Datasheet

Application block diagrams STM32F105xx, STM32F107xx
98/108 DocID15274 Rev 10
Figure 55. RMII with a 25 MHz crystal and PHY with PLL
1. HCLK must be greater than 25 MHz.
Figure 56. RMII with a 25 MHz crystal
1. The NS DP83848 is recommended as the input jitter requirement of this PHY. It is compliant with the output
jitter specification of the MCU.
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)
STM32F107xx
TIM2
Timestamp
comparator
Timer
input
trigger
IEEE1588 PTP
RMII
= 7 pins
RMII + MDC
= 9 pins
ai15658
/2 or /20
synchronous
2.5 or 25 MHz 50 MHz
XTAL
25 MHz
OSC
PLL
REF_CLK
MCU
Ethernet
MAC 10/100
Ethernet
PHY 10/100
PLLS
XT1/XT2
RMII_RXD[1:0]
RMII_CRX_DV
RMII_REF_CLK
RMII_TX_EN
RMII_TXD[1:0]
MDIO
MDC
HCLK
STM32F107xx
TIM2
Time stamp
comparator
Timer
input
trigger
IEEE1588 PTP
RMII
= 7 pins
RMII + MDC
= 9 pins
ai15659b
50 MHz
XTAL
25 MHz
OSC
NS DP83848
(1)
50 MHz
50 MHz
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