04-24-2019 10:12 PM
First post here. Absolute beginner :)
I am using CPLD XC2C64A.
Everthing works fine on the development board.
Then, I sent the .jed file along with my PCB design to the assembly factory.
When it came back, the CPLD is not working as expected.
I suspect my JTAG interface is not configued correctly.
Are TDI, TDO, TCK, TMS pulling high/low or floated when they are not being used?
If pulling high, do I connect it with resistors?
I googled for a long time, and it seems they need to pull up but not 100% sure.