Debug I2C and UART are used for debugging the BLE stack in the SAM
B11 boards. Both these headers are not mounted on the production variant.
Pinout for the Debug I2C:
Table 1. Debug I2C Pinout
Specification| SAM B11 pin |
Function |
Shared functionality |
|---|
| I2C SCL |
Clock line for I2C |
EXT3 |
| GND |
Ground |
|
| I2C SDA |
Data line for I2C |
EXT3 |
| NC |
|
|
Pinout for Debug UART:
Table 2. Debug UART Pinout
Specification| SAM B11 pin |
Function |
Shared functionality |
|---|
| UART TXD |
UART TX pin |
EXT3 |
| UART RXD |
UART RX pin |
EXT3 |
| GND |
|
|