WLR089 Xplained Pro Evaluation board contains a 4-Mb
serial Flash (AT25DF041B-SSHN-T) for Firmware Update Over-The-Air (FUOTA) and other
applications. The SPI signals are connected to SERCOM 5. SPI signals are also available
on EXT1, EXT3 and the embedded debugger.
Table 1. Signals Pin
Description
Pin on WLR089U0 Module |
Function |
Shared Functionality |
PB22 |
MOSI |
EXT1, EXT3, EDBG |
PA22(1) |
CS |
EXT1, EDBG |
PB23 |
SCK |
EXT1, EXT3, EDBG |
PB02 |
MISO |
EXT1, EXT3, EDBG |
Note:
- 1.Ensure that a jumper cap is
placed on the J306 header. Do not use the IRQ line at pin 9 in the EXT1
header while using serial Flash.