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- From: dspstu18@cbis.ece.drexel.edu (Anthony Sama)
- Newsgroups: comp.lsi.testing
- Subject: Boundary Scan
- Message-ID: <1993Jan26.180613.4943@cbis.ece.drexel.edu>
- Date: 26 Jan 93 18:06:13 GMT
- Organization: Drexel University, College of Engineering, Philadelphia, PA
- Lines: 20
-
- Has anyone utilized JTAG boundary scan to perform tests of system logic?
- Specifically, I would like to do the following:
- 1) Scan in test data along the boundary scan register.
- 2) Allow the system to run for one clock cycle using data from the boundary
- scan register as input to the system logic.
- 3) Record the system outputs in the boundary scan register.
- 4) Scan out the results.
-
- My problem is with steps 2) and 3) above.
- If I use the Internal test, how do I allow the sytem to run for one clock
- cycle? Since the system clock is an input, it is unavailable. Do I simply
- let the system run for one cycle of TCK in the Run-test/Idle state of the
- TAP controller. Is there another way to do this without using the Internal
- test? Perhaps using the Sample test in conjunction with external system
- clock controls?
-
- Any help/pointers/suggestions would be greatly appreciated!
-
- Anthony Sama
- Drexel University
-