tx tx+2 tx+3 tx+4 tx+5 tx+6 t1 t2 tx+1 tx+7 tx+8 tx+9 t0 tx tx+2 tx+3 tx+4 tx+5 tx+6 t1 t2 tx+1 tx+7 tx+8 tx+9 dqs dqs dqs dqs read to power down entry - 56 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc cmd cke dq dqs cmd cke dq dqs t0 tm+1 tm+3 tx tx+1 tx+2 ty t1 tm tm+2 ty+1 ty+2 ty+3 wr wr bl=8 cmd cke dq dqs cmd cke dq dqs t0 tm+1 tm+3 tx tx+1 tx+2 tx+3 t1 tm tm+2 tx+4 tx+5 tx+6 wra wra bl=8 pre pre d d d d d d d d d d d d twtr twtr wr*1 d d d d d d d d d d d d wr *1 write with autoprecharg e to power down entry ck ck ck ck wl bl=4 bl=4 wl wl wl t0 tm+1 tm+3 tm+4 tm+5 tx tx+1 t1 tm tm+2 tx+2 tx+3 tx+4 ck ck * 1: wr is programmed through mrs t0 tm+1 tm+3 tm+4 tm+5 tx tx+1 t1 tm tm+2 tx+2 tx+3 tx+4 dqs dqs dqs dqs write to power down entry - 57 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc cmd cke cmd cke t0 t3 t5 t6 t7 t8 t9 t1 t2 t4 t10 cmd cke cmd cke cke can go to low one clock after an active command pr or mrs or pra emrs ref act tmrd active command to power down entry precharge/precharge all command to power down entry mrs/emrs command to power down entry ck ck cke can go to low one clock after a precharge or precharge all command cke can go to low one clock after an auto-refresh command t11 dram requires cke to be maintained ?high? for all valid operations as defined in this data shee t. if cke asynchronously drops ? low? during any valid operation dram is not guaran teed to preserve the contents of array. if this event occurs, memory controller mu st sat- isfy dram timing specification tdelay before turning off the clocks. stable clocks must exist at the input of dram before cke i s raised ?high? again. dram must be fully re-initialized (steps 4 thru 13 ) as described in initialization sequence. dram is ready for no rmal oper- ation after the initialization sequence. see ac ti ming parametric table for tdelay specification. asynchronous cke low event refresh command to power down entry tck ck ck# tdelay cke cke asynchronously drops low clocks can be turned off after this point stable clocks tis - 58 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc gddr2 sdram input clock frequency can be changed under following condition : gddr2 sdram is in precharged power down mode. odt must be tu rned off and cke must be at logic low level. a minimum of 2 clocks must be waited after cke goes low before clock frequency may change. sdram input clock frequency is allowed to change only within minimum and maximum operating frequency specified fo r the particular speed grade. during input clock frequency chan ge, odt and cke must be held at stable low leve ls. once input clock frequen cy is changed, stable new clo cks must be provided to dram before precharge power down may be exited and dll must be reset via emrs after precharge power down exit. depending on new clock frequency an additional mrs command may need to be i ssued to appropriately set the wr, cl etc.. during dll re-lock period, odt must remain off. after the dll lock time, the dram is ready to operate with new clock frequency. ck cke t0 t4 tx+1 ty ty+1 ty+2 t1 t2 tx ck valid dll nop 200 clocks frequency change ty+3 tz nop nop nop nop reset trp clock frequency change in precharge power down mode txp occurs here taofd stable new clock before power down exit odt is off during dll reset minimum 2 clocks required before changing frequency odt cmd ty+4 no operation command the no operation command should be used in cases when the gddr2 sdram is in an idle or a wa it state. the purpose of the no operation command (nop) is to preven t the gddr2 sdram from registering any unwanted commands between operations. a no operation command is registered when cs is low with ras , cas , and we held high at the rising edge of the clock. a no operation command will not terminate a previous operation that is still executing, such as a burst read or write cycle. deselect command the deselect command performs the same function as a no operation command. deselect command occurs when cs is brought high at the rising edge of the clock, the ras , cas , and we signals become don?t cares. input clock frequen cy change during precharge power down - 59 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc note : 1. all gddr2 sdram commands are defined by states of cs , ras , cas , we and cke at the rising edge of the clock. 2. bank addresses ba0, ba1, ba2 (ba) determine which bank is to be operated upon. for (e)mrs ba selects an (extended) mode regi ster. 3. burst reads or writes at bl=4 cannot be terminated or inte rrupted. see sections "reads interrupted by a read" and "writes i nterrupted by a write" 4. the power down mode does not perform any refresh operations. t he duration of power down is therefore limited by the refresh requirements outlined. 5. the state of odt does not affect the states described in this table. the odt function is not available during self refresh. 6. ?x? means ?h or l (but a defined logic level)?. 7. self refresh exit is asynchronous. 8. vref must be maintained during self refresh operation. function cke cs ras cas we ba0 ba1 a11 a10 a9 - a0 note previous cycle current cycle (extended) mode register set h h l l l l ba op code 1,2 refresh (ref) h h l l l h x x x x 1 self refresh entry h l l l l h x x x x 1,8 self refresh exit l h hxxx xx x x1,7 lhhh single bank precharge h h l l h l ba x l x 1,2 precharge all banks h h l l h l x x h x 1 bank activate h h l l h h ba row address 1,2 write h h l h l l ba column l column 1,2,3 write with auto precharge h h l h l l ba column h column 1,2,3 read h h l h l h ba column l column 1,2,3 read with auto-precharge h h l h l h ba column h column 1,2,3 no operation h x l h h h x x x x 1 device deselect h x h x x x x x x x 1 power down entry h l hxxx xx x x1,4 lhhh power down exit l h hxxx xx x x1,4 lhhh command truth table - 60 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc note : 1. cke (n) is the logic state of cke at clock edge n; ck e (n?1) was the state of cke at the previous clock edge. 2. current state is the state of the ddr sdram immediately prior to clock edge n. 3. command (n) is the command registered at clock edge n, and action (n) is a result of command (n). 4. all states and sequences not shown are illegal or reserv ed unless explicitly described elsewhere in this document. 5. on self refresh exit deselec t or nop commands must be issued on every clock edge occurring during the t xsnr period. read commands may be issued only after t xsrd (200 clocks) is satisfied. 6. self refresh mode can only be entered from the all banks idle state. 7. must be a legal command as defined in the command truth table. 8. valid commands for power down entry and exit are nop and deselect only. 9. valid commands for self refresh exit are nop and deselect only. 10. power down and self refresh can not be entered while read or write operations, (extended) mode register set operations or p recharge operations are in progress. see section "power down" and "self re fresh command" for a detaile d list of restrictions. 11. minimum cke high time is three clocks.; minimum cke low time is three clocks. 12. the state of odt does not affect the states described in this table. the odt function is not available during self refresh. 13. the power down does not perform any refresh operations. the dur ation of power down mode is therefore limited by the refresh requirements outlined. 14. cke must be maintained high while the sdram is in ocd calibration mode . 15. ?x? means ?don?t care (including floating around vref)? in se lf refresh and power down. however odt must be driven high or low in power down if the odt function is enabled (bit a2 or a6 set to ?1? in emrs(1) ). 16. v ref must be maintained during self refresh operation. current state 2 cke command (n) 3 ras , cas , we , cs action (n) 3 note previous cycle 1 (n-1) current cycle 1 (n) power down l l x maintain power-down 11, 13, 15 l h deselect or nop power down exit 4, 8, 11,13 self refresh l l x maintain self refresh 11, 15 l h deselect or nop self refresh exit 4, 5,9 bank(s) active h l deselect or nop act ive power down entry 4,8,10,11,13 all banks idle h l deselect or nop precharge powe r down entry 4, 8, 10,11,13 h l refresh self refresh entry 6, 9, 11,13 h h refer to the command truth table 7 dm truth table note : 1. used to mask write data, provided coincident with the corresponding data name (functional) dm dqs note write enable - valid 1 write inhibit h x 1 clock enable (cke) truth table for synchronous transitions - 61 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc ac overshoot/undershoot specification for address and control pins a0-a15, ba0-ba2, cs , ras , cas , we , cke, odt ac overshoot/undershoot specification for clock, data, strobe, and mask pins dq, dqs, dm, ck, ck parameter specification - 36 - 2a maximum peak amplitude allowed for over shoot area (see following figyre): 0.9v 0.9v maximum peak amplitude allowed for undershoot area (see following figure): 0.9v 0.9v maximum overshoot area above vdd (see following figure). 0.56 v-ns 0.45 v-ns maximum undershoot area below vss (see following figure). 0.56 v-ns 0.45 v-ns parameter specification - 36 -2a maximum peak amplitude allowed for over shoot area (see following figure): 0.9v 0.9v maximum peak amplitude allowed for undershoot area (see following figure): 0.9v 0.9v maximum overshoot area above vddq (see following figure): 0.28 v-ns 0.23 v-ns maximum undershoot area be low vssq (see fo llowing figure): 0 .28 v-ns 0.23 v-ns overshoot area maximum amplitude v dd undershoot area maximum amplitude v ss volts (v) ac overshoot and undershoot definition for address and control pins time (ns) overshoot area maximum amplitude v ddq undershoot area maximum amplitude v ssq volts (v) ac overshoot and undershoot definition for clock, data, strobe, and mask pins time (ns) input signal overshoot/u ndershoot specification - 62 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc table 1. full strength default pulldown driver characteristics pulldown current (ma) voltage (v) minimum (23.4 ohms) nominal default low (18 ohms) nominal default high(18 ohms) maximum (12.6 ohms) 0.2 8.5 11.3 11.8 15.9 0.3 12.1 16.5 16.8 23.8 0.4 14.7 21.2 22.1 31.8 0.5 16.4 25.0 27.6 39.7 0.6 17.8 28.3 32.4 47.7 0.7 18.6 30.9 36.9 55.0 0.8 19.0 33.0 40.9 62.3 0.9 19.3 34.5 44.6 69.4 1.0 19.7 35.5 47.7 75.3 1.1 19.9 36.1 50.1 80.5 1.2 20.0 36.6 52.2 84.6 1.3 20.1 36.9 54.2 87.7 1.4 20.2 37.1 55.9 90.8 1.5 20.3 37.4 57.1 92.9 1.6 20.4 37.6 58.4 94.9 1.7 20.6 37.7 59.6 97.0 1.8 37.9 60.9 99.1 1.9 101.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 vout to vssq (v) 0 20 40 60 80 100 120 pulldown current (ma) maximum nominal default high nominal default low minimum figure 1. gddr2 default pulldown characte ristics for full strength driver - 63 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc table 2. full strength default pullup driver characteristics pulldown current (ma) voltage (v) minimum (23.4 ohms) nominal default low (18 ohms) nominal default high(18 ohms) maximum (12.6 ohms) 0.2 -8.5 -11.1 -11.8 -15.9 0.3 -12.1 -16.0 -17.0 -23.8 0.4 -14.7 -20.3 -22.2 -31.8 0.5 -16.4 -24.0 -27.5 -39.7 0.6 -17.8 -27.2 -32.4 -47.7 0.7 -18.6 -29.8 -36.9 -55.0 0.8 -19.0 -31.9 -40.8 -62.3 0.9 -19.3 -33.4 -44.5 -69.4 1.0 -19.7 -34.6 -47.7 -75.3 1.1 -19.9 -35.5 -50.4 -80.5 1.2 -20.0 -36.2 -52.5 -84.6 1.3 -20.1 -36.8 -54.2 -87.7 1.4 -20.2 -37.2 -55.9 -90.8 1.5 -20.3 -37.7 -57.1 -92.9 1.6 -20.4 -38.0 -58.4 -94.9 1.7 -20.6 -38.4 -59.6 -97.0 1.8 -38.6 -60.8 -99.1 1.9 -101.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 vddq to vout (v) -120 -100 -80 -60 -40 -20 0 pullup current (ma) minimum nominal default low nominal default high maximum figure 2. gddr2 default pullup characteristics for full strength output driver - 64 - rev 1.5 oct. 2005 512m gddr2 sdram k4n51163qc-zc gddr2 sdram default output driver v?i characteristics gddr2 sdram output driver characteristics are defined for full strength default operation as selected by the emrs1 bits a7-a9 = ?111?. figures 1 and 2 show the driver characteri stics graphically, and tables 1 and 2 show the same data in tabular format suitable f or input into simulation tools. the driver char acteristics evaluation conditions are: nominal default 25 o c (t case), vddq = 1.8 v, typical process minimum tbd o c (t case), vddq = 1.7 v, slow?slow process maximum 0 o c (t case), vddq = 1.9 v, fast?fast process default output driver characteristic curves notes: 1) the full variation in driver current from minimum to maxi mum process, temperature, and vo ltage will lie within the outer bou nding lines of the v?i curve of figures 1 and 2. 2) it is recommended that the ?typical? ibis v?i curve lie withi n the inner bounding lines of the v?i curves of figures 1 and 2 . table 3. full strength calibrated pulldown driver characteristics table 4. full strength calibrated pullup driver characteristics gddr2 sdram calibrated output driver v?i characteristics gddr2 sdram output driver characteristics are defined for full strength calibrated operation as selected by the procedure out lined in off-chip driver (ocd) impedance adjustment. tables 3 and 4 show the data in tabular format suitable for input into simulation t ools. the nominal points represent a device at exactly 18 ohms. the nomi nal low and nominal high values represent the range that can be achieved with a maximum 1.5 ohm step size with no calibration error at the exact nominal conditions only (i.e. perfect calibrat ion proce- dure, 1.5 ohm maximum step size guaranteed by specificatio n). real system calibration error needs to be added to these values. it must be understood that these v-i curves as represented here or in supplier ibis mode ls need to be adjusted to a wider range as a result of any system calibration error. since this is a system specific phenomena, it cannot be quantified here. the values i n the cali- brated tables represent just the dram porti on of uncertainty while looking at one dq only. if the calibration procedure is use d, it is pos- sible to cause the device to operate outside the bounds of the de fault device characteristics tables and figures. in such a si tuation, the timing parameters in the specification cannot be guaranteed. it is solely up to the system application to ensure that the devi ce is cali- brated between the minimum and ma ximum default values at all time s. if this can?t be guaranteed by the system calibration proc edure, re-calibration policy, and uncertainty with dq to dq variation, then it is recommended that onl y the default values be used. t he nominal maximum and minimum values represent the change in impedance from nominal low and high as a result of voltage and temperature change from the nominal condition to the maximum and minimum condit ions. if calibrated at an ex treme condition, the amount of varia- tion could be as much as from the nominal minimum to the nominal maximum or vice versa. the driver characteristics evaluation condi- tions are: nominal 25 o c (t case), vddq = 1.8 v, typical process. nominal low and nominal high 25 o c (t case), vddq = 1.8 v, any process. nominal minimum tbd o c (t case), vddq = 1.7 v, any process. nominal maximum 0 o c (t case), vddq = 1.9 v, any process. calibrated pulldown current (ma) voltage (v) nominal minimum (21 ohms) nominal low (18.75 ohms) nominal (18 ohms) nominal high (17.25 ohms) nominal maximum (15 ohms) 0.2 9.5 10.7 11.5 11.8 13.3 0.3 14.3 16.0 16.6 17.4 20.0 0.4 18.7 21.0 21.6 23.0 27.0 calibrated pulldown current (ma) voltage (v) nominal minimum (21 ohms) nominal low (18.75 ohms) nominal (18 ohms) nominal high (17.25 ohms) nominal maximum (15 ohms) 0.2 -9.5 -10.7 -11.4 -11.8 -13.3 0.3 -14.3 -16.0 -16.5 -17.4 -20.0 0.4 -18.7 -21.0 -21.2 -23.0 -27.0 |
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