Tool/software:
Hello,
We have made a design of a PCB in which we use a TMS570LC4357 microcontroller to manage an SPI network.
Before to the design we used the launchxl2-570lc43 evaluation board to perform testing and debugging.
Now we are trying to program the microcontroller of our design by interconnecting all the JTAG signals of the evaluation board with the board of our design in parallel, we have cut the tracks of the SDO and RTCK signals to avoid that the micro of the eval board could return data. Wa just want the return of the microcontroller of our design. In this stage we just want to program the extarnal microcontroller. The schematic is the next:
When programming the software it reports an error and we check that the SDO signal does not return anything. Do you see any errors or ploblems in our JTAG connections?
Another thing that worries us is that we left the "test" pin (U2) of the microcontroller open. The datasheet says that a pulldown must be installed for proper operation, although I've read that it already has its own internal pulldown. Is it a real problem?
Thanks.
