Answers Database
M1.4/M1.5 Map - FATAL_ERROR:x4kma:x4kmaaclk.c:145:1.16.12.2 - More than one driver on clock net.
Record #4146
Product Family: Software
Product Line: FPGA Implementation
Product Part: map
Product Version: 1.4
Problem Title:
M1.4/M1.5 Map - FATAL_ERROR:x4kma:x4kmaaclk.c:145:1.16.12.2 - More than one driver on clock
net.
Problem Description:
Urgency: Standard
General Description:
In M1.4:
FATAL_ERROR:x4kma:x4kmaaclk.c:145:1.16.12.2 - More than one driver on clock
net. $Net00001_. Process will terminate.
Please call Xilinx support.
In M1.5:
FATAL_ERROR:x4kma:x4kmaaclk.c:154:1.19 - More than one driver on clock net.
$Net00001_. Process will terminate.
Please call Xilinx support.
The cause of this problem may be that multiple TBUF outputs drive the input of
a clock buffer. MAP incorrectly has a fatal error when it sees more than one
driver on the net.
Solution 1:
This problem can be avoided by adding a buffer between the TBUF output net and
the input of the clock buffer **AND** putting a "KEEP" property on the output
net of the buffer to keep this buffer from being optimized away.
This problem is scheduled to be fixed in A2.1.
End of Record #4146 - Last Modified: 08/03/98 15:13 | 
