SLLU397 April 2025
The WAKE pin of the transceiver (pin 9) is routed to J4. The signal path to the J2 header is pre-installed the with a 22nF filtering capacitor, C8, a 3.3kΩ pullup resistor to VSUP, R22, and a 33.2kΩ series resistor, R23. The switch S1 can be used to generate a rising or falling edge to wake up the device in addition to the J4 header.