Bitbang the PA to do an OOK TX

RE: Bitbang the PA to do an OOK TX

Jeffrey Ryan — Wed, 01 Jul 2020 04:15:48 GMT

Hi Ketil. I just tested it and I was to able achieve my target data rate. Thanks for your help!

Regards,

Jeff

RE: Bitbang the PA to do an OOK TX

ketiljo — Mon, 29 Jun 2020 10:35:54 GMT

Hi Jeffrey

It's a internal register.

cheers,

Ketil

RE: Bitbang the PA to do an OOK TX

Jeffrey Ryan — Mon, 29 Jun 2020 09:28:29 GMT

Hi Ketil.

Thanks for this. The address that you mentioned is not indicated in the structure. It is under [reserved]. I'll get back to you once I have tested it. By the way, my target data rate is 5 kbps.

RE: Bitbang the PA to do an OOK TX

ketiljo — Tue, 23 Jun 2020 08:23:53 GMT

Hi Jeffrey

It depends on the datarate you're looking for here. It's possible to turn off the PA by flipping a bit in a register. If you write 0x2000 0000 into register 0x4000 176C, the PA will be switched off. Write 0x0 to turn it on again. The ramp up/down time should be ~1µs but i haven't verified this.

Turning off the PA will set the output power to ~-30 dBm in 0 dBm mode, ~-60 dBm in 4 dBm mode and ~-50 dBm in 8 dBm mode. This is because the drive power is different.

best regards,

Ketil Aas-Johansen