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AM625: AM6254X

Part Number: AM625

Hi TI guys:

this is Kevin from Honeywell Tianjin china.

I have one question about JTAG function: i have found that the "TRSTN" Port is pulled down in your EVM. 

Could you please explain how this pin effect the MCU?

in my understanding, when this pin's input voltage level is low, MCU will reset, but your EVM pull this pin to be low.


  • Hello Kevin Kong, 

    Thank you for the Query.

    Please refer to the datasheet recommendation as below

    Each of these balls must be connected to VSS through separate
    external pull resistors to ensure they are held to a valid logic low
    level if a PCB signal trace is connected and not actively driven by an
    attached device. The internal pull-down may be used to hold a valid
    logic low level if no PCB signal trace is connected to the ball.