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Cant program PIC18F2331 and 4331!!!

 
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daviz



Joined: 19 Nov 2004
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Cant program PIC18F2331 and 4331!!!
PostPosted: Wed Dec 22, 2004 2:23 am     Reply with quote

Hi,

I have just upgraded the C complier software.
I am new, can someone help me in getting my PIC18F2331 to work?

I have CCS C complier + ICD-U40. I am sure that I wire the programming pins correctly.
But I could not program the chip.
I tried to press "Test Target", it shows
"Unknown PIC18 device, ID: 0101 if there is a valid id, then make sure algorithm inside is set correct."

what should i do now?

Thanks alot

Regards,
Daviz Crying or Very sad
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PostPosted: Tue May 03, 2005 11:57 am     Reply with quote

There is additional pin #7 (AVdd) on this device. You should tie this pin to +5v in order to program correctly your device.
PCM programmer



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PostPosted: Tue May 03, 2005 12:21 pm     Reply with quote

It's not just the AVdd pin which must go to +5v. There is also an AVss
pin which must be connected to ground.

Go into MPLAB vs. 7.10 Help, for the ICD2. Buried deep within the
help file is a section on limitations:
Quote:
PIC18FXX20/XX31 Limitations
You must connect the AVDD and AVSS pins for the device to program.

Yes, this is for ICD2, but this is a hardware limitation of the PIC,
and thus it will also apply to the CCS ICD.
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