ETRA SOM/ETRA Evaluation Kit/Interfaces and Connectors/UARTs
| HOME | SOMs | SBCs | ToloMEO Embedded Assistant |  GET A QUOTE
|
 ONLINE HELPDESK
|
| Roadmap | IoT Services | ML/AI services | Embedded Design Services |
| History | |||
|---|---|---|---|
| Version | Issue Date | Notes | |
| 1.0.0 | Dec 2020 | First Release | |
Contents
UARTs interface[edit | edit source]
Description[edit | edit source]
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 kit model. TODO:aggiungere link alla pagina di composizione P/N
[[File:{Template:Nome-som-EVB-UARTs-connector.png|thumb|center|500px|UARTs connector]]
Signals[edit | edit source]
The following table describes the interface signals:
J9[edit | edit source]
| Pin# | SOM Pin# | RS232 | RS485 | Pin Notes |
|---|---|---|---|---|
| 1 | J18.89 | USART3_TX | RS485_A | |
| 2 | J18.91 | USART3_RX | RS485_B | |
| 3 | - | Ground | Ground |
J10[edit | edit source]
| 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 mapping[edit | edit source]
USART3 is mapped to /dev/ttyxxx device in Linux.
UART8 is mapped to /dev/ttyxxx device in Linux.
Device usage[edit | edit source]
Fix the signal cables to the terminal with a small flat screwdriver.
