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| 2023/08/30 | UARTs Linux device updated info | ||
Contents
UARTs interfaceEdit
DescriptionEdit
The UART interfaces are available on the Evaluation Kit at the connectors J9 and J10.
J9 and J10 are 3 pin terminal blocks 5.0mm pitch respectively for USART3 and UART8. Can be independently used as RS232 or RS485 based on Part Number composition.
SignalsEdit
The following table describes the interface signals:
J9Edit
| Pin# | SOM Pin# | RS232 | RS485 | Pin Notes |
|---|---|---|---|---|
| 1 | J18.89 | USART3_TX | RS485_A | |
| 2 | J18.91 | USART3_RX | RS485_B | |
| 3 | - | Ground | Ground |
J10Edit
| Pin# | SOM Pin# | RS232 | RS485 | Pin Notes |
|---|---|---|---|---|
| 1 | J18.191 | UART8_TX | RS485_A | |
| 2 | J18.193 | UART8_RX | RS485_B | |
| 3 | - | Ground | Ground |
Device mappingEdit
USART3 is mapped to /dev/ttySTM1 device in Linux.
UART8 is mapped to /dev/ttySTM2 device in Linux.
Device usageEdit
Fix the signal cables to the terminal with a small flat screwdriver.