vinodkumar
Full Member level 5
Hello ALL<
1)i am using xilinx USB jtag cable,and led always showing green even not giving vref.
2)i am sure the usb cable is working becoz another demo board is working with the same.
3)when i am connecting to my custom board it is showing green and i am seing reference voltage to be at 1.5V
4)the same vref voltage connected to demo board is 1.2V
5)to the same custom board jtag worked earlier.
but suddenly this problem started ,and i am unable to program the board,i removed prom and tied tdi to tdo of prom so that i can access fpga only and it worked.
but when prom is replaced back,vref is going to 1.5V and tdi to 1.72 but not knowing why mal function,.
help needed ...
1)i am using xilinx USB jtag cable,and led always showing green even not giving vref.
2)i am sure the usb cable is working becoz another demo board is working with the same.
3)when i am connecting to my custom board it is showing green and i am seing reference voltage to be at 1.5V
4)the same vref voltage connected to demo board is 1.2V
5)to the same custom board jtag worked earlier.
but suddenly this problem started ,and i am unable to program the board,i removed prom and tied tdi to tdo of prom so that i can access fpga only and it worked.
but when prom is replaced back,vref is going to 1.5V and tdi to 1.72 but not knowing why mal function,.
help needed ...
