Hello,
 have anyone here successfully programmed
 a PIC 16F877 in-circuit in the low programming mode ?

 I'm using the PIC as an I/O processor together with
 a StrongArm processor and because of that I can't
 do a 'read data' after I have written the program since
 there are oneway 3->5V buffers between the strongarm
 and the pic processor.
 This also means I have to write my own programmer to
 programm the pic.

 Some questions:
 * Do you have to write the configuration word ?
 * Should MCLR\ and RB3 (PGM) be raised simultainiously or
   should I raise MCLR\ first and then RB3.
 * I have seen that 16F84 programmers do some command '1' and
   command '7' during erase what is this and are that neccesary
   for 16f877 ?

 Are there any open source programmer that can handle
 low voltage  programming ?

Thanks.
//Per B  perbo@pilotfish.net