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Altera_Forum
Honored Contributor
18 years agoProblem when doing a bulk erase using JTAG
Hello, I am trying to bulk erase a EPM7512AETC144-10 using a 68HC09 microcontroller connected to the JTAG pins of the MAX7000. According to the SVF file, a bulk erase requires the following in...
Altera_Forum
Honored Contributor
18 years agoMy recommendations:
1. Check the TDO output with the scope as well. It should be high-z in all TAP controller states except shift DR and shif IR. So you can see if you managed to move the TAP controller to the appropriate state. 2. There should be a TAP controller reset at the very beginning of your sequence PTD_PTD0 = 1; //TMS=1 for (j=0;j<5;j++)clock_Cycle(); // test logic reset PTD_PTD0 = 0; //TMS=0 clock_Cycle(); // test idle PTD_PTD0 = 1; //TMS=1 ... Hope that helps, Harald