Other Parts Discussed in Thread: TPS3306, TPS3305
Tool/software: Code Composer Studio
I have a custom board design using the TMS320VC5409 DSP chip which we have used for 15+ yrs. I'm trying to transition to the 5409A since the 5409 is obsolete. I had one of the boards stuffed with the 5409A. I switched out the chips supplying the CVdd to change from it from 1.8V to 1.6V. (I'm using the 160 MHz 5409A chip. The data sheet indicates the 160 MHz chip takes 1.6 V vs 1.5V with the 120 MHz 5409A.) I'm using a XDS510USB JTAG. It will usually successfully perform the emulator scan test but will not connect when entering debug mode in Code Composer 3.3 or 5. I get an error 0x80001200/-1052, emulator controller not responding. Is there something else I need to do? I have seen the app note SPRA684A about doing this conversion.