Answers Database
Virtex CLKDLL: How to make sure the DONE does not go high until the CLKDLL has been locked
Record #7852
Product Family: Hardware
Product Line: Virtex
Product Part: Virtex General Hardware
Problem Title:
Virtex CLKDLL: How to make sure the DONE does not go high until the CLKDLL has been locked
Problem Description:
Urgency: Standard
Problem Description:
DONE pin indicates the configuration process is over, and the device is in
the Startup sequence. By default the configuration startup sequence does
not wait until the CLKDLLs have locked. How to make sure the DONE does
not go high until all the CLKDLLs are locked?
Solution 1:
This is a two step process:
1. Attach the STARTUP_WAIT attribute to the CLKDLL in the ucf file
INST <DLL instance name> STARTUP_WAIT=TRUE;
2. Use the following option in bitgen program:
-g LCK_cycle:3
End of Record #7852 - Last Modified: 10/12/99 11:10 |
