Occasionally our WP7609s won’t wake from ULPM using the POWER_ON_N pin. We have to first trigger a module reset using RESET_IN_N, then triggering the POWER_ON_N pin will power the module on. It seems to be occurring about 20-30% of attempts to power on.
Has anyone experienced this behaviour? I can’t find any documents which discuss enabling/disabling the POWER_ON_N pin. Is there a configuration option anyone knows of which could be causing this?
Another possibility I’m considering is that the module’s MCU might be crashing…?
Keen to hear any ideas anyone else has