CC1120: cc1120 & cc debug

kwon

Intellectual 930 points

Part Number: CC1120
Other Parts Discussed in Thread: CC-DEBUGGER

HI~

I have a question when connecting CC1120 to cc debug.

The DC/DD waveform was measured during the RF test by performing SMARTRF STUDIO by connecting CC1120 to cc debug.

1) Both DC/DD are low for the continuous test, and DC LOW and DC HIGH for the packet test. What is the reason?

2) Under what conditions does DC/DD operate with DATA and CLOCK?

3) When CC1120 and CC DEBUG are connected, what are the errors if DC/DD are not connected?

4) What role does DC/DD play when CC1120 and CC DEBUG are connected?

Best Regards,

KWON.

over 3 years ago

+1 TheGhostOf over 3 years ago

Mastermind 6960 points

See https://www.ti.com/lit/ug/swru197h/swru197h.pdf and figure 9. The DD/ DC signals are not relevant for CC1120.

+1 kwon over 3 years ago in reply to TheGhostOf

Intellectual 930 points

FIGURE.9 is to connect SPI/DC(gpio2)/DD(gpio0). If it is not relevant, is it not necessary to connect DC/DD?

Why does gpio0 become high only when testing the SMARTRF STUDIO packet?

What part number does cc debugger DC/DD use?

Thanks~

+1 RGW over 3 years ago in reply to kwon

TI__Mastermind 35600 points

CC-Debugger Layout and Schematics: www.ti.com/lit/zip/swrr105

+1 TheGhostOf over 3 years ago in reply to kwon

Mastermind 6960 points

As should be covered in the UserGuide, DD/ DC are only used for SoCs. The CC1120 is controlled over a SPI interface and the GPIOs are typically setup to give an interrupt when sending/ receiving a packet. See table 10 in https://www.ti.com/lit/ug/swru295e/swru295e.pdf and the software examples.

Sub-1 GHz

Sub-1 GHz forum

CC1120: cc1120 & cc debug