At 08:27 24/01/99 PST, you wrote:

He he, wish I had a dollar for everyone who has came up against this
problem.  I spent days on it myself.

These days just about everyone uses the "code protection killer" to do a
bulk erase as that seems to work without any hassle.

I do know of at least one person who has got the bulk erase stuff to
work but he has never spilt the beans as to the secret.

Jim



>Hi,
>
>I'm working on a PIC16C84 programmer project. All programming commands
>given in DS30189D documentation from Microchip are working fine except
>for "BULK ERASE PROGRAM MEMORY" and "BULK ERASE DATA MEMORY" witch are
>001001 and 001011 respectively.
>
>For example, in chapter 2.3.1.8 (BULK ERASE PROGRAM MEMORY)
>the doc says:
>1- Do a "Load Data All 1's" command
>2- Do a "Bulk Erase User Memory" command
>3- Do a "Begin programming command"
>4- Wait 10 ms to complete bulk erase
>
>so, my programmer send:
>1- 000010 0111111111111110
>2- 001001
>3- 001000
>4- wait 10 ms
>
>When I read back the chip, no location of the Prog Mem changed,
>am'I missing something or is there some mistakes in DS30190D.
>Any idea ?
>
>Note: I can do the equivalent operation by writing 3FFF in all program
>memory locations but this consumes much more time.
>
>Thanks for your time and attention.
>
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com
>
--------------------------------------------------------
Jim Robertson
Email: newfound@pipeline.com.au

http://www.pipeline.com.au/users/newfound
--------------------------------------------------------