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STM32F427AI 数据表(PDF) 230 Page - STMicroelectronics |
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STM32F427AI 数据表(HTML) 230 Page - STMicroelectronics |
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230 / 240 page  Application block diagrams STM32F427xx STM32F429xx 230/240 DS9405 Rev 12 B.3 Ethernet interface solutions Figure 99. MII mode using a 25 MHz crystal 1. fHCLK must be greater than 25 MHz. 2. Pulse per second when using IEEE1588 PTP optional signal. Figure 100. RMII with a 50 MHz oscillator 1. fHCLK must be greater than 25 MHz. MCU Ethernet MAC 10/100 Ethernet PHY 10/100 PLL HCLK XT1 PHY_CLK 25 MHz MII_RX_CLK MII_RXD[3:0] MII_RX_DV MII_RX_ER MII_TX_CLK MII_TX_EN MII_TXD[3:0] MII_CRS MII_COL MDIO MDC HCLK(1) PPS_OUT(2) XTAL 25 MHz STM32 OSC TIM2 Timestamp comparator Timer input trigger IEEE1588 PTP MII = 15 pins MII + MDC = 17 pins MS19968V1 MCO1/MCO2 MCU Ethernet MAC 10/100 Ethernet PHY 10/100 PLL HCLK XT1 PHY_CLK 50 MHz RMII_RXD[1:0] RMII_CRX_DV RMII_REF_CLK RMII_TX_EN RMII_TXD[1:0] MDIO MDC HCLK(1) STM32 OSC 50 MHz TIM2 Timestamp comparator Timer input trigger IEEE1588 PTP RMII = 7 pins RMII + MDC = 9 pins MS19969V1 /2 or /20 synchronous 2.5 or 25 MHz 50 MHz 50 MHz |
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