Big Boy
Full Member level 4
how to work with xc3s400
Well, I try to download and only get errors. When doing IDCODE looping, I get error after something like 10 to 50 loops.
If I hold the FPGA in reset, or in PROG mode, the download and IDCODE looping work flawlessly.
The JTAG chain goes from Parallel-III interface -> XCF flash -> FPGA -> back to Parallel-III interface.
I don't think it's related to the parallel-III interface (though not 100% sure). I also tried with 2 different PC, and with setting interface level to both 2.5 and 3.3V. Does any one else have this board, and this problem? May be a design problem in the board.
Thanks
Well, I try to download and only get errors. When doing IDCODE looping, I get error after something like 10 to 50 loops.
If I hold the FPGA in reset, or in PROG mode, the download and IDCODE looping work flawlessly.
The JTAG chain goes from Parallel-III interface -> XCF flash -> FPGA -> back to Parallel-III interface.
I don't think it's related to the parallel-III interface (though not 100% sure). I also tried with 2 different PC, and with setting interface level to both 2.5 and 3.3V. Does any one else have this board, and this problem? May be a design problem in the board.
Thanks