STM32F215REH7VTR 查看數據表（PDF） - STMicroelectronics

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STM32F215REH7VTR

ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM, crypto, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

STMicroelectronics 

STM32F21xxx

Application block diagrams

Figure 95. RMII with a 25 MHz crystal and PHY with PLL

MCU

HCLK(1)

STM32F

Ethernet

MAC 10/100

IEEE1588 PTP

Timer

input

TIM2

trigger

Timestamp

comparator

RMII_TX_EN

RMII_TXD[1:0]

RMII_RXD[1:0]

RMII_CRX_DV

RMII_REF_CLK

MDIO

MDC

Ethernet

PHY 10/100

RMII

= 7 pins

REF_CLK

RMII + MDC

= 9 pins

XTAL

25 MHz

/2 or /20

2.5 or 25 MHz synchronous 50 MHz

OSC

PLL

HCLK

PLL

MCO1/MC02 PHY_CLK 25 MHz XT1

MS19970V1

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.

Doc ID 17050 Rev 8

161/173

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