View M27W032_1957259.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/23 may 2003 M27W032 32 mbit (2mb x16) 3v supply flexiblerom? memory features summary n one time programmable n supply voltage Cv cc = 2.7 to 3.6v for read Cv pp = 11.4 to 12.6v for program n access time C 90ns at v cc = 3.0 to 3.6v C 100, 110ns at v cc = 2.7 to 3.6v n programming time C 9s per word typical C multiple word programming option (4s typical chip program) n suitable for on-board programming n program controller C embedded word program algorithms n electronic signature C manufacturer code: 0020h C device code : 888eh figure 1. packages tsop48 (n) 12 x 20mm so44 (m)
M27W032 2/23 table of contents features summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 figure 1. packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 figure 2. logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 table 1. signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 figure 3. so connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 4. tsop connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 signal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 address inputs (a0-a20). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 data inputs/outputs (dq0-dq7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 data inputs/outputs (dq8-dq15). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 chip enable (e). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 output enable (g). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 v cc supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 v pp program supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 vss ground.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 bus operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 bus read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 bus write. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 output disable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 automatic standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 electronic signature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 2. bus operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 command interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 read/reset command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 auto select command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 word program command.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 multiple word program command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 setup phase.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 program phase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 verify phase.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 exit phase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 3. standard commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 4. multiple word program command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 5. program times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 figure 5. multiple word program flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3/23 M27W032 status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 data polling bit (dq7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 toggle bit (dq6).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 error bit (dq5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 v pp status bit (dq4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 multiple word program bit (dq0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 multiple word program bit (dq0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 table 6. status register bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 6. data polling flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 7. data toggle flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 maximum rating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 7. absolute maximum ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 dc and ac parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 8. operating and ac measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 8. ac measurement i/o waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 9. ac measurement load circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5 table 9. device capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 10. dc characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 10. read ac waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 table 11. read ac characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 11. chip enable controlled, write ac waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 table 12. chip enable controlled, write ac characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 package mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 so44 - 44 lead plastic small outline, 500 mils body width, package outline . . . . . . . . . . . . . . . . 19 so44 - 44 lead plastic small outline, 500 mils body width, package mechanical data . . . . . . . . . 19 tsop48 - 48 lead plastic thin small outline, 12 x 20mm, package outline . . . . . . . . . . . . . . . . . 20 tsop48 - 48 lead plastic thin small outline, 12 x 20mm, package mechanical data . . . . . . . . . 20 part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 table 15. ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 table 16. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
M27W032 4/23 summary description the M27W032 is a 32 mbit (2mb x16) non-volatile, one time programmable (otp), flexiblerom? memory. read operations can be performed using a single low voltage (2.7 to 3.6v) supply. program operations require an additional v pp (11.4 to 12.6v) power supply. on power-up the memory defaults to read mode where it can be read in the same way as a rom or eprom. program commands are written to the command interface of the memory. an on-chip program con- troller (pc) simplifies the process of programming the memory by taking care of all of the special op- erations that are required to update the memory contents. the M27W032 features an innovative command, multiple word program, used to program large streams of data. it greatly reduces the total pro- gramming time when a large number of words are written to the memory at any one time. using this command the entire memory can be programmed in 4s, compared to 18s using the standard word program. the end of a program operation can be detected and any error conditions identified. the command set required to control the memory is consistent with jedec standards. chip enable and output enable signals control the bus operation of the memory. they allow simple connection to most microprocessors, often without additional logic. the memory is offered in so44 and tsop48 (12 x 20mm) packages. the memory is supplied with all the bits set to 1. figure 2. logic diagram table 1. signal names ai05928 21 a0-a20 dq0-dq15 v cc M27W032 e v ss 16 g v pp a0-a20 address inputs dq0-dq15 data inputs/outputs e chip enable g output enable v cc supply voltage read v pp supply voltage program v ss ground nc not connected internally
5/23 M27W032 figure 3. so connections figure 4. tsop connections g dq0 dq8 a3 a0 e v ss a2 a1 a13 v ss a14 a15 dq7 a12 a16 dq15 dq5 dq2 dq3 v cc dq11 dq4 dq14 a9 a19 nc a4 a7 ai05926 M27W032 8 2 3 4 5 6 7 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 20 19 18 17 dq1 dq9 a6 a5 dq6 dq13 44 39 38 37 36 35 34 33 a11 a10 dq10 21 dq12 40 43 1 42 41 a17 a8 a18 a20 v pp dq3 dq9 dq2 a6 dq0 a3 dq6 a8 a9 dq13 a17 a10 dq14 a2 dq12 dq10 dq15 dq4 dq5 a7 dq7 ai05927 M27W032 12 1 13 24 25 36 37 48 dq8 a19 a1 a18 a4 a5 dq1 dq11 g a12 a13 a16 a11 a15 a14 v ss e a0 nc v pp v ss v cc v ss a20 v ss v cc v ss
M27W032 6/23 signal descriptions see figure 2, logic diagram, and table 1, signal names, for a brief overview of the signals connect- ed to this device. address inputs (a0-a20). the address inputs select the cells in the memory array to access dur- ing bus read operations. during bus write opera- tions they control the commands sent to the command interface of the program controller. data inputs/outputs (dq0-dq7). the data in- puts/outputs output the data stored at the selected address during a bus read operation. during bus write operations they represent the command sent to the command interface of the program controller. when reading the status register they report the status of the ongoing algorithm. data inputs/outputs (dq8-dq15). the data in- puts/outputs output the data stored at the selected address during a bus read operation. during bus write operations the command interface does not use these bits. when reading the status register these bits should be ignored. chip enable (e ). the chip enable, e , activates the memory, allowing bus read operations to be performed. it also controls the bus write opera- tions, when v pp is in the v hh range. output enable (g ). the output enable, g , con- trols the bus read operations of the memory. it also allows bus write operations, when v pp is in the v hh range. v cc supply voltage. the v cc supply voltage supplies the power for read operations. a 0.1f capacitor should be connected between the v cc supply voltage pin and the v ss ground pin to decouple the current surges from the power supply. the pcb track widths must be sufficient to carry the currents required during program opera- tions, i cc3 . v pp program supply voltage. v pp is both a power supply and write protect pin. the two func- tions are selected by the voltage range applied to the pin. when the v pp is in the v hh range (see table 10, dc characteristic, for the relevant values) the pro- gram operation is enabled. during such opera- tions the v pp must be stable in the v hh range. if the v pp is kept under the v hh range, particularly in the voltage range 0 to 3.6v, any program oper- ation is disabled or stopped. note that v pp must not be left floating or uncon- nected as the device may become unreliable. vss ground. the v ss ground is the reference for all voltage measurements.
7/23 M27W032 bus operations there are six standard bus operations that control the device. these are bus read, bus write, out- put disable, standby, automatic standby and electronic signature. see tables 2, bus opera- tions, for a summary. typically glitches of less than 5ns on chip enable or write enable are ig- nored by the memory and do not affect bus opera- tions. bus read. bus read operations read from the memory cells, or specific registers in the com- mand interface. a valid bus read operation in- volves setting the desired address on the address inputs and applying a low signal, v il , to chip en- able and output enable. the data inputs/outputs will output the value, see figure 10, read ac waveforms, and table 11, read ac characteris- tics, for details of when the output becomes valid. bus write. bus write operations write to the command interface. bus write is enabled only when v pp is set to v hh . a valid bus write opera- tion begins by setting the desired address on the address inputs. the address inputs are latched by the command interface on the falling edge of chip enable. the data inputs/outputs are latched by the command interface on the rising edge of chip enable. output enable must remain high, v ih , during the whole bus write operation. see figure 11, write ac waveforms, and table 12, write ac characteristics, for details of the timing require- ments. output disable. the data inputs/outputs are in the high impedance state when output enable is high, v ih . standby. when chip enable is high, v ih , the memory enters standby mode and the data in- puts/outputs pins are placed in the high-imped- ance state. to reduce the supply current to the standby supply current, i cc2 , chip enable should be held within v cc 0.2v. for the standby current level see table 10, dc characteristics. during program operation the memory will contin- ue to use the program supply current, i cc3 , for program operation until the operation completes. automatic standby. if cmos levels (v cc 0.2v) are used to drive the bus and the bus is inactive for 150ns or more the memory enters automatic standby where the internal supply current is re- duced to the standby supply current, i cc2 . the data inputs/outputs will still output data if a bus read operation is in progress. electronic signature. the memory has two codes, the manufacturer code and the device code, that can be read to identify the memory. these codes can be read by applying the signals listed in tables 2, bus operations, once the auto select command is executed. to exit electronic signature mode, the read/reset command must be issued. table 2. bus operations note: 1. x = v il or v ih . 2. xx = v il , v ih or v hh 3. when reading status register during program algorithm execution v pp must be kept at v hh . operation e g v pp address inputs a0-a20 data inputs/outputs dq15-dq0 bus read v il v il xx (3) cell address data output bus write v il v ih v hh command address data input output disable x v ih x x hi-z standby v ih x x x hi-z read manufacturer code v il v il v hh a0 = v il , a1 = v il , others v il or v ih 0020h read device code v il v il v hh a0 = v ih , a1 = v il , others v il or v ih 888eh
M27W032 8/23 command interface all bus write operations to the memory are inter- preted by the command interface. commands consist of one or more sequential bus write oper- ations. failure to observe a valid sequence of bus write operations will result in the memory return- ing to read mode. the long command sequences are imposed to maximize data security. refer to tables 3 and 4, for a summary of the com- mands. read/reset command. the read/reset command returns the memory to its read mode where it behaves like a rom or eprom, unless otherwise stated. it also resets the errors in the status register. either one or three bus write operations can be used to issue the read/reset command. v pp must be set to v hh during the read/reset command. if v pp is set to either v il or v ih the com- mand will be ignored. the command can be is- sued, between bus write cycles before the start of a program operation, to return the device to read mode. once the program operation has started the read/reset command is no longer accepted. auto select command. the auto select command is used to read the manufacturer code and the device code. v pp must be set to v hh during the auto select com- mand. if v pp is set to either v il or v ih the com- mand will be ignored. three consecutive bus write operations are required to issue the auto se- lect command. once the auto select command is issued the memory remains in auto select mode until a read/reset command is issued, all other commands are ignored. from the auto select mode the manufacturer code can be read using a bus read operation with a0 = v il and a1 = v il . the other address bits may be set to either v il or v ih . the device code can be read using a bus read operation with a0 = v ih and a1 = v il . the other address bits may be set to either v il or v ih . word program command. the word program command can be used to pro- gram a word to the memory array. v pp must be set to v hh during word program. if v pp is set to ei- ther v il or v ih the command will be ignored, the data will remain unchanged and the device will re- vert to read/reset mode. the command requires four bus write operations, the final write operation latches the address and data in the internal state machine and starts the pc. during the program operation the memory will ig- nore all commands. it is not possible to issue any command to abort or pause the operation. typical program times are given in table 5. bus read op- erations during the program operation will output the status register on the data inputs/outputs. see the section on the status register for more details. after the program operation has completed the memory will return to the read mode, unless an error has occurred. when an error occurs the memory will continue to output the status regis- ter. a read/reset command must be issued to re- set the error condition and return to read mode. note that the program command cannot change a bit set at 0 back to 1. multiple word program command the multiple word program command can be used to program large streams of data. it greatly reduces the total programming time when a large number of words are written in the memory at once. v pp must be set to v hh during multiple word program. if v pp is set either v il or v ih the com- mand will be ignored, the data will remain un- changed and the device will revert to read mode. it has four phases: the setup phase to initiate the command, the program phase to program the data to the memory, the verify phase to check that the data has been correctly programmed and re- program if necessary and the exit phase. setup phase. the multiple word program com- mand requires three bus write operations to ini- tiate the command (refer to table 4, multiple word program command and figure 8, multiple word program flowchart). the status register must be read in order to check that the pc has started (see table 6 and figure 6). program phase. the program phase requires n+1 bus write operations, where n is the number of words, to execute the programming phase (re- fer to table 4, multiple word program and figure 5, multiple word program flowchart). before any bus write operation of the program phase, the status register must be read in order to check that the pc is ready to accept the opera- tion (see table 6 and figure 6). the program phase is executed in three different sub-phases: 1. the first bus write operation of the program phase (the 4th of the command) latches the start address and the first word to be programmed. 2. each subsequent bus write operation latches the next word to be programmed and automatically increments the internal address bus. it is not necessary to provide the address of the location to be programmed but only a continue address, ca (a17 to a20 equal to the
9/23 M27W032 start address), that indicates to the pc that the program phase has to continue. a0 to a16 are dont care. 3. finally, after all words have been programmed, a bus write operation (the (n+1) th ) with a final address, fa (a17 or a higher address pin different from the start address), ends the program phase. the memory is now set to enter the verify phase. verify phase. the verify phase is similar to the program phase in that all words must be resent to the memory for them to be checked against the programmed data. before any bus write operation of the verify phase, the status register must be read in order to check that the pc is ready for the next operation or if the reprogram of the location has failed (see table 6 and figure 6). three successive steps are required to execute the verify phase of the command: 1. the first bus write operation of the verify phase latches the start address and the word to be verified. 2. each subsequent bus write operation latches the next word to be verified and automatically increments the internal address bus. as in the program phase, it is not necessary to provide the address of the location to be programmed but only a continue address, ca (a17 to a20 equal to the start address). 3. finally, after all words have been verified, a bus write cycle with a final address, fa (a17 or a higher address pin different from the start address) ends the verify phase. exit phase. after the verify phase ends, the sta- tus register must be read to check if the command has successfully completed or not (see table 6 and figure 6). if the verify phase is successful, the memory re- turns to read mode and dq6 stops toggling. if the pc fails to reprogram a given location, the verify phase terminates, dq6 continues toggling and error bit dq5 is set in the status register. if the error is due to a v pp failure dq4 is also set. when the operation fails a read/reset command must be issued to return the device to read mode. during the multiple word program operation the memory will ignore all commands. it is not possible to issue any command to abort or pause the oper- ation. typical program times are given in table 5. bus read operations during the program opera- tion will output the status register on the data in- puts/outputs. see the section on the status register for more details. note that the multiple word program command cannot change a bit set to 0 back to 1.
M27W032 10/23 table 3. standard commands note: x dont care, pa program address, pd program data. all values in the table are in hexadecimal. the command interface only uses a0-a10 and dq0-dq7 to verify the commands; a11-a20, dq8-dq15 are dont care. table 4. multiple word program command note: a bus read must be done between each write cycle where the data is programmed or verified, to read the status register and check that the memory is ready to accept the next data. sa is the start address. ca is the continue address. fa is the final address. x dont care, n = number of words to be programmed. table 5. program times note: 1. t a = 25c, v pp = 12v. command length bus write operations 1st 2nd 3rd 4th add data add data add data add data read/reset 1x f0 3 555 aa 2aa 55 x f0 auto select 3 555 aa 2aa 55 555 90 word program 4 555 aa 2aa 55 555 a0 pa pd phase length bus write operations 1st 2nd 3rd 4th 5th nth final add data add data add data add data add data add data add data set-up 3 555 aa 2aa 55 555 20 program n+1 sa pd1 ca pd2 ca pd3 ca pd4 ca pd5 ca pan fa x verify n+1 sa pd1 ca pd2 ca pd3 ca pd4 ca pd5 ca pan fa x parameter typ (1) max unit program (word) 9 200 s chip program (multiple word) 4 70 s chip program (word by word) 18 70 s
11/23 M27W032 figure 5. multiple word program flowchart write aah address 555h ai05954b start read status register yes no dq0 = 0? write 55h address 2aah write 20h address 555h write data1 start address write data 2 continue address yes no read status register write data n continue address yes no read status register write xx final address read status register no write data1 start address write data 2 continue address no read status register write data n continue address read status register write xx final address yes write f0h address xx exit (read mode) dq0 = 0? dq0 = 0? dq0 = 0? dq0 = 0? dq0 = 0? read status register no dq6 toggling? dq4 = 0? yes fail, v pp error no program phase yes no dq0 = 0? yes setup time exceeded? exit ( setup failed ) no dq0 = 0? read status register no yes yes no dq5 = 1? yes no dq5 = 1? yes dq6 toggling? read status register no yes yes no fail error yes no setup phase verify phase exit phase read status register dq5 = 1 ?
M27W032 12/23 status register bus read operations from any address always read the status register during program opera- tions. the bits in the status register are summa- rized in table 6, status register bits. data polling bit (dq7). the data polling bit can be used to identify whether the program controller has successfully completed its operation. the data polling bit is output on dq7 when the status register is read. during a word program operation the data polling bit outputs the complement of the bit being pro- grammed to dq7. after successful completion of the word program operation the memory returns to read mode and bus read operations from the address just programmed output dq7, not its com- plement. figure 6, data polling flowchart, gives an exam- ple of how to use the data polling bit. a valid ad- dress is the address being programmed. toggle bit (dq6). the toggle bit can be used to identify whether the program controller has suc- cessfully completed its operation. the toggle bit is output on dq6 when the status register is read. during program operations the toggle bit chang- es from 0 to 1 to 0, etc., with successive bus read operations at any address. after successful completion of the operation the memory returns to read mode. figure 7, data toggle flowchart, gives an exam- ple of how to use the data toggle bit. error bit (dq5). the error bit can be used to identify errors detected by the program controller. the error bit is set to 1 when a program opera- tion fails to write the correct data to the memory. if the error bit is set a read/reset command must be issued before other commands are issued. the error bit is output on dq5 when the status regis- ter is read. note that the program command cannot change a bit set to 0 back to 1 and attempting to do so will set dq5 to 1. a bus read operation to that ad- dress will show the bit is still 0. v pp status bit (dq4). the v pp status bit can be used to identify if any program operation has failed due to a v pp error. if v pp falls below v hh during any program operation, the operation aborts and dq4 is set to 1. if v pp remains at v hh throughout the program operation, the operation completes and dq4 is set to 0. multiple word program bit (dq0). the multiple word program bit can be used to indicate whether the program controller is active or inactive during multiple word program. when the program con- troller has written one word and is ready to accept the next word, the bit is set to 0. status register bit dq1 is reserved.
13/23 M27W032 table 6. status register bits note: 1. unspecified data bits should be ignored. 2. dq4 = 0 if v pp 3 v hh during program algorithm execution; dq4 = 1 if v pp < v hh during program algorithm execution. figure 6. data polling flowchart figure 7. data toggle flowchart command (1) p.c. status dq7 dq6 dq5 dq4 dq3 dq0 multiple word program programming C toggle 0 C 0 1 waiting for data C toggle 0 C 0 0 program fail C toggle 1 (2) 01 word program programming dq7 toggle 0 C 0 C program error dq7 toggle 1 (2) 0C read dq5 & dq7 at valid address start read dq7 at valid address fail pass ai03598 dq7 = data yes no yes no dq5 = 1 dq7 = data yes no read dq6 start read dq6 twice fail pass ai01370b dq6 = toggle no no yes yes dq5 = 1 no yes dq6 = toggle read dq5 & dq6
M27W032 14/23 maximum rating stressing the device above the rating listed in the absolute maximum ratings" table may cause per- manent damage to the device. exposure to abso- lute maximum rating conditions for extended periods may affect device reliability. these are stress ratings only and operation of the device at these or any other conditions above those indicat- ed in the operating sections of this specification is not implied. refer also to the stmicroelectronics sure program and other relevant quality docu- ments. table 7. absolute maximum ratings note: 1. minimum voltage may undershoot to C2v for less than 20ns during transitions. 2. maximum voltage may overshoot to v cc +2v for less than 20ns during transitions. 3. maximum voltage may overshoot to 14.0v for less than 20ns during transitions. v pp must not remain at v hh for more than a total of 80hrs. symbol parameter min max unit t bias temperature under bias C50 125 c t stg storage temperature C65 150 c v io input or output voltage (1,2) C0.6 v cc +0.6 v v cc read supply voltage C0.6 4 v v pp program supply voltage (3) C0.6 13.5 v
15/23 M27W032 dc and ac parameters this section summarizes the operating measure- ment conditions, and the dc and ac characteris- tics of the device. the parameters in the dc and ac characteristics tables that follow, are derived from tests performed under the measurement conditions summarized in table 8, operating and ac measurement conditions. designers should check that the operating conditions in their circuit match the operating conditions when relying on the quoted parameters. table 8. operating and ac measurement conditions figure 8. ac measurement i/o waveform figure 9. ac measurement load circuit table 9. device capacitance note: sampled only, not 100% tested. parameter M27W032 unit 100, 110 min max v cc read supply voltage 2.7 3.6 v v pp program supply voltage 11.4 12.6 v ambient operating temperature 0 70 c load capacitance (c l ) 30 pf input rise and fall times 10 ns input pulse voltages 0 to 3 v input and output timing ref. voltages 1.5 v ai05546 3v 0v 1.5v ai05447 1.3v out c l c l = 30pf c l includes jig capacitance 3.3k w 1n914 device under test symbol parameter test condition min max unit c in input capacitance v in = 0v 6pf c out output capacitance v out = 0v 12 pf
M27W032 16/23 table 10. dc characteristics note: 1. v cc must be applied simultaneously or before v pp and removed simultaneously or after v pp . 2. average value. symbol parameter (1) test condition min max unit i li input leakage current 0v v in v cc 1 a i lo output leakage current 0v v out v cc 1 a i cc1 supply current (read) e = v il , g = v ih , i out = 0ma, f = 6mhz 10 ma i cc2 (2) supply current (standby) e = v cc 0.2v 100 a i cc3 supply current (program) pc active 20 ma v il input low voltage C0.5 0.8 v v ih input high voltage 0.7v cc v cc +0.3 v v ol output low voltage i ol = 1.8ma 0.45 v v oh output high voltage i oh = C100 a v cc C0.4 v v hh v pp program voltage 11.4 12.6 v i hh v pp current (program) pc active 10 ma
17/23 M27W032 figure 10. read ac waveforms table 11. read ac characteristics note: 1. v pp must be applied after v cc and with the chip enable (e ) at v ih . 2. sampled only, not 100% tested. symbol alt parameter (1) test condition M27W032 unit 100 110 v cc = 3.0 to 3.6v v cc = 2.7 to 3.6v v cc = 2.7 to 3.6v t avqv t acc address valid to output valid e = v il , g = v il max 90 100 110 ns t elqv t ce chip enable low to output valid g = v il max 90 100 110 ns t glqv t oe output enable low to output valid e = v il max353535ns t ehqz (2) t hz chip enable high to output hi-z g = v il max303030ns t ghqz (2) t df output enable high to output hi-z e = v il max303030ns t axqx t oh address transition to output transition min 0 0 0 ns ai05929 tavqv taxqx tehqz tglqv valid a0-a20 g dq0-dq15 e telqv tghqz valid
M27W032 18/23 figure 11. chip enable controlled, write ac waveforms table 12. chip enable controlled, write ac characteristics note: 1. t a = 25c; v pp = 11.4 to 12.6v. v cc = 2.7 to 3.6v. v pp must be applied after v cc and with the chip enable (e ) at v ih . sampled only, not 100% tested. 2. not required in auto select or read/reset command sequences. symbol alt parameter (1) M27W032 unit t eleh t cp chip enable low to chip enable high min 50 ns t dveh t ds input valid to chip enable high min 50 ns t ehdx t dh chip enable high to input transition min 0 ns t ehel t cph chip enable high to chip enable low min 50 ns t ave l t as address valid to chip enable low min 0 ns t elax t ah chip enable low to address transition min 100 ns t ghel output enable high chip enable low min 10 ns t ehgl t oeh chip enable high to output enable low min 10 ns t vchel t vcs v cc high to chip enable low min 50 s t vphel (2) t vcs v pp high to chip enable low min 500 ns ai05930 e g a0-a20 dq0-dq15 valid valid v cc tvchel tehel tavel tehgl telax tehdx tdveh teleh tghel v pp tvphel
19/23 M27W032 package mechanical figure 12. so44 - 44 lead plastic small outline, 500 mils body width, package outline note: drawing is not to scale. table 13. so44 - 44 lead plastic small outline, 500 mils body width, package mechanical data symbol millimeters inches typ min max typ min max a 3.00 0.118 a1 0.10 0.004 a2 2.69 2.56 2.79 0.106 0.101 0.110 b 0.35 0.50 0.014 0.020 c 0.18 0.28 0.007 0.011 d 28.50 28.37 28.63 1.122 1.117 1.127 ddd 0.10 0.004 e 16.03 15.77 16.28 0.631 0.621 0.641 e1 12.60 12.47 12.73 0.496 0.491 0.501 e 1.27 C C 0.050 C C l 0.79 0.031 l1 1.73 0.068 q 8 8 n44 44 e1 44 e d c e 1 22 23 b so-f l a1 a ddd a2 q l1
M27W032 20/23 figure 13. tsop48 - 48 lead plastic thin small outline, 12 x 20mm, package outline note: drawing is not to scale. table 14. tsop48 - 48 lead plastic thin small outline, 12 x 20mm, package mechanical data symbol millimeters inches typ min max typ min max a 1.20 0.0472 a1 0.05 0.15 0.0020 0.0059 a2 0.95 1.05 0.0374 0.0413 b 0.17 0.27 0.0067 0.0106 c 0.10 0.21 0.0039 0.0083 cp 0.10 0.0039 d 19.80 20.20 0.7795 0.7953 d1 18.30 18.50 0.7205 0.7283 e 11.90 12.10 0.4685 0.4764 e 0.50 C C 0.0197 C C l 0.50 0.70 0.0197 0.0276 a 0 5 0 5 n48 48 tsop-a d1 e 1 n cp b e a2 a n/2 d die c l a1 a
21/23 M27W032 part numbering table 15. ordering information scheme note: 1. this speed also guarantees 90ns access time at v cc = 3.0 to 3.6v. devices are shipped from the factory with all the bits set to 1. for a list of available options (speed, package, etc...) or for further information on any aspect of this de- vice, please contact the st sales office nearest to you. example: M27W032 100 n 1 t device type m27 = flexiblerom ? memory operating voltage w = v cc = 2.7 to 3.6v device function 032 = 32 mbit (x16) speed 100 = 100 ns (1) 110 = 110 ns package m = so44, 500mils body width n = tsop48: 12 x 20 mm temperature range 1 = 0 to 70 c option t = tape & reel packing
M27W032 22/23 revision history table 16. document revision history date version revision details 28-jun-2002 1.0 first issue 09-jul-2002 2.0 100ns speed class added (90ns at v cc = 3.0 to 3.6v) product name changed 02-aug-2002 2.1 multiple word program command table clarified (table 4) i cc1 , i cc2 clarified (table 10) 27-sep-2002 2.2 product naming revised 28-nov-2002 2.3 otp specification added so44 package changed to 500mils body width bus operation table clarified (table 2) read/reset, auto select and multiple word program commands clarified 90ns speed class obtained from the 100ns at v cc = 3.0 to 3.6v - clarification (table 11 and 12) 19-dec-2002 2.4 document maturity changed to preliminary data 21-jan-2003 2.5 tsop connections diagram updated (figure 4) 20-feb-2003 2.6 tsop connections diagram changed back as in version 2.4 (figure 4) 09-may-2003 2.7 document maturity changed to data sheet
23/23 M27W032 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics flexiblerom is a pending trademark of stmicroelectronics all other names are the property of their respective owners ? 2003 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco - singapore - spain - sweden - switzerland - united kingdom - united states www.st.com

▲Up To Search▲

Price & Availability of M27W032

	To Download M27W032 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .