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Author Topic: Burning PLCC Sigma 1700 chips  (Read 4576 times)
cfh
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« on: March 31, 2009, 04:58:44 PM »
The Sigma uv1700 uses PLCC chips instead of EPROMs for the
roms at U51 and U52. If you own a Sigma 1700, at some point
you will probably need to burn a PLCC. The PLCC does not look
like an EPROM, but essentially they are a 4meg EPROM.

The blanks (PLCC 27c040 or 27c4001, 32 pin) can be bought from
Mouser.com just search on "PLCC 27c040", part number 511-M27C4001-10C.
Cost is about $3 each.

In order to burn the PLCC, you need a PLCC adaptor. With this
PLCC-to-32pinDIP tool, a regular EPROM programmer can burn
the PLCC. No special software is needed. (I'm using an old
Needham PB-10 programmer without any problems).
You can buy the adaptor for about $25 on ebay. Here's the one i got:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=360098687008
Cheaper versions are available, but this particular one has an
easy in/easy out PLCC socket, so that's why i spent a little more
money than the $10 elcheapo variants.
« Last Edit: May 17, 2009, 10:49:15 PM by cfh » Logged
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