Answers Database

BOUNDARY SCAN/JTAG: How to 'turn on' jtag circuitry via XDE and EPIC forXC4K/XC5K devices


Record #1220

Product Family:  Hardware

Product Line:  4000

Problem Title:
BOUNDARY SCAN/JTAG: How to 'turn on' jtag circuitry via XDE and EPIC
forXC4K/XC5K devices



Problem Description:
Keywords: epic, xde, bscan, boundary scan, jtag, 4k , 5k, activate

Urgency: Standard

General Description:

How to turn on the Boundary Scan circuitry in the XC4K/XC5K
devices after configuration.






Solution 1:

1. Load the .lca file in XDE

2. type 'eb bscan'

This will bring up the editblock window for the BSCAN block.

3. In the editblock window, select the 'used' text, which is
   by the BSCAN line.  The user will see the 'used' text turn
   red.


4. type 'endblk'

5. The user should now see that the TAP pins and the BSCAN
   symbol are 'used'; The color of these blocks will have
   changed from yellow to gray.



Solution 2:

1. Load the .ncd file in EPIC

2. In EPIC, do a Find for the BSCAN site.

3. Select Edit -> Add.

4. Select the BSCAN site by clicking on it.

5. Now use Editblock to open the block.

6. Select the checkbox next to the 'USED' text. Save the .ncd
   file.



End of Record #1220