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AR# 41555

13.1 iMPACT - SVF files do not use "STATE RESET" for Virtex-6

Description

The Virtex-6 FPGAstatus read sequence included a STATE RESET line between the read of the STAT register and BOOTSTS register. This STATE RESET is not applied in 13.1. This can cause SVF failures on JTAG chains with more than one device in the JTAG chain. How do I work around this issue?

Solution

To work around this issue you can make the following changed to the SVF file commands -

From

// reading the bootsts register contents.
// Loading device with a 'cfg_in' instruction.
// Loading device with a 'cfg_in' instruction.
SIR 10 TDI (03c5) ;
SDR 320 TDI (0000000400000004b00000008001000c0000000400000004800340140000000466aa9955ffffffff) SMASK (ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) ;
// Loading device with a 'cfg_out' instruction.
SIR 10 TDI (03c4) ;
SDR 32 TDI (00000000) SMASK (ffffffff) TDO (00000000) MASK (1f000000) ;

To

// reading the bootsts register contents.
// Loading device with a 'cfg_in' instruction.
// Loading device with a 'cfg_in' instruction.
SIR 10 TDI (03c5) ;
SDR 320 TDI (0000000400000004b00000008001000c0000000400000004800340140000000466aa9955ffffffff) SMASK (ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) ;
// Loading device with a 'cfg_out' instruction.
SIR 10 TDI (03c4) ;
SDR 32 TDI (00000000) SMASK (ffffffff) TDO (00000000) MASK (1f000000) ;
STATE RESET;

This issue is resolved in 13.2.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
40503 13.x iMPACT - Known Issues for the iMPACT 13.x Software N/A N/A
AR# 41555
Date Created 03/31/2011
Last Updated 12/15/2012
Status Active
Type General Article
Devices
  • Virtex-6 CXT
  • Virtex-6 HXT
  • Virtex-6 LX
  • More
  • Virtex-6 LXT
  • Virtex-6 SXT
  • Virtex-6Q
  • Less
Tools
  • ISE Design Suite - 13.1