Answers Database

XCHECKER SOFTWARE 5.2.1: Error 264 : Done signal did not go high, Error 265 : Init still low


Record #1385

Product Family:  Software

Product Line:  FPGA Core

Problem Title:
XCHECKER SOFTWARE 5.2.1: Error 264 : Done signal did not go high, Error
265 : Init still low



Problem Description:
XCHECKER used on PC could return :
Error 264 : Done signal did not go high
or
Error 265 : Init still low


Solution 1:

One possible reason could be a Dos extender issue.
In this case try XCK88.EXE instead of XCHECKER.EXE.

xck88.exe is  is compiled with 16-bit integer and  xchecker.exe
is compiled with Metaware386.

For small and standalone environment, xck88 was prefered since
it takes much less memory.

XCK88.EXE is available on the Xact Step 5.2 or 5.2.1 CDs,
under the directory /XACT.



Solution 2:

The possibilites with error 264/265 is that the design has
not been configured properly.

1> Verify that you compiled your design for the correct part
type and package.

2> Make sure that you set the target FPGA for the serial
slave mode.  The xchecker only downloads in Slave Serial.
The mode pins <M0 M1 M2> on the FPGA should be set to <111>

3> Check all connections for slave serial. Remember that
connections to the FPGA differ slightly across the different
families.

4> Check the bitstream options in makebits or bitgen and
verify that you selected a pull-up for the DONE pin.

5> Check for noisy signals that may corrup the data or CCLK
going to the target FPGA.

6> Read the "Hardware & Peripherals", chapter 3, for
information on how to properly connect the xchecker to the
target FPGA.  Available at
ftp://ftp.xilinx.com/pub/documentation/xactstep6/hardware.pdf

7> For further debugging, read the app note,
"FPGA Configuration Guidelines". Available at
http://www.xilinx.com/xapp/xapp090.pdf



End of Record #1385