18F4431 won't let in code

aaaaamartin · Joined: 17 Apr 2005 Posts: 39 Location: Germany Stuttgart

Hi,

I recently ordered 5 x 18F4431 PDIP, and 3 x QFN.

The first Chip I tried works flawlessly, however the other CHIPS
don't take a single instruction into flash.
I can read what is in the Flash, but not write.

I use a Tait like burner and freeware soft, as described here.
http://www.sprut.de/electronic/pic/brenner/index.htm#brenner5

&

http://www.sprut.de/electronic/soft/p18/p18.htm

Of course this behaviour can be software and / or burner based,
but why does it work with one of the Chips ?

I'm confused !

Thanks for suggestions.

Martin

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

http://www.ccsinfo.com/forum/viewtopic.php?t=20466

aaaaamartin · Joined: 17 Apr 2005 Posts: 39 Location: Germany Stuttgart

HI,

I've connected all four supply pins.
Makes no difference with the working device, if you only connect two.

Martin

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

The programmer software for the 18F4431 is experimental. It may
not work properly. The web page says:

asmallri · Joined: 12 Aug 2004 Posts: 1635 Location: Perth, Australia

Have you disabled LVP or pulled up the LVP pin?
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!

aaaaamartin · Joined: 17 Apr 2005 Posts: 39 Location: Germany Stuttgart

Hi,

just finished my ICD2-clone.

See www.stolz.de.be for details.

Everything workin ' now !

Thx
Martin