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STM32F479AI 数据表(PDF) 117 Page - STMicroelectronics |
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STM32F479AI 数据表(HTML) 117 Page - STMicroelectronics |
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117 / 208 page  DocID028010 Rev 2 117/208 STM32F479xx Electrical characteristics 187 tLOCK PLL lock time VCO freq = 192 MHz 75 - 200 µs VCO freq = 432 MHz 100 - 300 Jitter(3) Cycle-to-cycle jitter System clock 120 MHz RMS - 25 - ps peak to peak - ±150 - Period Jitter RMS - 15 - peak to peak - ±200 - Main clock output (MCO) for RMII Ethernet Cycle to cycle at 50 MHz on 1000 samples -32- Main clock output (MCO) for MII Ethernet Cycle to cycle at 25 MHz on 1000 samples -40- Bit Time CAN jitter Cycle to cycle at 1 MHz on 1000 samples - 330 - IDD(PLL)(4) PLL power consumption on VDD VCO freq = 192 MHz VCO freq = 432 MHz 0.15 0.45 - 0.40 0.75 mA IDDA(PLL)(4) PLL power consumption on VDDA VCO freq = 192 MHz VCO freq = 432 MHz 0.30 0.55 - 0.40 0.85 1. Take care of using the appropriate division factor M to obtain the specified PLL input clock values. The M factor is shared between PLL and PLLI2S. 2. Guaranteed by design. 3. The use of 2 PLLs in parallel can degrade the Jitter up to +30%. 4. Based on test during characterization. Table 41. Main PLL characteristics (continued) Symbol Parameter Conditions Min Typ Max Unit Table 42. PLLI2S (audio PLL) characteristics Symbol Parameter Conditions Min Typ Max Unit fPLLI2S_IN PLLI2S input clock(1) -0.95(2) 12.10 MHz fPLLI2S_OUT PLLI2S multiplier output clock -- - 216 fVCO_OUT PLLI2S VCO output - 192 - 432 tLOCK PLLI2S lock time VCO freq = 192 MHz 75 - 200 µs VCO freq = 432 MHz 100 - 300 Jitter(3) Master I2S clock jitter Cycle to cycle at 12.288 MHz on 48KHz period, N=432, R=5 RMS - 90 - - peak to peak - ±280 - ps Average frequency of 12.288 MHz, N=432, R=5 on 1000 samples -90 - ps WS I2S clock jitter Cycle to cycle at 48 KHz on 1000 samples - 400 - ps |
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