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MPC5643L Datasheet(PDF) 92 Page - Freescale Semiconductor, Inc |
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MPC5643L Datasheet(HTML) 92 Page - Freescale Semiconductor, Inc |
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92 / 136 page  MPC5643L Microcontroller Data Sheet, Rev. 8.1 Electrical characteristics Freescale Semiconductor 92 3.13 FMPLL electrical characteristics Table 23. FMPLL electrical characteristics Symbol Parameter Conditions Min Typ Max Unit fREF_CRYSTAL fREF_EXT D FMPLL reference frequency range1 1 Considering operation with FMPLL not bypassed. Crystal reference 4 — 40 MHz fPLL_IN D Phase detector input frequency range (after pre-divider) —4 — 16 MHz fFMPLLOUT D Clock frequency range in normal mode —4 — 1202 2 With FM; the value does not include a possible +2% modulation MHz fFREE P Free running frequency Measured using clock division (typically 16) 20 — 150 MHz fsys D On-chip FMPLL frequency2 —16 — 120 MHz tCYC D System clock period — — — 1 / fsys ns fLORL fLORH D Loss of reference frequency window3 3 “Loss of Reference Frequency” window is the reference frequency range outside of which the FMPLL is in self clocked mode. Lower limit 1.6 — 3.7 MHz Upper limit 24 — 56 fSCM D Self-clocked mode frequency4,5 —20 — 150 MHz tLOCK P Lock time Stable oscillator (fPLLIN = 4 MHz), stable VDD —— 200 µs tlpll D FMPLL lock time 6, 7 —— — 200 s tdc D Duty cycle of reference —40 — 60 % CJITTER T CLKOUT period jitter8,9,10,11 Long-term jitter (avg. over 2 ms interval), fFMPLLOUT maximum –6 — 6 ns t PKJIT T Single period jitter (peak to peak) PHI @ 120 MHz, Input clock @ 4 MHz —— 175 ps PHI @ 100 MHz, Input clock @ 4 MHz —— 185 ps PHI @ 80 MHz, Input clock @ 4 MHz —— 200 ps t LTJIT T Long term jitter PHI @ 16 MHz, Input clock @ 4 MHz —— ±6 ns fLCK D Frequency LOCK range — –6 — 6 % fFMPLLOUT fUL D Frequency un-LOCK range — –18 — 18 % fFMPLLOUT fCS fDS D Modulation depth Center spread ±0.25 — ±2.0 % fFMPLLOUT Down spread –0.5 — -8.0 fMOD D Modulation frequency12 — — — 100 kHz |
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