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DSPIC33FJMC302ESS 数据表(PDF) 246 Page - Microchip Technology |
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DSPIC33FJMC302ESS 数据表(HTML) 246 Page - Microchip Technology |
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246 / 330 page  dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 DS70283K-page 246 © 2007-2012 Microchip Technology Inc. TABLE 24-17: PLL CLOCK TIMING SPECIFICATIONS (VDD = 3.0V TO 3.6V) AC CHARACTERISTICS Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40°C ≤TA ≤+85°C for Industrial -40°C ≤TA ≤+125°C for Extended Param No. Symbol Characteristic Min Typ(1) Max Units Conditions OS50 FPLLI PLL Voltage Controlled Oscillator (VCO) Input Frequency Range(2) 0.8 — 8 MHz ECPLL, XTPLL modes OS51 FSYS On-Chip VCO System Frequency(3) 100 — 200 MHz — OS52 TLOCK PLL Start-up Time (Lock Time)(3) 0.9 1.5 3.1 mS — OS53 DCLK CLKO Stability (Jitter)(3) -3 0.5 3 % Measured over 100 ms period Note 1: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and are not tested. 2: These parameters are characterized by similarity, but are tested in manufacturing at 7.7 MHz input only. 3: These parameters are characterized by similarity, but are not tested in manufacturing. This specification is based on clock cycle by clock cycle measurements. To calculate the effective jitter for individual time bases or communication clocks use this formula: Peripheral Clock Jitter DCLK FOSC Peripheral Bit Rate Clock -------------------------------------------------------------- ⎝⎠ ⎛⎞ ------------------------------------------------------------------------ = For example: Fosc = 32 MHz, DCLK = 3%, SPI bit rate clock, (i.e., SCK) is 2 MHz. SPI SCK Jitter DCLK 32 MHz 2 MHz -------------------- ⎝⎠ ⎛⎞ ------------------------------ 3% 16 ---------- 3% 4 -------- 0.75% == = = TABLE 24-18: AC CHARACTERISTICS: INTERNAL RC ACCURACY AC CHARACTERISTICS Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40°C ≤TA ≤+85°C for industrial -40°C ≤TA ≤+125°C for Extended Param No. Characteristic Min Typ Max Units Conditions Internal FRC Accuracy @ FRC Frequency = 7.37 MHz(1) F20a FRC -2 — +2 % -40°C ≤TA ≤+85°C VDD = 3.0-3.6V F20b FRC -5 — +5 % -40°C ≤TA ≤+125°C VDD = 3.0-3.6V Note 1: Frequency calibrated at 25°C and 3.3V. TUN bits can be used to compensate for temperature drift. TABLE 24-19: INTERNAL RC ACCURACY AC CHARACTERISTICS Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) Operating temperature -40°C ≤TA ≤+85°C for Industrial -40°C ≤TA ≤+125°C for Extended Param No. Characteristic Min Typ Max Units Conditions LPRC @ 32.768 kHz(1,2) F21a LPRC -15 ±6 +15 % -40°C ≤TA ≤+85°C VDD = 3.0-3.6V F21b LPRC -40 — +40 % -40°C ≤TA ≤+125°C VDD = 3.0-3.6V Note 1: Change of LPRC frequency as VDD changes. 2: LPRC impacts the Watchdog Timer Time-out Period (TWDT1). See Section 21.4 “Watchdog Timer (WDT)” for more information. |
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