AR# 32867: Spartan-6 FPGA Integrated Block Wrapper v1.1 for PCI Express - Designs which use the cfg_pm_wake_n input to generate a PME event should implement a timeout counter
AR# 32867
Spartan-6 FPGA Integrated Block Wrapper v1.1 for PCI Express - Designs which use the cfg_pm_wake_n input to generate a PME event should implement a timeout counter
Description
If a PME message is not acknowledged by the host within 100 ms (+50%/-5%) of clearing the PME Status bit, the Endpoint is required to re-transmit. This functionality is not provided by the Spartan-6 FPGA Integrated Block for PCI Express.
Solution
The user design must implement the timeout counter and re-transmit logic in fabric. This process will be documented in the ISE Design Suite 11.3 User Guide.
For other Spartan-6 FPGA Integrated Block Wrapper v1.1 for PCI Express Known Issues and Release Notes, see (Xilinx Answer 32743).
This issue is resolved in ISE 11.3 software and Spartan-6 FPGA Integrated Block Wrapper v1.2.