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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC5645S датащи(PDF) 84 Page - Freescale Semiconductor, Inc |
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MPC5645S датащи(HTML) 84 Page - Freescale Semiconductor, Inc |
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84 / 146 page  Qorivva MPC5645S Microcontroller Data Sheet, Rev. 8 84 Freescale Semiconductor 4.10 Fast external crystal oscillator (4–16 MHz) electrical characteristics This device implements the fast external oscillator (FXOSC) using a low power Loop Controlled Pierce Oscillator (LCP) configuration. 4 Guaranteed by design simulation. 5 This is a transient configuration during power-up, up to the end of reset PHASE2 (refer to RGM module section of the reference manual). 6 C L calculation should include device and package capacitance (CPKG < 5pF). Table 38. Fast external crystal oscillator electrical characteristics Symbol Parameter Conditions Value Unit SpecID Min Typ Max fOSC C Crystal oscillator range Loop controlled Pierce 4.0 — 16 MHz O9.1 iOSC D Startup current — 100 — — µA O9.2 tUPOSC C Oscillator start-up time Loop controlled Pierce — 41 1 f OSC = 4 MHz, C = 22 pF. 502 2 Maximum value is for extreme cases using high Q, low frequency crystals. ms O9.3 tCQOUT D Clock quality check time-out — 0.45 2.5 s O9.4 fCMFA D Clock monitor failure assert frequency — 200 400 800 kHz O9.5 fEXT D External square wave input frequency2 — 2.0 — 50 MHz O9.6 tEXTL D External square wave pulse width low — 9.5 — — ns O9.7 tEXTH D External square wave pulse width high — 9.5 — — ns O9.8 tEXTR D External square wave rise time — — — 1 ns O9.9 tEXTF D External square wave fall time — — — 1 ns O9.10 CIN D Input capacitance EXTAL and XTAL pins — 7 — pF O9.11 VIH,EXTAL P EXTAL pin input high voltage2 —0.75 VDDPLL —— V O9.12 T— — VDDPLL +0.3 VIL,EXTAL P EXTAL pin input low voltage2 —— — 0.25 VDDPLL VO9.13 TVSSPLL- 0.3 —— VHYS,EXTAL C EXTAL pin input hysteresis2 —— 180 — mV O9.14 VPP,EXTAL C EXTAL pin oscillation amplitude Loop controlled Pierce — 1.0 — V O9.15 |
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