hi guys,
i’ve the following problem.
from many weeks, i’m trying to program a pic16f877A via ICSP with my velleman k8048 serial programmer, using winpic sw
those are the cable connections:
programmer: PIC:
1 VPP 1 MCLR
2 VDD 11 + 32 VDD
3 GND 12 + 31 VSS
4 PGD 40 DATA
5 PGC 39 CLOCK
36 RB3 —> a GND via 1 K restistor
i’ve tried to put a 100nf capacitor between vdd e vss, and two 1nF capacitors respectively between PGD and GND and between PGC and GND
i verified voltage … there are 5v between vdd and gnd and 12v between tra MCLR e GND when i start programming
my icsp cable lenght is about 5 cm…
there is nothing to do… , in practice when winpic try to verify,after writing, he find several verification errors, like this:
Verify Error: 000000: read 003FFF, wanted 003000.
as far as i can understand , it seems that it’s not possible to write pic
can someone help me? it’s very important for me… and i’m loosing the hopes…
thankyou in advance
