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CC Debugger and host mode

Nir Dvash
Intellectual 660 points

Dear Sirs,

How can i program a CC85XX device on a target board which is controlled by a host? I think that If i will power up my target, the host pins

will block the SPI signals. On the other hand, if i connect pin 9 on the CC debugger connector (3.3V) from the debugger to my target, i may consume too much current from

it and damage the debugger.

 

What should i do?

 

Thank you,

Nir.

 

  • 0
    TI__Expert 7160 points

    Hi Nir,

    You should make sure that the host/MCU is held in reset while flashing the CC85xx from the debugger. How to do this is entirely up to the customer. Could for example be done by pressing a button connectd to the MCU reset while flashing the CC85xx. It's also possible to let the 3.3V output on pin 9 on the debugger control the MCU reset. For example if the MCU reset is active low you can connect it to pin 9 on the debug connector via an inverter. So when the debugger is attached to the header it will hold the MCU in reset. Probably need a pull-up on the MCU reset pin as well.

    Best regards

    Kristoffer