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Plea for help with MAX7000S

Hello,

Some time ago I bought a box of surplus EPM7128SLC84 CPLD's for the more advanced pupils at my school to have a play with. It was to be a learning exercise for us all, something different to MCU's.

Unfortunately, I've just found out (I think) that they all have their jtag pins programmed as user I/O. I can't program them with my byteblaster, although it works fine with a smaller (new) CPLD I bought. I wasn't aware of this potential problem before.

The error from Quartus Programmer is: Info: Unrecognized Device Error: JTAG ID code specified in JEDEC STAPL Format File does not match any valid JTAG ID codes for device Error: Operation failed

Nor will the Quartus programmer auto-identify the devices, saying "Can't scan jtag chain", again it works fine with the new one.

First, does my assumption here sound correct?

Second, is there any way to clear the jtag pins without a Master Programmer? (Google thinks the answer is no, but it's worth asking)

Third, is there anyone who has a Master Programmer or other capable programmer (in the UK, preferably near Manchester) and would be prepared to help me out and reprogram about 25 CPLD's? I don't mind donating a few beer tokens if it will help!

Rick Fox (Belmont Special School) Manchester, UK.

Reply to
Rick Fox
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Hi Rick,

Unfortunately, the 'S' in the EPM7128SLC84 part indicates that this part cannot be programmed with a byteblaster cable. The new part that can be programmed is probably an 'A' part i.e EPM7128Axxx.

It might be worth contacting an Altera FAE to see whether they are willing to program these parts for you.

Regards Ben

Reply to
Ben Popoola

Read the first paragraph of the ByteBlasterMV datasheet. The MAX 7000S is the second device mentioned.

--

Wing Wong.
Webpage: http://wing.ucc.asn.au
Reply to
Wing Fong Wong

The S says it can be programmed with the BB cable, although the Jtag pins can be programmed as IO, disabling the Jtag interface with no way os bringing it back AFAIK without a master programmer.

Ricardo

Reply to
Ricardo

We have old Altera programming hardware, and an 84PLCC module for it. It's ISA only, which may cause fun! I assume that the modern software can handle it, dunno if we have any older CDs easily to hand.

Contact me offline if you're interested.

Cheers, Martin

--
martin.j.thompson@trw.com
TRW Conekt, Solihull, UK
http://www.trw.com/conekt
Reply to
Martin Thompson

Whoops, my mistake.

Reply to
Ben Popoola

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