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CC3235MODSF: GP02 is not responding while using as ADC

SARJU BHATNAGAR
Expert 1020 points
Part Number: CC3235MODSF
Other Parts Discussed in Thread: UNIFLASH

Hi TI,

We are using GP02 as ADC after burning the code in the controller (by disconnecting the ADC signal), but while ADC is connected ,controller is not getting connect with uniflash. if we break the ADC signal from the controller,  and reset the board , controller started working. even  other pins of ADC is responding well except GP02 . controller is not responding while connected with ADC signal to GP02.

kindly help out us , to resolve the issue.

Thanks and Regard

sarju bhatnagar

  • 0
    Guru 79985 points

    Hi,

    This is pretty expected. Because this is same pin as are used for Uniflash connection. GPIO2 pin (pin 47 at MOD) is used for Uniflash UART RX.

    Jan

  • 0 in reply to Jan D
    Expert 1020 points

    Thanks for reply Jan,

    You are right , but I wanted to ask that after burning the code  when I am pressing reset button while ADC is connected at GP02, code is not restarting, but when I disconnected ADC signal , it restarting well. Even my UART pin is different pin03 and pin04, where my UART terminal is connected.

    Please let us the issue.

    Thanks again.

    Sarju Bhatnagar

  • 0 in reply to SARJU BHATNAGAR
    Guru 79985 points

    Hi,

    This is likely that you are using SOP mode 0-1-0. In this SOP mode is entering into programming mode (UART loader) determined by break signal at RX pin during startup. Break signal of UART is a low state of RX line. When is SOP mode 0-1-0 and you want to start programmed code, your RX line should be hold at high state by weak pull-up. Other option can be use another SOP mode. SOP modes are descibed at data-sheet.

    Jan

  • 0 in reply to Jan D
    Expert 1020 points

    Thanks for your support, issue has been resolved.

    Br,

    Sarju Bhatnagar