Answers Database
LogiCORE PCI: STOP_IO asserted, S_TERM low, & S_READY is high in target app
Record #5688
Product Family: Software
Product Line: LogiCore
Product Part: PCI Target
Problem Title:
LogiCORE PCI: STOP_IO asserted, S_TERM low, & S_READY is high in target app
Problem Description:
Urgency: Standard
General Description:
Table 6-1 "Data Phase Control Signals for Targets" in the PCI32
User's Guide describes 4 conditions for a target application based
upon the values of S_TERM and S_READY. The second condition,
"Normal", states that STOP_IO is value logic high in this condition.
It is possible that STOP_IO may actually be logic low, despite
both S_TERM being low and S_READY being high.
Solution 1:
In a circumstance where an invalid address location (i.e. one that
does not end in a 0, 4, 8 or C) is supplied to the target, the target
may assert STOP_IO to indicate an invalid attempt at a transaction.
There are possibly other conditions which might cause STOP_IO
to be asserted.
End of Record #5688 - Last Modified: 03/24/99 11:13 |
