We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 30640

LogiCORE Generic Framing Procedure (GFP) v2.1 - Release Notes and Known Issues for the GFP Core (ISE 10.1 IP Update 1)


This Release Note is for the Generic Framing Procedure (GFP) Core v2.1. The core is being re-released in 10.1 IP Update 1 to be fully compatible with ISE 10.1.

- New Features

- Bug Fixes

- Known Issues

For IP Update install instructions and requirements, please refer to:



New Features in v2.1

- ISE 10.1 design tools support

- Virtex-5 Support

Bug Fixes in v2.1

- None

Known Issues in v2.1

- CR 304087: M_SYS_FM_RDY_N may not correctly signal the end of a superblock

To work around this issue, the user can count the number of qwords received using the signals M_SYS_SRC_RDY_N and M_SYS_DST_RDY_N. Based on the type of core traffic the core is set to receive (e.g., PLI), the user can determine when a superblock is ending and can then switch channels.

-CR 475981: Hardware timeout counter is not properly disabled. The core might stop functioning in the device after two hours.

See (Xilinx Answer 31260).

AR# 30640
Date Created 04/22/2008
Last Updated 12/15/2012
Status Active
Type General Article