Table 9 describes the pinout of the USB function.
Table 9. USB pinout
STM32 pin Signal name USB connector (CN2) pin
Remark
(1)
PM5 USB_HS_N A7, B7 -
PM6 USB_HS_P A6, B6 -
PM0 CC1 A5 -
PM1 CC2 B5 -
PM2 DB1 - Connected to CC1 when SB28 ON
PM3 DB2 - Connected to CC2 when SB26 ON
PM8 INT - Interrupt pin, open drain
PM9 PWR_EN - TCPP03 enable pin
PF12 ISENSE - SB56 OFF when using ST morpho
PF13 VSENSE - SB62 OFF when using ST morpho
PA9
I2C_SDA -
I2C3, SB35 ON, SB36 OFF
PF0 I2C2, SB35 OFF, SB36 ON
PA8
I2C_SCL -
I2C3, SB31 ON, SB32 OFF
PF1 I2C2, SB31 OFF, SB32 ON
1. The default configuration is in bold.
6.13
Ethernet
The STM32H7Rx/7Sx Nucleo-144 supports 10/100-Mbit Ethernet communication with a MICROCHIP LAN8742A-
CZ-TR PHY and integrates an
RJ45 connector (CN4). The Ethernet PHY is connected to the STM32H7S3L8H6
microcontroller via an RMII interface.
Table 10 describes the pinout of the Ethernet function.
Table 10. Ethernet pinout
STM32 pin Signal name
Configuration when using
Ethernet
Configuration when using ST Zio or ST
morpho connector
PB6 RMII reference clock SB63 ON SB63 OFF
PA2 RMII MDIO SB61 ON SB61 OFF
PG6 RMII MDC SB60 ON SB60 OFF
PA7 RMII RX data valid SB59 ON SB59 OFF
PG4 RMII RXD0 SB57 ON SB57 OFF
PG5 RMII RXD1 SB58 ON SB58 OFF
PG11 RMII TX enable SB53 ON SB53 OFF
PG13 RXII TXD0 SB54 ON SB54 OFF
PG12 RMII TXD1 SB55 ON SB55 OFF
UM3276
Hardware layout and configuration
UM3276 - Rev 1
page 24/40
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