problem with ALtera CPLD

Sep 15, 2004 5 Replies
G

Hello I'm nev on this group and have following problem. I need to program EPM7064SLC44 using JTAG cable (ByteBlasterII) and Quartus



4.1 and it doesn't work Auto detection does not work either. When i connect EPM7128SLC84 all works, so cable and software is OK. I tried different chips (EPM7064SLC44 ones with different speed grades) and all don't work. i connected scope and TDI,TMS and TCK signals seems to be ok, but there is no TDO signal... Does anybody had similar problem? maybe there is something wrong with quartus? I used altera 7000 series chips and never had any problems (but never used
7064 one) Thanks for response Regards Greg



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L

I've not had any problems with the EPM7064BTC44-7 using Quartus and my own version of the ByteBlaster.

Leon

Leon Heller, G1HSM http://www.geocities.com/leon_heller
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R

You have the required pullups and pulldowns ?

1k up for TMS, TDI and TDO and 1k down for TCK. Plus there is whealth of pins that require a fixed connection. Documented in the *.RPT file as ASCII.

Rene

Ing.Buero R.Tschaggelar - http://www.ibrtses.com & commercial newsgroups - http://www.talkto.net
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G

Yes, i have all pullups and pulldowns, all signal except TDO look good, i mean levels. All grounds and supplies are also OK. Anyway instead of solving problem, i will change logic family to MAX3000A, which better suits my needs (3.3V)

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G

i just tried with another programmer - ByteBlasterMV and Max+PlusII and problem is exactly the same..it works with all the chips except EPM7064SLC44 i gave up with it and ordered EPM3064A, but it would be goot to know what is going on. any idea? regards Greg

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R

I also found in at least one case that re-soldering or re-heating the pins was of help in case of self soldered prototype.

Rene

Ing.Buero R.Tschaggelar - http://www.ibrtses.com & commercial newsgroups - http://www.talkto.net
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