The embedded debugger features a Data Gateway Interface (DGI) by using either an SPI or
I²C. The DGI can send data from the WLR089U0 module to the host PC. For
further information on how to use the DGI interface, refer to the Data Visualizer and the EDBG User Guide.
Table 1. DGI Interface Connections using
SPI
| Pin on WLR089U0 Module |
Function |
Shared Functionality |
| PA27 |
GPIO/SPI SS (Slave Select) (WLR089U0
is Master) |
EXT3 |
| PB02 |
SERCOM5 PAD[0] SPI MISO (Master In, Slave Out) |
EXT1, EXT3, Serial Flash |
| PB22 |
SERCOM5 PAD[2] SPI MOSI (Master Out, Slave In) |
EXT1, EXT3, Serial Flash |
| PB23 |
SERCOM5 PAD[3] SPI SCK (Clock Out) |
EXT1, EXT3, Serial Flash |
Table 2. DGI Interface Connections using
I²C
| Pin on WLR089U0 Module |
Function |
Shared Functionality |
| PA16 |
SERCOM1 PAD[0] SDA (Data line) |
EXT1, EXT3 |
| PA17 |
SERCOM1 PAD[1] SCL (Clock line) |
EXT1, EXT3 |
Four GPIO lines are connected to the embedded debugger. The EDBG can monitor these lines and
timestamp pin value changes. This makes it possible to accurately timestamp events in
the WLR089U0 application code. For further information on how to
configure and use the GPIO monitoring features, refer to the Data Visualizer and the EDBG User Guide.
Table 3. GPIO Lines Connected to the EDBG
| Pin on WLR089U0 Module |
Function |
Shared Functionality |
| PA08 |
GPIO0 |
EXT1, EXT3 |
| PA14 |
GPIO1 |
EXT3, optional 12 MHz external crystal |
| PA15 |
GPIO2 |
EXT1, target USB ID, optional 12 MHz external crystal |
| PA22 |
GPIO3 |
EXT1 and serial Flash |