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1 zarlink semiconductor inc. zarlink, zl and the zarlink semiconductor logo are trademarks of zarlink semiconductor inc. copyright 2006, zarlink semiconductor inc. all rights reserved. a full design manual is available to qualified customers. to register, please send an email to timingandsync@zarlink.com. features ? synchronizes with standard telecom system references and synthesizes a wide variety of protected telecom line interface clocks that are compliant with telcordia gr-1244-core, gr-253- core, itu-t g.813, and compatible with itu-t g.8261 (formerly g.pactiming) ? internal low jitter apll provides sonet/sdh clocks including 6.48 mhz, 19.44 mhz, 38.88 mhz, 51.84 mhz and 77.76 mhz, or 25 mhz and 50 mhz synchronous ethernet output clocks ? programmable output synthesizers (p0, p1) generate general purpose clock frequencies from any multiple of 8 khz up to 100 mhz ? jitter performance of <8 ps rms on the low jitter apll outputs, and <20 ps rms on the programmable synthesizer outputs. ? provides 8 reference inputs which support clock frequencies with any multiples of 8 khz up to 77.76 mhz in addition to 2 khz ? provides two dplls which have independent modes of operation (locked, free-run, holdover) and optional hitless reference switching. ? flexible input reference monitoring automatically disqualifies references based on frequency and phase irregularities ? provides 3 sync inputs for output frame pulse alignment ? generates several styles of output frame pulses with selectable pulse width, polarity, and frequency ? configurable input to output delay, and output to output phase alignment ? supports ieee 1149.1 jtag boundary scan may 2006 figure 1 - block diagram dpll1_mod_sel1:0 tck tdo tdi tms trst_b dpll1_holdover dpll1_lock dpll2 sck so si dpll1 dpll2_ref rst_b dpll1_hs_en cs_b reference monitors ref sync ref ref0 ref1 ref2 ref3 ref4 ref5 ref6 ref7 sync0 sync1 sync2 int_b apll_clk0 apll_clk1 apll_fp0 apll_fp1 p0_clk0 p0_clk1 p0_fp0 p0_fp1 p1_clk0 p1_clk1 fb_clk ref7:0 sync2:0 ref_&_sync_status controller & state machine spi interface low jitter apll p0 synthesizer p1 synthesizer feedback synthesizer ieee 1449.1 jtag master clock osco osci fb_clk/fp apll_filter filter_ref0 filter_ref1 zl30120 sonet/sdh/ethernet multi-rate line card synchronizer data sheet ordering information zl30120ggg 100 pin cabga trays ZL30120GGG2 100 pin cabga** trays **pb free tin/silver/copper -40 o c to +85 o c
zl30120 data sheet 2 zarlink semiconductor inc. applications ? amcs for advancedtca tm and microtca systems ? synchronous ethernet ? multi-service edge switches or routers ? dslam line cards ? wan line cards ? rnc/mobile switching center line cards ? adm line cards
zl30120 data sheet table of contents 3 zarlink semiconductor inc. 1.0 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.1 dpll features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.2 dpll mode control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 1.3 ref and sync inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.4 ref and sync monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.5 output clocks and frame pulses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1.6 configurable input-t o-output and output-to-out put delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.0 software configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.0 references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
zl30120 data sheet list of figures 4 zarlink semiconductor inc. figure 1 - block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 figure 2 - automatic mode state machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 3 - reference and sync inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 4 - output frame pulse alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 5 - behaviour of the guard soak ti mer during cfm or scm failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 6 - output clock configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 7 - phase delay adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
zl30120 data sheet list of tables 5 zarlink semiconductor inc. table 1 - dpll1 and dpll2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 2 - set of pre-defined auto-detect clock frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 3 - set of pre-defined auto-detect sync frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 4 - output clock and frame pulse frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
zl30120 data sheet 6 zarlink semiconductor inc. pin description pin # name i/o type description input reference c1 b2 a3 c3 b3 b4 c4 a4 ref0 ref1 ref2 ref3 ref4 ref5 ref6 ref7 i d input references (lvcmos, schmitt trigger). these are input references available to both dpll1 and dpll2 fo r synchronizing output clocks. all eight input references can be automatically or manually selected using software registers. these pins are internally pulled down to vss. b1 a1 a2 sync0 sync1 sync2 i d frame pulse synchronization references (lvcmos, schmitt trigger). these are the frame pulse synchroniz ation inputs associated with input references 0, 1 and 2. these inputs acc ept frame pulses in a clock format (50% duty cycle) or a basic frame pulse form at with minimum pulse width of 5 ns. these pins are internally pulled down to v ss. output clocks and frame pulses d10 apll_clk0 o apll output clock 0 (lvcmos). this output can be c onfigured to provide any one of the available sonet/sdh clock ou tputs up to 77.76 mhz, or 25 mhz and 50 mhz. the default frequency for this output is 77.76 mhz. g10 apll_clk1 o apll output clock 1 (lvcmos). this output can be c onfigured to provide any one of the available sonet/apll clock outputs up to 77.76 mhz, or 25 mhz and 50 mhz. the default frequency for this output is 19.44 mhz. e10 apll_fp0 o apll output frame pulse 0 (lvcmos). this output can be configured to provide virtually any style of output fr ame pulse synchronized with an associated apll output clock. the default frequency for this frame pulse output is 8 khz. f10 apll_fp1 o apll output frame pulse 1 (lvcmos). this output can be configured to provide virtually any style of output fr ame pulse synchronized with an associated apll output clock. the default frequency for this frame pulse output is 2 khz. k9 p0_clk0 o programmable synthesizer 0 - output clock 0 (lvcmos). this output can be configured to provide any frequency with a multiple of 8 khz up to 100 mhz in addition to 2 khz. the default frequency for this output is 2.048 mhz. k7 p0_clk1 o programmable synthesizer 0 - output clock 1 (lvcmos). this is a programmable clock output configurable as a multiple or division of the p0_clk0 frequency within the range of 2 khz to 100 mhz. the default frequency for this output is 8.192 mhz. k8 p0_fp0 o programmable synthesizer 0 - ou tput frame pulse 0 (lvcmos). this output can be configured to provide virtually an y style of output fr ame pulse associated with the p0 clocks. the default frequenc y for this frame pulse output is 8 khz. j7 p0_fp1 o programmable synthesizer 0 - ou tput frame pulse 1 (lvcmos). this output can be configured to provide virtually an y style of output fr ame pulse associated with the p0 clocks. the default frequenc y for this frame pulse output is 8 khz.
zl30120 data sheet 7 zarlink semiconductor inc. j10 p1_clk0 o programmable synthesizer 1 - output clock 0 (lvcmos). this output can be configured to provide any frequency with a multiple of 8 khz up to 100 mhz in addition to 2 khz. the default frequency for this output is 1.544 mhz (ds1). k10 p1_clk1 o programmable synthesizer1 - output clock 1 (lvcmos). this is a programmable clock output configurable as a multiple or division of the p1_clk0 frequency within the range of 2 khz to 100 mhz. the default frequency for this output is 3.088 mhz (2x ds1). h10 fb_clk o feedback clock (lvcmos). this output is a buffered copy of the feedback clock for dpll1. the frequency of this ou tput always equals the frequency of the selected reference. e1 dpll2_ref o dpll2 selected output reference (lvcmos). this is a buffered copy of the output of the reference selector for dp ll2. switching between input reference clocks at this output is not hitless. control h5 rst_b i reset (lvcmos, schmitt trigger). a logic low at this input resets the device. to ensure proper operation, the device must be reset after power-up. reset should be asserted for a minimum of 300 ns. j5 dpll1_hs_en i u dpll1 hitless switching enable (lvcmos, schmitt trigger). a logic high at this input enables hitless reference sw itching. a logic low disables hitless reference switching and re-aligns dpll1? s output phase to the phase of the selected reference input. this feature can also be controlled through software registers. this pin is in ternally pulled up to vdd. c2 d2 dpll1_mod_sel0 dpll1_mod_sel1 i u dpll1 mode select 1:0 (lvcmos, schmitt trigger). during reset, the levels on these pins determine the default mode of operation for dpll1 (automatic, normal, holdover or freerun). after reset, the mode of operation can be controlled directly with thes e pins, or by accessing the dpll1_modesel register through the serial interface. this pin is internally pulled up to vdd. status h1 dpll1_lock o lock indicator (lvcmos). this is the lock indicator pin for dpll1. this output goes high when dpll1?s output is frequency and phase locked to the input reference. j1 dpll1_holdover o holdover indicator (lvcmos). this pin goes high when dpll1 enters the holdover mode. serial interface e2 sck i clock for serial interface (lvcmos). serial interface clock. f1 si i serial interface input (lvcmos). serial interface data input pin. g1 so o serial interface output (lvcmos). serial interface data output pin. e3 cs_b i u chip select for serial interface (lvcmos). serial interface chip select. this pin is internally pulled up to vdd. pin # name i/o type description
zl30120 data sheet 8 zarlink semiconductor inc. g2 int_b o interrupt pin (lvcmos). indicates a change of devi ce status prompting the processor to read the enabled interrupt se rvice registers (isr). this pin is an open drain, active low and requires an external pulled up to vdd. apll loop filter a6 apll_filter a external analog pll loop filter terminal. b6 filter_ref0 a analog pll external loop filter reference. c6 filter_ref1 a analog pll external loop filter reference. jtag and test j4 tdo o test serial data out (output). jtag serial data is output on this pin on the falling edge of tck. this pin is held in high impedance state when jtag scan is not enabled. k2 tdi i u test serial data in (input). jtag serial test instructions and data are shifted in on this pin. this pin is internally pulled up to vdd. if this pin is not used then it should be left unconnected. h4 trst_b i u test reset (lvcmos). asynchronously initializes the jtag tap controller by putting it in the test-logi c-reset state. this pin should be pulsed low on power- up to ensure that the device is in the normal functional state. this pin is internally pulled up to vdd. if this pin is not used then it should be connected to gnd. k3 tck i test clock (lvcmos): provides the clock to the jtag te st logic. if this pin is not used then it should be pulled down to gnd. j3 tms i u test mode select (lvcmos). jtag signal that controls the state transitions of the tap controller. this pin is internally pulled up to v dd . if this pin is not used then it should be left unconnected. master clock k4 osci i oscillator master clock input (lvcmos). this input accepts a 20 mhz reference from a clock oscillator (tcxo, ocxo). the stability and accuracy of the clock at this input determines t he free-run accuracy and the long term holdover stability of the output clocks. k5 osco o oscillator master clock output (lvcmos). this pin must be left unconnected when the osci pin is connected to a clock oscillator. miscellaneous a9 a10 b5 b9 b10 c5 d1 d3 g3 nc no connection. leave unconnected. pin # name i/o type description
zl30120 data sheet 9 zarlink semiconductor inc. j2 j6 h7 k1 ic internal connection. connect to ground. f2 f3 k6 ic internal connection. leave unconnected. power and ground d9 e4 g8 g9 j8 j9 h6 h8 v dd p p p p p p p p positive supply voltage. +3.3v dc nominal. e8 f4 v core p p positive supply voltage. +1.8v dc nominal. a5 a8 c10 av dd p p p positive analog supply voltage. +3.3v dc nominal. b7 b8 h2 av core p p p positive analog supply voltage. +1.8v dc nominal. d4 d5 d6 d7 e5 e6 e7 f5 f6 f7 g4 g5 g6 g7 e9 f8 f9 h9 v ss g g g g g g g g g g g g g g g g g g ground. 0 volts. pin # name i/o type description
zl30120 data sheet 10 zarlink semiconductor inc. i - input i d - input, internally pulled down i u - input, internally pulled up o - output a - analog p - power g - ground a7 c7 c8 c9 d8 h3 av ss g g g g g g analog ground. 0 volts. pin # name i/o type description
zl30120 data sheet 11 zarlink semiconductor inc. 1.0 functional description the zl30120 multi-rate line card synchronizer is a highly integrated device that provides timing and synchronization for network interface cards. it incorporat es two independent dplls, each capable of locking to one of eight input references and prov ides a wide variety of synchronized output clocks and frame pulses. 1.1 dpll features the zl30120 provides two independently controlled digital phase-locked loops (dpll1, dpll2) for clock and/or frame pulse synchronization. dpll1 is the main dpll and is always enabled. to save on power, dpll2 is disabled by default. for applications where dpll2 is required, it must be enabled using the dpll_en bit of the dpll2_ctrl_0 register (0x2a). table 1 shows a feature summary for both dplls. feature dpll1 dpll2 modes of operation free-run, normal (locked) , holdover free-run, normal (locked), holdover loop bandwidth user selectable: 14 hz, 28 hz, or wideband 1 (890 hz / 56 hz / 14 hz) 1. in the wideband mode, the loop bandwidth depends on the frequency of the reference input. for reference frequencies equal to or greater than 64 khz, the loop bandwidth = 890 hz. for reference frequencies equal to or greater than 8 khz and less than 64 khz, t he loop bandwidth = 56 hz. for reference frequencies equal to 2 khz, the loop bandwidth is equal to 14 hz. fixed: 14 hz phase slope limiting user selectable: 885 ns/s, 7.5 s/s, 61 s/s, or unlimited user selectable: 61 s/s, or unlimited pull-in range fixed: 130 ppm fixed: 130 ppm holdover parameters selectable update times: 26 ms, 1 s, 10 s, 60 s, and selectable holdover post filter bw: 18 mhz, 2.5 hz, 10 hz. fixed update time: 26 ms no holdover post filtering holdover frequency accuracy better than 1 ppb (stratum 3e) initial frequency offset. frequency drift depends on the 20 mhz external oscillator. better than 50 ppb (stratum 3) initial frequency offset. frequency drift depends on the 20 mhz external oscillator. reference inputs ref0 to ref7 ref0 to ref7 sync inputs sync0, sync1, sync2 sync inputs are not supported. input reference selection/switching automatic (based on programmable priority and revertiveness), or manual automatic (based on programmable priority and revertiveness), or manual hitless ref switching can be enabled or disabled can be enabled or disabled output clocks apll_clk0, apll_clk1, p0_clk0, p0_clk1, p1_clk0, p1_clk1, fb_clk. p0_clk0, p0_clk1, p1_clk0, p1_clk1. output frame pulses apll_fp0, apll_fp1, p0_fp0, p0_fp1 synchronized to active sync reference. p0_fp0, p0_fp1 not synchronized to sync reference. external pins status indicators lock, holdover none table 1 - dpll1 and dpll2 features
zl30120 data sheet 12 zarlink semiconductor inc. 1.2 dpll mode control both dpll1 and dpll2 independently support three modes of operation - free-run, normal and holdover. the mode of operation can be manually set or controlled by an automatic state machine as shown in figure 2. figure 2 - automatic mode state machine free-run the free-run mode occurs immediately after a reset cycl e or when the dpll has never been synchronized to a reference input. in this mode, the frequency accuracy of th e output clocks is equal to the frequency accuracy of the external master oscillator. lock acquisition the input references are continuously monitored for frequen cy accuracy and phase regularity. if at least one of the input references is qualified by the refe rence monitors, then the dpll will begi n lock acquisition on that input. given a stable reference input, the zl30120 will enter in the normal (locked) mode. normal (locked) the usual mode of operation for the dpll is the normal mode where the dpll phase locks to a selected qualified reference input and generates output cl ocks and frame pulses with a frequency accuracy equal to the frequency accuracy of the reference input. while in the normal m ode, the dpll?s clock and frame pulse outputs comply with the mtie and tdev wander generation spec ifications as described in telc ordia and itu-t telecommunication standards. holdover when the dpll operating in the normal mode loses its refe rence input, and no other qualified references are available, it will enter the holdover mode and continue to generate output clocks based on historical frequency data collected while the dpll was synchronized. reset another reference is qualified and available for selection phase lock on the selected reference is achieved lock acquisition normal (locked) no references are qualified and available for selection free-run holdover selected reference fails all references are monitored for frequency accuracy and phase regularity, and at least one reference is qualified. normal (locked)
zl30120 data sheet 13 zarlink semiconductor inc. 1.3 ref and sync inputs there are eight reference clock inputs ( ref0 to ref7 ) available to both dpll1 and dpll2. the selected reference input is used to synchronize the output clocks. each of the dplls have independent reference selectors which can be controlled using a built-in stat e machine or set in a manual mode. figure 3 - reference and sync inputs in addition to the reference inputs, dpll1 has th ree optional frame pulse synchronization inputs ( sync0 to sync2 ) used to align the output frame pulses. the sync n input is selected with its corresponding ref n input, where n = 0, 1, or 2. note that the sync input cannot be used to sync hronize the dpll, it only det ermines the alignment of the frame pulse outputs. an example of output frame pulse alignment is shown in figure 4. figure 4 - output frame pulse alignment ref7:0 sync2:0 dpll2 dpll1 ref n apll/p0/p1_clk x apll/p0_fp x without a frame pulse signal at the sync input, the output frame pulses will align to any arbitrary cycle of its associated output clock. sync n - no frame pulse signal present when a frame pulse signal is present at the sync input, the dpll will align the output frame pulses to the output clock edge that is aligned to the input frame pulse. ref n apll/p0/p1_clk x apll/p0_fp x sync n n = 0, 1, 2 x = 0, 1 n = 0, 1, 2 x = 0, 1
zl30120 data sheet 14 zarlink semiconductor inc. each of the ref inputs accept a single-ended lvcmos clock wi th a frequency ranging from 2 khz to 77.76 mhz. built-in frequency detection circuitry aut omatically determines the frequency of the reference if its frequency is within the set of pre-defined frequencies as shown in table 2. custom frequencies definable in multiples of 8 khz are also available. each of the sync inputs accept a single-ended lvcmos frame pulse. since alignment is determined from the rising edge of the frame pulse, there is no duty cycle restriction on this input, but there is a minimum pulse width requirement of 5 ns. frequency detection for the sync i nputs is automatic for the s upported frame pulse frequencies shown in table 3. 1.4 ref and sync monitoring all input references ( ref0 to ref7 ) are monitored for frequency accuracy and phase regularity. new references are qualified before they can be selected as a synchronization source, and qualified references are continuously monitored to ensure that they are suitable for synchron ization. the process of qualifying a reference depends on four levels of monitoring. single cycle monitor (scm) the scm block measures the period of each reference cloc k cycle to detect phase irregu larities or a missing clock edge. in general, if the measured period deviates by more than 50% from the nominal period, then an scm failure (scm_fail) is declared. 2 khz 8 khz 64 khz 1.544 mhz 2.048 mhz 6.48 mhz 8.192 mhz 16.384 mhz 19.44 mhz 38.88 mhz 77.76 mhz custom a custom b table 2 - set of pre-defined auto-detect clock frequencies 166.67 hz (48x 125 s frames) 400 hz 1 khz 2 khz 8 khz 64 khz table 3 - set of pre-defined auto-detect sync frequencies
zl30120 data sheet 15 zarlink semiconductor inc. coarse frequency monitor (cfm) the cfm block monitors the reference fr equency over a measurement period of 30 s so that it can quickly detect large changes in frequency. a cfm failure (cfm_fail) is triggered when the frequency has changed by more than 3% or approximately 30000 ppm. precise frequency monitor (pfm) the pfm block measures the frequency accuracy of the reference over a 10 second interval. to ensure an accurate frequency measurement, the pfm measurement inte rval is re-initiated if phase or frequency irregularities are detected by the scm or cfm. the pfm provides a level of hysteresis between the acceptance range and the rejection range to prevent a failure i ndication from toggling between valid and invalid for references that are on the edge of the acceptance range. when determining the frequency accuracy of the refe rence input, the pfm uses t he external oscillator?s output frequency (f ocsi ) as its point of reference. guard soak timer (gst) the gst block mimics the operation of an analog integrator by accumulating failure events from the cfm and the scm blocks and applying a selectable rate of decay when no failures are detected. as shown in figure 5, a gst failure (gst_fail) is triggered when the accumulat ed failures have reached the upper threshold during the disqualification observation window. when there are no cfm or scm failures, the accumulator decrements until it reaches its lower th reshold during the qu alification window. figure 5 - behaviour of the guard soak timer during cfm or scm failures all sync inputs ( sync0 to sync2 ) are continuously monitored to ensure that there is a correct number of reference clock cycles within t he frame pulse period. 1.5 output clocks and frame pulses the zl30120 offers a wide variety of outputs including two low jitter lvcmos ( apll_clk0, apll_clk1 ) output clocks and four programmable lvcmos ( p0_clk0, p0_clk1, p1_clk0, p1_clk1 ) output clocks. in addition to the clock outputs, two lvcmos frame pulse outputs ( apll_fp0, apll_fp1 ) and two lvcmos programmable frame pulses ( p0_fp0, p0_fp1 ) are also available. the feedback clock ( fb_clk ) of dpll1 is available as an output cloc k. its output frequency is always equal to dpll1?s selected input frequency. ref cfm or scm failures upper threshold lower threshold t d - disqualification time t q - qualification time = n * t d t d t q gst_fail
zl30120 data sheet 16 zarlink semiconductor inc. the output clocks and frame pulses deriv ed from the low jitter apll are always synchronous with dpll1, and the clocks and frame pulses generated from the programmabl e synthesizers can be synchronized to either dpll1 or dpll2. this allows the zl30120 to have two independent timing paths. figure 6 - output clock configuration the supported frequencies for the output clo cks and frame pulses are shown in table 4. apll_clk0, apll_clk1 (lvcmos) 1 1. the apll_clk x outputs can generate either sonet/sdh or ethernet frequencies (25 mhz, 50 mhz). p0_clk0, p1_clk0 (lvcmos) p0_clk1, p1_clk1 (lvcmos) apll_fp0, apll_fp1, p0_fp0, p0_fp1 (lvcmos) 2 2. apll_fp x frequencies are available only when the low jitter apll is generating sonet/sdh frequencies 6.48 mhz 2 khz p x _clk0 p x _clk1 = 2 m 166.67 hz (48x 125 s frames) 9.72 mhz n * 8 khz (up to 100 mhz) 400 hz 12.96 mhz 1 khz 19.44 mhz 2 khz 25.92 mhz 4 khz 38.88 mhz 8 khz 51.84 mhz 32 khz 77.76 mhz 64 khz 25 mhz 50 mhz table 4 - output clock and frame pulse frequencies p0_clk0 p0_fp0 p0_clk1 p0_fp1 p0 synthesizer p1_clk0 p1_clk1 p1 synthesizer apll_clk0 apll_fp0 apll_clk1 apll_fp1 low jitter apll feedback synthesizer fb_clk dpll2 dpll1
zl30120 data sheet 17 zarlink semiconductor inc. 1.6 configurable input-to-output and output-to-output delays the zl30120 allows programmable stat ic delay compensation for controlli ng input-to-output and output-to-output delays of its clocks and frame pulses. all of the output synthesizers (apll, p0, p1, feedback) locked to dpll1 can be configured to lead or lag the selected input reference clock using the dpll1 fine delay . the delay is programmed in steps of 119.2 ps with a range of -128 to +127 steps giving a total delay adjustm ent in the range of -15.26 ns to +15.14 ns. negative values delay the output clock, positive values advance the output clock. synthesizers that are locked to dpll2 are unaffected by this delay adjustment. in addition to the fine delay introduced in the dpll1 path, th e apll, p0, and p1 synthesizers have the ability to add their own fine delay adjustments using the p0 fine delay , p1 fine delay , and apll fine delay . these delays are also programmable in steps of 119.2 ps with a range of -128 to +127 steps. in addition to these delays, the single-ended output clocks of the apl l, p0, and p1 synthesizers can be independently offset by 90, 18 0 and 270 degrees using the coarse delay . the output frame pulses (apll, p0) can be independently offset with respect to each other using the fp delay . figure 7 - phase delay adjustments dpll1 dpll2 p0 fine delay p0_clk0 p0_clk1 p0_fp0 p0_fp1 p0 synthesizer coarse delay coarse delay fp delay fp delay fb_clk p1_clk0 p1_clk1 p1 fine delay low jitter apll apll_clk0 apll_clk1 apll_fp0 apll_fp1 apll fine delay feedback synthesizer dpll1 fine delay coarse delay coarse delay fp delay fp delay coarse delay coarse delay p1 synthesizer
zl30120 data sheet 18 zarlink semiconductor inc. 2.0 software configuration the zl30120 is mainly controlled by accessing software regi sters through the serial perip heral interface (spi). the device can be configured to operate in a highly automated manner which minimi zes its interaction with the system?s processor, or it can operate in a manual mode where the system processor controls mo st of the operation of the device. the following table provides a summary of the registers avai lable for status updates and configuration of the device. addr (hex) register name reset value (hex) description type miscellaneous registers 00 id_reg a4 chip and version identification and reset ready indication register r 01 use_hw_ctrl 00 allows some functions of the device to be controlled by hardware pins r/w interrupts 02 ref_fail_isr ff reference failure interrupt service register r 03 dpll1_isr 70 dpll1 interrupt service register sticky r 04 dpll2_isr 00 dpll2 interrupt service register sticky r 05 ref_mon_fail_0 ff ref0 and ref1 failure indications sticky r 06 ref_mon_fail_1 ff ref2 and ref3 failure indications. sticky r 07 ref_mon_fail_2 ff ref4 and ref5 failure indications sticky r 08 ref_mon_fail_3 ff ref6 and ref7 failure indications sticky r 09 ref_fail_isr_mask 00 reference failure interrupt service register mask r/w 0a dpll1_isr_mask 00 dpll1 interrupt service register mask r/w 0b dpll2_isr_mask 00 dpll2 interrupt service register mask r/w 0c ref_mon_fail_mask_0 ff control register to mask each failure indicator for ref0 and ref1 r/w 0d ref_mon_fail_mask_1 ff control register to mask each failure indicator for ref2 and ref3 r/w 0e ref_mon_fail_mask_2 ff control register to mask each failure indicator for ref4 and ref5 r/w
zl30120 data sheet 19 zarlink semiconductor inc. 0f ref_mon_fail_mask_3 ff control register to mask each failure indicator for ref6 and ref7 r/w reference monitor setup 10 detected_ref_0 ff ref0 and re f1 auto-detected frequency value status register r 11 detected_ref_1 ff ref2 and re f3 auto-detected frequency value status register r 12 detected_ref_2 ff ref4 and re f5 auto-detected frequency value status register r 13 detected_ref_3 ff ref6 and re f7 auto-detected frequency value status register r 14 detected_sync_0 ee sync0 and sync1 auto-detected frequency value and sync failure status register r 15 detected_sync_1 0e sync2 auto-de tected frequency value and sync valid status register r 16 oor_ctrl_0 33 control register for the ref0 and ref1 out of range limit r/w 17 oor_ctrl_1 33 control register for the ref2 and ref3 out of range limit r/w 18 oor_ctrl_2 33 control register for the ref4 and ref5 out of range limit r/w 19 oor_ctrl_3 33 control register for the ref6 and ref7 out of range limit r/w 1a gst_mask_0 ff control register to mask the inputs to the guard soak timer for ref0 to ref3 r/w 1b gst_mask_1 ff control register to mask the inputs to the guard soak timer for ref4 to ref7 r/w 1c gst_qualif_time 1a control register for the guard_soak_timer qualification time and disqualification time for the references r/w dpll1 control 1d dpll1_ctrl_0 see register description control register for the dpll1 filter control; phase slope limit, bandwidth and hitless switching r/w 1e dpll1_ctrl_1 see register description holdover update time, filter_out_en, freq_offset_en, revert enable r/w addr (hex) register name reset value (hex) description type
zl30120 data sheet 20 zarlink semiconductor inc. 1f dpll1_modesel see register description control register for the dpll1 mode of operation r/w 20 dpll1_refsel 00 dpll1 reference selection or reference selection status r/w 21 dpll1_ref_fail_mask 3c control register to mask each failure indicator (scm, cfm, pfm and gst) used for automatic reference switching and automatic holdover r/w 22 dpll1_wait_to_restore 00 control register to indicate the time to restore a previous failed reference r/w 23 dpll1_ref_rev_ctrl 00 control register for the ref0 to ref7 enable revertive signals r/w 24 dpll1_ref_pri_ctrl_0 10 control register for the ref0 and ref1 priority values r/w 25 dpll1_ref_pri_ctrl_1 32 control register for the ref2 and ref3 priority values r/w 26 dpll1_ref_pri_ctrl_2 54 control register for the ref4 and re5 priority values r/w 27 dpll1_ref_pri_ctrl_3 76 control register for the ref6 and ref7 priority values r/w 28 dpll1_lock_holdover_status 04 dpll1 lock and holdover status register r 29 dpll1_pullinrange 03 control register for the pull-in range r/w dpll2 control 2a dpll2_ctrl_0 00 control register to program the dpll2: hitless switching, the phase slope limit and dpll enable r/w 2b dpll2_ctrl_1 04 control register to program the dpll2: filter_out_en, freq_offse t_en, revert enable r/w 2c dpll2_modesel 02 control register to select the mode of operation of the dpll2 r/w 2d dpll2_refsel 00 dpll2 reference selection or reference selection status r/w 2e dpll2_ref_fail_mask 3c control register to mask each failure indicator (scm, cfm, pfm and gst) used for automatic reference switching and automatic holdover r/w 2f dpll2_wait_to_restore 00 control register to indicate the time to restore a previous failed reference for the dpll2 path r/w addr (hex) register name reset value (hex) description type
zl30120 data sheet 21 zarlink semiconductor inc. 30 dpll2_ref_rev_ctrl 00 control register for the ref0 to ref7 enable revertive signals r/w 31 dpll2_ref_pri_ctrl_0 10 control register for the ref0 and ref1 priority values r/w 32 dpll2_ref_pri_ctrl_1 32 control register for the ref2 and ref3 priority values r/w 33 dpll2_ref_pri_ctrl_2 54 control register for the ref4 and re5 priority values r/w 34 dpll2_ref_pri_ctrl_3 76 control register for the ref6 and ref7 priority values r/w 35 dpll2_lock_holdover_status 04 dpll2 lock and holdover status register r p0 configuration registers 36 p0_enable 8f control register to enable p0_clk0, p0_clk1, p0_fp0, p0_fp1, the p0 synthesizer and select the source r/w 37 p0_run 0f control register to generate p0_clk0, p0_clk1, p0_fp0 and p0_fp1 r/w 38 p0_freq_0 00 control register for the [7:0] bits of the n of n*8k clk0 r/w 39 p0_freq_1 01 control regi ster for the [13:8] bits of the n of n*8k clk0 r/w 3a p0_clk0_offset90 00 control register for the p0_clk0 phase position coarse tuning r/w 3b p0_clk1_div 3e control register for the p0_clk1 frequency selection r/w 3c p0_clk1_offset90 00 control register for the p0_clk1 phase position coarse tuning r/w 3d p0_offset_fine 00 control register for the output/output phase alignment fine tuning for p0 path r/w 3e p0_fp0_freq 05 control register to select the p0_fp0 frame pulse frequency r/w 3f p0_fp0_type 83 control register to select fp0 type r/w 40 p0_fp0_offset_0 00 bits [7:0] of the programmable frame pulse phase offset in multiples of 1/262.14 mhz r/w 41 p0_fp0_offset_1 00 bits [15:8] of the programmable frame pulse phase offset in multiples of 1/262.14 mhz r/w addr (hex) register name reset value (hex) description type
zl30120 data sheet 22 zarlink semiconductor inc. 42 p0_fp0_offset_2 00 bits [21:16] of the programmable frame pulse phase offset in multiples of 8 khz cycles r/w 43 p0_fp1_freq 05 control register to select p0_fp1 frame pulse frequency r/w 44 p0_fp1_type 11 control register to select fp1 type r/w 45 p0_fp1_offset_0 00 bits [7:0] of the programmable frame pulse phase offset in multiples of 1/262.144 mhz r/w 46 p0_fp1_offset_1 00 bits [15:8] of the programmable frame pulse phase offset in multiples of 1/262.144 mhz r/w 47 p0_fp1_offset_2 00 bits [21:16] of the programmable frame pulse phase offset in multiples of 8 khz cycles r/w p1 configuration registers 48 p1_enable 83 control register to enable p1_clk0, p1_clk1, the p1 synthesizer and select the source r/w 49 p1_run 03 control register to generate enable/disable p1_clk0 and p1_clk1 r/w 4a p1_freq_0 c1 control register for the [7:0] bits of the n of n*8k clk0 r/w 4b p1_freq_1 00 control register for the [13:8] bits of the n of n*8k clk0 r/w 4c p1_clk0_offset90 00 control register for the p1_clk0 phase position coarse tuning r/w 4d p1_clk1_div 3f control register for the p1_clk1 frequency selection r/w 4e p1_clk1_offset90 00 control register for the p1_clk1 phase position coarse tuning r/w 4f p1_offset_fine 00 control register for the output/output phase alignrment fine tuning r/w apll configuration registers 50 apll_enable 8f control register to enable apll_clk0, apll_clk1, apll_fp0, apll_fp1 and the apll r/w 51 apll_run 0f control register to generate apll_clk0, apll_clk1, apll_fp0 and apll_fp1 r/w 52 apll_clk_div 42 control register for the apll_clk0 and apll_clk1 frequency selection r/w 53 apll_clk0_offset90 00 control register for the apll_clk0 phase position coarse tuning r/w addr (hex) register name reset value (hex) description type
zl30120 data sheet 23 zarlink semiconductor inc. 54 apll_clk1_offset90 00 control register for the apll_clk1 phase position coarse tuning r/w 55 apll_offset_fine 00 control register for the output/output phase alignment fine tuning for apll path r/w 56 apll_fp0_freq 05 control register to select the apll_fp0 frame pulse frequency r/w 57 apll_fp0_type 23 control regist er to select fp0 type r/w 58 apll_fp0_offset_0 00 bits [7:0] of the programmable frame pulse phase offset in multiples of 1/311.04 mhz r/w 59 apll_fp0_offset_1 00 bits [15:8] of the programmable frame pulse phase offset in multiples of 1/311.04 mhz r/w 5a apll_fp0_offset_2 00 bits [21:16] of the programmable frame pulse phase offset in multiples of 8 khz cycles r/w 5b apll_fp1_freq 03 control register to select apll_fp1 frame pulse frequency r/w 5c apll_fp1_type 03 control regist er to select fp1 type r/w 5d apll_fp1_offset_0 00 bits [7:0] of the programmable frame pulse phase offset in multiples of 1/311.04 mhz r/w 5e apll_fp1_offset_1 00 bits [15:8] of the programmable frame pulse phase offset in multiples of 1/311.04 mhz r/w 5f apll_fp1_offset_2 00 bits [21:16] of the programmable frame pulse phase offset in multiples of 8 khz cycles r/w 60 reserved a3 leave as default r/w 61 reserved 53 leave as default r/w external feedback configuration 62 fb_control 81 control register to enable fb_clk and the fb pll, int/ext feedback select r/w 63 fb_offset_fine f5 control register for the output/output phase alignment fine tuning r/w 64 reserved n * 8 khz reference control 65 ref_freq_mode_0 00 control register to set whether to use auto detect, customa or custom b for ref0 to ref3 r/w 66 ref_freq_mode_1 00 control register to set whether to use auto detect, customa or cust omb for ref4 to ref7 r/w addr (hex) register name reset value (hex) description type
zl30120 data sheet 24 zarlink semiconductor inc. 67 custa_mult_0 00 control register fo r the [7:0] bits of the custom configuration a. this is the n integer for the n*8khz reference monitoring. r/w 68 custa_mult_1 00 control register fo r the [13:8] bits of the custom configuration a. this is the n integer for the n*8khz reference monitoring. r/w 69 custa_scm_low 00 control register for the custom configuration a: single cycle scm low limiter r/w 6a custa_scm_high 00 control register for the custom configuration a: single cycle scm high limiter r/w 6b custa_cfm_low_0 00 control register for the custom configuration a: the [7:0] bits of the single cycle cfm low limit r/w 6c custa_cfm_low_1 00 control register for the custom configuration a: the [15:0] bits of the single cycle cfm low limit r/w 6d custa_cfm_hi_0 00 control register for the custom configuration a: the [7:0] bits of the single cycle cfm high limit r/w 6e custa_cfm_hi_1 00 control register for the custom configuration a: the [15:0] bits of the single cycle cfm high limiter r/w 6f custa_cfm_cycle 00 control register for the custom configuration a: cfm reference monitoring cycles - 1 r/w 70 custa_div 00 control register for the custom configuration a: enable the use of ref_div4 for the cfm and pfm inputs r/w 71 custb_mult_0 00 control register fo r the [7:0] bits of the custom configuration b. this is the 8 k integer for the n*8khz reference monitoring. r/w 72 custb_mult_1 00 control register fo r the [13:8] bits of the custom configuration b. this is the 8 k integer for the n*8khz reference monitoring. r/w 73 custb_scm_low 00 control register for the custom configuration b: single cycle scm low limiter r/w 74 custb_scm_high 00 control register for the custom configuration b: single cycle scm high limiter r/w 75 custb_cfm_low_0 00 control register for the custom configuration b: the [7:0] bits of the single cycle cfm low limiter. r/w addr (hex) register name reset value (hex) description type
zl30120 data sheet 25 zarlink semiconductor inc. . 3.0 references advancedtca, atca and the advancedtca and atca logo s are trademarks of the pci industrial computer manufacturers group. this datasheet provides a summary of the high level features of the zl30120. refer to the zl30120 design manual for a more complete description. 76 custb_cfm_low_1 00 control register for the custom configuration b: the [15:0] bits of the single cycle cfm low limiter. r/w 77 custb_cfm_hi_0 00 control register for the custom configuration b: the [7:0] bits of the single cycle cfm high limiter. r/w 78 custb_cfm_hi_1 00 control register for the custom configuration b: the [15:0] bits of the single cycle cfm high limiter. r/w 79 custb_cfm_cycle 00 control register for the custom configuration b: cfm reference monitoring cycles - 1 r/w 7a custb_div 00 control register for the custom configuration b: enable the use of ref_div4 for the cfm and pfm inputs r/w 7b - 7f reserved addr (hex) register name reset value (hex) description type

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