WB SH 3.5: UEXT2
This is the approved revision of this page, as well as being the most recent.
| Linux GPIO | Modem signal | SC16IS752 pin | UEXT pin name | pin # |
| - | 3.3V | - | UEXT 3.3V | 1 |
| - | GND | - | UEXT GND | 2 |
| - | TXD | TXB | UEXT UART TXD | 3 |
| - | RXD | RXB | UEXT UART RXD | 4 |
| 122 | CD | CDB | UEXT I2C SCL | 5 |
| 123 | RI | RIB | UEXT I2C SDA | 6 |
| 120 | DSR | DSRB | UEXT SPI MISO | 7 |
| 121 | DTR | DTRB | UEXT SPI MOSI | 8 |
| - | CTS | CTSB | UEXT SPI SCK | 9 |
| - | RTS | RTSB | UEXT SPI CS | 10 |