1.26 Release: Description and Explanation of Changes

- Absolute Min available

- Updated Clock Tree delays

- Updated Device Modeling

1.25 Release: Description and Explanation of Changes

- Updated PCIe Delays

- Updated DCM Delays

1.23 Release: Description and Explanation of Changes

- Updated PCIe delays

- Decreased hold times on IFF in IOB

- Updated IDELAY values

1.21 Release: Description and Explanation of Changes

- Updated BUFGMUX delays

- Updated PCIe delays

- Updated IOB delays - IBUF Delays

- Updated DCM Changes

- Fixed Hold violation on DDR paths

- Changed speed grad to PRODUCTION for all devices for -4 & -5

1.19 Release: Description and Explanation of Changes

- Updated IBUF and IFD delays

- Updated PCIe delays

1.18 Release: Description and Explanation of Changes

- 3s100e, 3s500e, and 2s1600e in speed grade -4 have a status of PRODUCTION

- Increased block RAM setup time

- Increased setup time on CE pin on SLICEL flip-flops

- Set SLICEM RAM hold time to zero

- Increased setup time on DI pins on SLICEM RAM

- Increased setup time on REV and INIT pins on SLICEL flip-flops

- Increased setup time on REV pin on IOB IFF

- Increased hold time on DIN pin on IOB IFF

- Reduced delay through the DCM component

1.17 Release: Description and Explanation of Changes

- Increased setup time on DI pins on block RAM

- Updated Multiplier delay values

- Updated DCM frequency check values

1.16 Release: Description and Explanation of Changes

- Increased delays in -4 speed grade by 4% for LUT delays

- Decreased delays in -4 speed grade by 4% for FXMUX and GYMUX delays

- Overall speed increase of about 6% over v1.13

- -5 speed grade are 15% faster than -4 speed grade

1.15 Release: Description and Explanation of Changes

- Added support for -5 speed grade

- Updated -4 and -5 speed grades to ADVANCED

- Updated setup/hold values based on measurements

- Updated DCM frequency values

- Overall values are based on measurements

1.13 Release: Description and Explanation of Changes

- Updated PCI Delay types

1.12 Release: Description and Explanation of Changes

- DCM in Low Frequency mode is 5 to 280 MHz, instead of 24 to 280 MHz

- Speed Grade -4 was changed to Advanced

- Updated setup values for Distributed RAM and Shift Registers

- Added support for PCILOGICSE components

- Added new I/O Standards and removed unsupported ones

For the current speed file versions with respect to design tool releases, see (Xilinx Answer 12201).