Hello,
nTRST signal in not only AM437x but also the other MCU/DSP devices should be connected to Pull-down resistor (except for having internal pull-down resistor).
I am designing AM437x JTAG interface. So, I checked AM437xIDK/SK/EVM JTAG connections as the reference design.
1.AM437x IDK is pull dowm resistor on nTRST Signal.
2.AM437x SK is pull up resistor on nTRST signal.
3.AM437x EVM is pull up resistor on nTRST signal.
I think that IDK is correct and SK/EVM are incorrect regarding nTRST pin treatment.
Is my understanding correct?
Best regards,
ay0689
