Answers Database
2.1i COREGEN, C_IP3: Synchronous INIT control does not work when "Restrict Count" option is selected for Virtex Binary Counter
Record #8153
Product Family: Software
Product Line: LogiCore
Product Part: Coregen IP Modules
Problem Title:
2.1i COREGEN, C_IP3: Synchronous INIT control does not work when "Restrict Count" option is
selected for Virtex Binary Counter
Problem Description:
Urgency: hot
General Description:
There is a bug in the Virtex Binary Counter in which the logic associated with SINIT
(Synchronous Initialize) is not generated when you generate the counter with a "Count To" value spec
ified.
(Before you can specify the "Count To" value, you must first activate the "Restrict Count"
option in the Binary Counter GUI.)
As a result of this bug, the Counter does not get initialized with the user-specified initial value
when SINIT is asserted. The bug is actually in the implementation netlist, so the symptoms
can be observed during both post-NGDBUILD and timing simulation.
Solution 1:
As a workaround, regenerate the core with a LOAD input and use it to load the desired
initial value from the L input instead.
End of Record #8153 - Last Modified: 12/06/99 20:13 |
