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- Path: sparky!uunet!noc.near.net!news.bbn.com!bbn.com!ekearns
- From: ekearns@bbn.com (Edward Joseph Kearns)
- Newsgroups: comp.lsi.testing
- Subject: Re: Tons of 1149.1 experience...
- Date: 10 Nov 1992 00:59:14 GMT
- Lines: 54
- Message-ID: <lfu2b2INN491@news.bbn.com>
- References: <lfatgtINNj5@news.bbn.com> <BxD9CM.C1@scd.hp.com>
- NNTP-Posting-Host: bbn.com
- Keywords: help
-
- vinoski@ch.apollo.hp.com (Stephen Vinoski) writes:
-
- >This is fine for chip test, but for board test it would better if
- >there were only one controller for all the chips on the board. See
-
- A good time for me to clarify our present test philosophy...
-
- Actually, that is what we hope to accomplish. By placing a Micro-
- processor and one Test Bus Controller with multiple scan path linkers
- on the board, we can apply stimuli vectors, saved in an EPROM, to the
- "boundary" of one functional block of the board, then observe the
- response by collecting the resultant vector on other scan paths in
- other functional blocks.
-
- This "embedded test" will be used for connectivity testing between
- ASIC's where the number of functional ASIC stimuli vectors would be
- too high to apply in a timely fashion after power-up and before the
- system ready state.
-
- In case folks where wondering, yes there are plenty of non-scan parts
- on this board that I also have to write tests for. That's the part
- I've done before. And yes we will have approximately 6K scanable ASIC
- pins, plus some scanable registers and fifo's on the board as others
- have questioned. Sounds exciting I know!
-
- My final goal with the embedded test at power-up is only to achive a
- level of funtionality confidence, and not complete ASIC functionality.
- Thus the 1149.1 architecture features that we install will contain the
- "hooks" to perform more thorough testing on the manufacturing floor using
- a non-resident test processor in a PC for instance, as a diagnostic tool
- in module test or burn-in. Prior to this step, the ASIC's will have been
- tested at the foundary before pc board assembly and at the ATE station
- after pc board assembly.
-
- >In a previous life I wrote a lot of scan software. I found that the
- >use of object-oriented software development techniques greatly reduces
- >the chances for errors while allowing relatively powerful tools to be
- >developed quickly and reused for different applications.
-
- Others have mentioned the Object Oriented approach as a wise choice.
- Thank you for the advice and the references.
-
- Actually!, Thank you all for the many responses. Between all the phone
- calls with new vendor product leads, and all the new reading material,
- a a couple of well deserved vacation days, I've not had enough time to
- respond to everyone.
-
- Let's keep this discussion going. I still have a ton of questions...
-
- Ed Kearns
- BBNASD
- Bellevue,Washington
-
-
-