We are using RM57L843 for one of our control card. We are using XDS100V2. We found that when XDS100V2 is connected and trying to connect, it is generating nTRST high and then low and then high. It remain in high state. After that we found that RST pin and PORRST is going permanently unless XDS100V2 is disconnected or board is power cycle.
We are not able to understand the reason for this behavior.
Following is the pin state before nTRST:
RST- high
PORRST-high
nTRST-Low
After nTRST sequence:
RST- permanently low
PORRST- Permanently low
nTRST-High
Board remain in reset state.
Can you tell us reason for above behaviour.