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Hello， are you using the EVM or your own board? Note that the OWI voltages referenced in the datasheet need to be the voltages directly at the VDD pin, and not the supply to their total application. If you send the activation pulse described in the OWI activation section of the datasheet that should enable the OWI transceiver. If you are using a debugger while testing firmware you can see the OWI activation interrupt get triggered.
thanks for your reply.I inputed the OWI voltages directly at the VDD pin, But unfortunately , the IC PGA900 can't triggered the OWI activation interrupt. It seemed the IC was reset.
