Hi all,
Background
We are using the TMDSLCDK6748 eval platform schematics as the basis for a custom test board design.
The custom test board uses DSP chip: TMS320C6748EZWT4.
Problem:
The C6448 chip is unable to be flashed with software. Attempts result in:
error: 6311 PRSC module failed to write to a register
Other thread posts suggest this is typically a power issue.
We have followed suggestions of other threads and have inspected the core status via the JTAG route controller (ICEPICK).
Status:
Clock: CLK On
Power: Power Off
Clock Down Desired: CLK Down active
Power Down Desired: Power Down inactive
In Reset: In Reset
Reset Control: Reset (None)
We note that this is not a valid core status as described in the CCS manual:
https://software-dl.ti.com/ccs/esd/documents/users_guide/ccs_debug-main.html#core-status
Can someone advise on other troubleshooting avenues? Thanks in advance.
Troubleshooting Efforts
1. Since this a powerup issue, we have checked the required power-on-reset sequence as described here: https://www.ti.com/lit/an/slva490/slva490.pdf
Measured power-on trace
2. Verified: TRST is pulled low in the circuit as this is required: https://www.ti.com/lit/an/spracm8a/spracm8a.pdf
