Ethernet; Table 15. Hardware Configuration For The Ucpd Feature; Table 16. Ethernet Pin Configuration - ST STM32H5 User Manual

Pin
name
PB13 UCPD_CC1
PB14 UCPD_CC2
PG7 UCPD_FLT
PA9 UCPD_DBn
PA4 VBUS_SENSE
1. The default configuration is in bold.
10.7

Ethernet

The STM32H5 Nucleo-144 board supports 10M/100M Ethernet communication by a PHY LAN8742A-CZ-TR
(U15) and RJ45 connector (CN14). Ethernet PHY is connected to the STM32H5 series microcontroller via the
RMII interface. The PHY RMII_REF_CLK generates the 50 MHz clock for the STM32H5 series microcontroller.
Note: Make sure that JP6 is ON when using Ethernet.
Note: Ethernet PHY LAN8742A must be set in power-down mode (in this mode, the Ethernet PHY reference clock
turns off) to achieve the expected low-power mode current. This is done by configuring the Ethernet PHY basic
control register (at address 0x00) bit 11 (power down) to '1'. SB58 can also be OFF to get the same effect.
Pin name
PA1
PA2
PC1
PA7
PC4
PC5
PG11
PG13
PB15
UM3115 - Rev 2
Table 15. Hardware configuration for the UCPD feature
Solder
Function
State
Bridge
ON
SB29
OFF
ON
SB30
OFF
ON
SB74
OFF
ON
SB31
OFF
ON
SB56
OFF
Table 16.
Conflict with Zio
Function
connector signal
RMII reference clock
RMII MDIO
RMII MDC
RMII RX data valid
RMII RXD0
RMII RXD1
RMII TX enable
RXII TXD0
RMII TXD1
(1)
PB13 is connected to the USB Type-C
UCPD_CC1. (SB6 and SB12 must be OFF).
If SB6 is ON, thus the protection on the CC1 line is bypassed
PB13 can be used as:
• GPIO on ST morpho connector (CN12)
– (SB12 must be OFF)
• I2S_CK signal on the Zio connector (CN7)
– (SB12 must be ON).
PB14 is connected to the USB Type-C
UCPD_CC2. (SB5 must be OFF).
If SB5 is ON, the protection on the CC2 line is bypassed
PB13 can be used as a GPIO on the ST morpho connector (CN12)
PG7 is connected to the USB Type-C
overvoltage fault reporting to the MCU.
PB13 can be used as a GPIO on the ST morpho connector (CN12)
PA9 is connected to the USB Type-C
as a dead battery feature
PA9 can be used as a GPIO on the ST morpho connector (CN12)
PA4 is used as the VBUS_SENSE signal
PA4 can be used as a GPIO on the ST morpho connector (CN11)
Ethernet pin configuration
Configuration when
using Ethernet
- SB58 ON
- SB69 ON
- SB62 ON
- SB38 ON
- SB42 ON
- SB36 ON
- SB34 ON
- SB37 ON
I2S_A_SD JP6 ON
UM3115
Description
®
port protection and used as
®
port protection and used as
®
port protection and used as
®
port protection and is used
Configuration when
using ST Zio or ST
morpho connector
SB58 OFF
SB69 OFF
SB62 OFF
SB38 OFF
SB42 OFF
SB36 OFF
SB34 OFF
SB37 OFF
JP6 OFF
Ethernet
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