by namlet on Sat Feb 18, 2006 12:16 pm
HI
I have built this programmer and all works fine except ICSP does not seem to function (can not read and write chip) .I am using a test circuit by MICROCHIP running at 20 mhz (on board crystal) which works with another (Wilhelm) programmer. the chip I am trying to program is a 16f877/A I am using the high voltage programming method and the software appears to suggest that every thing is o.k. but the chip(s) do not read or write !........any ideas please?
Thanks
AJ
HI
I have built this programmer and all works fine except ICSP does not seem to function (can not read and write chip) .I am using a test circuit by MICROCHIP running at 20 mhz (on board crystal) which works with another (Wilhelm) programmer. the chip I am trying to program is a 16f877/A I am using the high voltage programming method and the software appears to suggest that every thing is o.k. but the chip(s) do not read or write !........any ideas please?
Thanks
AJ
