I programmed PIC16C74A/JW with code protect on.
The PIC did not work. Then erased about 1hr (normal 7 - 10 min)
and after programming with code protect off it worked.

So, let try to erase it longer time and may this helps.


Ivan Cenov
okto7@botev.ttm.bg



-----Original Message-----
From:   aj pollock [SMTP:ajpoll@NETCOM.CA]
Sent:   10 June 1998 07:17
To:     PICLIST@MITVMA.MIT.EDU
Subject:        dead pics?

Hello!
I have two pic16c57/jw eprom chips that may be useless trinkets.  After
being re-programmed approximately 40 times, my programmer tells me they
are not blank.
They usually take about 5 minutes to erase.  I have left them in the
eraser  for up to several hours.  A dump of each chip results in a 59
byte file that contains the following code:

:08100000FF0FFF0FFF0FFF0FB0
:021FFE000000E1
:00000001FF

This is the same file that results from a dump of  an empty programmer
socket.
Are these chips dead? If they are, how and why?
Any help will be appreciated.