'wakeupEnabled = true' doesn't work (single ended attena no AAT) with ST25R3916

[diverger]

My board is single ended antenna, no AAT, and no capacitive sensor connected. I use a similar analog config with NFC06A1, but select only one channel. And it works when 'wakeupEnabled = false', failed when 'wakeupEnabled = true'. What may be the problem here? Am I missed something?

Thanks.

[Travis Palmer]

​Hello Diverger,

can you please check the voltage on RFO when doing the reference measurment?

You should be able to see the 25µs pulse on the oscilloscope when doing the reference measurement.

What is the ADC value / reference value?

To switch to single ended configuration, the bit Single and RFO have to be configured propperly (IO configuration register 1).

Please let me know, if this helps!

br Travis

[diverger]

I will check it next week. By the way, is this related with the power supply and the driver impedance settings? I'm using 3.3V and 4 ohms driver resistance.​

[Travis Palmer · Accepted solution]

​Hello Diverger,

No, checking the signal on the RFO would just tell us if the switching of "single" and "rfo" bit is correct.

The wake-up functionallity should not be influenced by using 3V or 5V supply.

br Travis