On Mon, 19 Mar 2001, Martin Hill wrote:

> Hi everyone.
>   I've previously been using an EPICPlus Programmer to program
> my 16F876s.  This was taking around 60s for each one.  On my
> new computer it kept coming up with errors, so I thought I would
> make myself a programmer.  This is based on a 16F876 (I've got a
> lot of them).  Basically you download the .hex file over the serial port
> and it is stored on eeprom.  From here it is programmed onto the
> PIC.  According to the programming data sheet, programming
> takes nominally 2ms per memory location, maximum 4ms.  I have
> set my programmer to start with a small delay, write the memory
> location, read it back and check it.  If the data is not correct then it
> increases the delay and writes again.  Using this method, a
> 16F876 is programmed in around 18s.

Odd.  I also use an EPIC+.  When I program a 16F877 it only takes around
15-20 seconds for about 6K of program space.  Wonder why some people see
significantly longer times?  I wonder if this is related to maybe an out
of spec Vpp - have you hung a meter on yours lately to check it?  There's
an adjusting pot for it.

Dale
---
The most exciting phrase to hear in science, the one that heralds new
discoveries, is not "Eureka!" (I found it!) but "That's funny ..."
                -- Isaac Asimov

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