Keyword: 6.1i, iMPACT, program, CoolRunner, cool runner, 2C64, fail, read, protect, es, engineer, sample
When I program an XC2C64, programming fails, and iMPACT indicates that the device is in read-protect mode.
This problem has been fixed in the latest 6.1i Service Pack, available at:
The first service pack containing the fix is 6.1i Service Pack 1.
For the ES parts, please use 5.2i Service Pack3 to work around this issue. This can be downloaded from the WebPACK site at:
Once registered, click the "Earlier ISE WebPACK Releases" link on the right to download the 5.2i version.