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CC3220S-LAUNCHXL: GPIO state of CC3220S when flashed with radio firmware

Navendu Shekhar
Intellectual 560 points
Part Number: CC3220S-LAUNCHXL
Other Parts Discussed in Thread: CC3220S, CC2650

Hi TI Team,

We have to send the Samples to RF lab for EMI/EMC testing so we have some query on below mentioned points . PLease help us to understand
>>1. What is the initialization state of radio firmware?
If we have flashed CC3220s with radio tool firmware and when we power on the board, will it transmit random packets or it will transmit only when by radio tool will be controlled?
>>2. What would be the state of all the GPIO when CC3220S has radio firmware and powered on?
>>3. What will happen on UART lines of CC3220S if it has radio firmware and powered ON?

We have connected CC3220S and CC2650 through UART lines. So i am asking for UART lines.


>>4. Does the CC2650 keep it's GPIOs connected to the WiFi UART in input/high-Z mode?
>>5. Is the WiFi UART RX line floating or does the CC3220 enable an internal pull-up?

Regards
Navendu

  • 0
    TI__Mastermind 28285 points
    Navendu,

    Please see answers below:

    1.) Radio firmware will wait for connection over UART to radio tool GUI. It will not send random packets
    2.) Some pins will be needed for UART, but unused GPIOs will not be initialized, and should be High Z.
    3.)The device will wait for connection from radio tool.
    4.) I'm unsure of this question... the CC2650 if routed to the device will still be routed. if you have radio tool programmed on your board, then you wont be able to send anything over uart to the CC2650.
    5.) Are you referring to the Launchpad reference? There is options to have pull ups or pull downs internally as well.