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STM32F427AI 数据表(PDF) 231 Page - STMicroelectronics

部件名 STM32F427AI
功能描述  32b Arm® Cortex®-M4 MCUFPU, 225DMIPS, up to 2MB Flash/2564KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 com. interfaces, camera & LCD-TFT
PDF  240 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STM32F427AI 数据表(HTML) 231 Page - STMicroelectronics

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DS9405 Rev 12
231/240
STM32F427xx STM32F429xx
Application block diagrams
231
Figure 101. RMII with a 25 MHz crystal and PHY with PLL
1. fHCLK must be greater than 25 MHz.
2. The 25 MHz (PHY_CLK) must be derived directly from the HSE oscillator, before the PLL block.
MCU
Ethernet
MAC 10/100
Ethernet
PHY 10/100
PLL
HCLK
XT1
PHY_CLK 25 MHz
RMII_RXD[1:0]
RMII_CRX_DV
RMII_REF_CLK
RMII_TX_EN
RMII_TXD[1:0]
MDIO
MDC
HCLK(1)
STM32F
TIM2
Timestamp
comparator
Timer
input
trigger
IEEE1588 PTP
RMII
= 7 pins
RMII + MDC
= 9 pins
MS19970V1
/2 or /20
synchronous
2.5 or 25 MHz
50 MHz
XTAL
25 MHz
OSC
PLL
REF_CLK
MCO1/MCO2



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