
describes the CN6 RS-232 connector pinout.
Table 28.
CN6 RS-232 connector pinout
Connector pin
number
STM32 pin
Board function
1
NC
NC
2
PG8
RXD / UART_RX from MCU
3
PG7
TXD / UART_TX from MCU
4
NC
NC
5
GND
GND
6
PH3_BOOT0
DSR / used as external input for BOOT0 pin driving
7
PG6
RTS / UART_RTS from MCU
8
PB13
CTS / UART_CTS from MCU
9
NC
NC
7.14.4
I/O restriction to other features
Caution:
Due to the sharing of some I/Os of STM32U575AII6Q by multiple peripherals, the following limitations apply in
using the RS-232 features:
•
The RS-232 RX/TX cannot be operated simultaneously with the UCPD_PWR interface.
•
The RS-232 RX/TX cannot be operated simultaneously with the optional I2C3 LPBAM interface.
•
The RS-232 CTS cannot be operated simultaneously with the TSC feature.
STM32U575I-EV
RS-232 port
UM2854
-
Rev 1
page 44/105