STM32F205XX_12 STMICROELECTRONICS [STMicroelectronics], STM32F205XX_12 Datasheet - Page 165

• Manufacturer Part Number: STM32F205XX_12
• Description: ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STM32F20xxx
Figure 98. RMII with a 25 MHz crystal and PHY with PLL
1. f
2. The 25 MHz (PHY_CLK) must be derived directly from the HSE oscillator, before the PLL block.
25 MHz
XTAL
HCLK
must be greater than 25 MHz.
HCLK (1)
MCU
TIM2
OSC
2.5 or 25 MHz
Timer
input
trigger
Timestamp
IEEE1588 PTP
comparator
Ethernet
MAC 10/100
STM32F
PLL
synchronous
/2 or /20
Doc ID 15818 Rev 9
HCLK
MCO1/MC02
50 MHz
RMII_TX_EN
RMII_TXD[1:0]
RMII_RXD[1:0]
RMII_CRX_DV
RMII_REF_CLK
PHY_CLK 25 MHz
MDIO
MDC
Application block diagrams
XT1
REF_CLK
= 7 pins
RMII
PHY 10/100
PLL
Ethernet
RMII + MDC
= 9 pins
MS19970V1
165/177