Radio Test with nrf21540

RE: Radio Test with nrf21540

Andreas — Tue, 05 Jan 2021 13:04:19 GMT

Hi,

Yes, VDD must be between 3.45V and 3.6V to program the EFUSE.

You can manually adjust TXGAIN in CONFREG0, but note that this will reset to the production trimmed value or UICR value when it is reset or powered-on.

Best regards,
Andreas

RE: Radio Test with nrf21540

IanChen — Tue, 05 Jan 2021 03:40:58 GMT

We try to programming the POUTA_UICR and POUTB_UICR register, and fellow the step in datasheet.

Program CONFREG1 to 0xF4, which mean enable UICR program mode and enter UICR program mode, and read out to check the value.

But the CONFREG2 and CONFREG3 can’t be programed.

I noticed that the VDD need to in the range 3.45v to 3.6v, but in our HW design the VDD is 3.3v.

Could you help to check the VDD range must to in the 3.45 to 3.6v range or not?

RE: Radio Test with nrf21540

Andreas — Tue, 29 Dec 2020 07:39:27 GMT

Hi,

Which board are you using? Are you seeing ~20dBm if you run any of the other TX commands? What is the state of the CSN pin?

Best regards,
Andreas