Answers Database
Virtex Configuration: DriveDone polarity is incorrect in XAPP151
Record #7976
Product Family: Hardware
Product Line: Virtex
Product Part: Virtex General Hardware
Problem Title:
Virtex Configuration: DriveDone polarity is incorrect in XAPP151
Problem Description:
Urgency: Standard
General Description: What is the correct polarity of DriveDone in the COR register?
Solution 1:
In (Xilinx XAPP151) DRIVE_DONE is specified in the COR (Configuration Option Register) as:
0: DONE pin is actively driven high (default)
1: DONE pin is open drain.
This is incorrect. The polarity is reversed. In fact, it should read
0: DONE pin is open drain (default).
1: DONE pin is actively driven high.
Bitgen is correct in the polarity of DriveDone, only XAPP151 is in error. It will be changed in the
next revision.
End of Record #7976 - Last Modified: 11/01/99 12:05 |
