Hi,
Our customer is using IAR I-jet emulator with TMS470M device. This emulator worked with TI 470M EVM without issue.
So customer made original board as prototype. But I-jet emulator can't connect to customer's board.
Customer checked to own board, and modified the below points.
1) Modified the value of pull-up/pull-down registors. TI EVM uses 100kohm registor for pull-up/pull-down. But customer has used 10kohm. So customer changed registor value from 10kohm to 100kohm. This modification improved signal level of nTRST(48pin).
2) nRST was N.C. Customer added pull-up registor (100kohm) to nRST pin(98pin) .
The above modification made same condition as I-jet emulator with TI EVM. But the emulator can't still connect to customer's board. TMS470M seems to remain reset status.
If you have any advice that we should check, please let me know.
I appreciate your quick reply.
Best regards,
Michi