CC1120: CC1120/25 I/Q output

Randy Hermes

Part Number: CC1120
Other Parts Discussed in Thread: CC1200

In a response to a previous issue, TI had recommended using the CC1120/25 I/Q output. I've taken a look at the datasheet and user guide and I didn't see where the I/Q data from the chip was available.

Please explain how to get to the I/Q data from the chip.

Thanks,

Randy

over 5 years ago

0 TER over 5 years ago

TI__Guru**** 317180 points

See e2e.ti.com/.../527413

0 Randy Hermes over 5 years ago in reply to TER

Prodigy 50 points

Thank you - one more question, will this same setup work with the CC1200?

0 TER over 5 years ago in reply to Randy Hermes

TI__Guru**** 317180 points

No. The CC112x has a single bit ADC, CC1200 is 1.5 bit. To be able to output double the information on the same time, only the data from one ADC is possible to route externally on the CC1200.

0 Randy Hermes over 5 years ago in reply to TER

Prodigy 50 points

Thanks

0 Randy Hermes over 5 years ago in reply to TER

Prodigy 50 points

One more question - the post you pointed me to mentioned that you can get the post filter I/Q data out of the CC1120/25, but did not supply directions for doing this.

Is it possible to get the post filter I/Q data out of the CC1200? I understand that this will be multibit values.

If it is possible, can you provide directions for doing it?

Thank You,

Randy

0 TER over 5 years ago in reply to Randy Hermes

TI__Guru**** 317180 points

The post filter I/Q data are available in the CHFILT_I/ CHFILT_Q registers. See table 10 (GPIOx_CFG = 40) to get information about when the register value is updated.

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CC1120: CC1120/25 I/Q output