Hi,

Dave Madden says:

> so once CP is set, the part is no longer programmable.  (If you're
> listening, Microchip, you should add a serial-mode command to do a
> bulk erase.)

I've found that using the parallel algorithm for bulk erase works
in serial mode too.  Here is a C code fragment that does this (use
your imagination for the functional behaviour of command(), out_word()
and delay() :-)

   command(LDCONF);
   out_word(0x3FFF);
   for ( i=0; i<7; ++i )
      command(INCADD);
   command(1);
   command(7);
   command(BEGPRG);
   delay(PRGDLY);
   command(1);
   command(7);

Hope that helps.

David