4.4.3 Atmel Data Gateway Interface
The Embedded Debugger features an Atmel Data Gateway Interface (DGI) by using either a SPI or I²C. The DGI can be used to send a variety of data from the ATSAML22N18A to the host PC. For further information on how to use the DGI interface, see Atmel Data Visualizer and the EDBG User Guide.
| SAM L22 pin | Function | Shared functionality |
|---|---|---|
| PB25 | SERCOM5 PAD[1] SPI SS (Slave select) (SAM L22 is Master) | - |
| PB24 | SERCOM5 PAD[0] SPI MISO (Master In, Slave Out) | - |
| PB22 | SERCOM5 PAD[2] SPI MOSI (Master Out, Slave in) | - |
| PB23 | SERCOM5 PAD[3] SPI SCK (Clock Out) | - |
| SAM L22 pin | Function | Shared functionality |
|---|---|---|
| PB30 | SERCOM5 PAD[0] SDA (Data line) | EXT1, EXT2, EXT3, Shield, and Crypto |
| PB31 | SERCOM5 PAD[1] SCL (Clock line) | EXT1, EXT2, EXT3, Shield, and Crypto |
Four GPIO lines are connected to the Embedded Debugger. The EDBG can monitor these lines and time stamp pin value changes. This makes it possible to accurately time stamp events in the SAM L22 application code. For further information on how to configure and use the GPIO monitoring features, see Atmel Data Visualizer and the EDBG User Guide.