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
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