Hi Group Sorry im writting in English, but my written German is not good enought for explaning my problem, but please answer in German reading no problem :-) I have developed my own Xilinx SPARTAN3-400 board but have a problem when trying to connected via JTAG to the FPGA, i am using the USB Cable from Xilinx but with out luck. There is only one FPGA in the chain, i have rechecked power sequencing, and recehecked the connection to the FPGA JTAG/POWER/Ect. The ID code i can read from the spartan via Chain debug in Impact: 00000000000001111000011110111111 I have tested when a eval board from memec with the same FPGA which returns: 00000001010000011100000010010011 I really dont have any ideas more whould could be the problem, are there somebody how can give me a hint to would me could be te problem ? Thanks a lot in advance Best regards René
1 | Programmer TDI --> FPGA TDI |
2 | FPGA TDO --> Programmer TDO |
You've double checked this? Do you have pullups on the TDI- and TDO-Pins?
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