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BOUNDARY SCAN/JTAG: When is Boundary Scan available for use in the XC4000 and XC5200 devices


Record #1215

Problem Title:
BOUNDARY SCAN/JTAG: When is Boundary Scan available for use in the
XC4000 and XC5200 devices



Problem Description:
Keywords: bscan, boundary scan, jtag, xc4000, xc5200

Urgency: Standard

General Description:
When are the Boundary Scan instructions available in the XC4K/XC5K devices?


Solution 1:

Boundary scan is available in the XC4000 family and the XC5200 family
devices before and after configuration. Limited boundary scan
instructions are available during configuration.

If the user wants to use boundary scan after configuration, then the
user must place the BSCAN symbol and TAP pins in his schematic, or instantiate
the BSCAN symbol and the TAP pins in his HDL code.

If the user is only interested in using Boundary Scan before the
FPGA is configured, then the user doesn't need to put the BSCAN symbol
and TAP pins in his design at all.

If the design has already been compiled, Boundary Scan can be turned on
via XDE or EPIC. Refer to <a href="/techdocs/1220.htm>solution 1220</a> for deta
ils on how to do that.



End of Record #1215