12f675 pic programme error

[klpkumara]

I have JMD programmer design for multi pic programming . but 12f675 can't programme using it .it work well with 16f84a chip  plese tell anyone about good circuit diagrame to made for better programming .I'M poor anf can't buy a expencive programmer .please help me .

[threewheeler7]

klpkumara wrote:

I have JMD programmer design for multi pic programming . but 12f675 can't programme using it .it work well with 16f84a chip

ok a couple things, one if it programs your f84, your looking good, check your pinout and check it again. if you must, for troubleshooting, put your 12f chip in a breadboard and run wires over from your programmer,(gnd,vcc,vpp,clock,data) to the chip. if that does dot work, check your voltage between vpp and gnd. (if you are using ic-prog you can turn on the individual signals for testing) you may not be getting sufficient programming voltage, a lot of the 12f chips have a smaller tolerance for this. if this is the case, try another computer if one is available, some modern serial drivers dot supply enough power, otherwise you need an external PS. tell me how that works out.

[Jan-Erik Soderholm]

> klpkumara wrote:
>> I have JMD programmer design for multi pic programming . but 12f675 can't
>> programme using it .it work well with 16f84a chip
>>

Actual programmer design ?
Software ?
Int-MCLR enabled ?

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[Bob Axtell-3]

I think I'd buy a PICKIT2 or Wouter's small programmers, if I were
you. VERY inexpensive these days...

Bob A

On 7/16/08, Jan-Erik Soderholm <jan-erik.soderholm@...> wrote:

>> klpkumara wrote:
>>> I have JMD programmer design for multi pic programming . but 12f675
>>> can't
>>> programme using it .it work well with 16f84a chip
>>>
>
> Actual programmer design ?
> Software ?
> Int-MCLR enabled ?
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>

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[klpkumara]

Thanks i found error in programming voltage thanks for your help

threewheeler7 wrote:

klpkumara wrote:

I have JMD programmer design for multi pic programming . but 12f675 can't programme using it .it work well with 16f84a chip

ok a couple things, one if it programs your f84, your looking good, check your pinout and check it again. if you must, for troubleshooting, put your 12f chip in a breadboard and run wires over from your programmer,(gnd,vcc,vpp,clock,data) to the chip. if that does dot work, check your voltage between vpp and gnd. (if you are using ic-prog you can turn on the individual signals for testing) you may not be getting sufficient programming voltage, a lot of the 12f chips have a smaller tolerance for this. if this is the case, try another computer if one is available, some modern serial drivers dot supply enough power, otherwise you need an external PS. tell me how that works out.