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Problems with ICD-U40 and PIC18F6722

 
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Kieran



Joined: 28 Nov 2003
Posts: 39
Location: Essex UK

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Problems with ICD-U40 and PIC18F6722
PostPosted: Mon May 09, 2005 6:30 am     Reply with quote
I am trying to migrate from a PIC18F6722 running at 20MHz (HS) to a PIC18F6722 running at 40MHz (10MHz H4). The hardware is identical except for the crystal and PIC.

ICD Control program is version 2.30

My ICD-U40 works fine with the 6720 chip but is very intermittent with the 6722. I have just managed to program a 6722 but pressing run causes the following error

Quote:

Could not release reset: Could not detect target chip


Test target then reports Unknown PIC18 ID 1400
To recover I have to shut down the control program.

Any Ideas?
Nandini



Joined: 13 Jul 2005
Posts: 15

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PostPosted: Wed Jul 13, 2005 12:47 pm     Reply with quote
Try using the latest ICD softare from the web and email tech support it is still an issue.
sseidman



Joined: 14 Mar 2005
Posts: 159

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Re: Problems with ICD-U40 and PIC18F6722
PostPosted: Wed Jul 13, 2005 1:04 pm     Reply with quote
Kieran wrote:
I am trying to migrate from a PIC18F6722 running at 20MHz (HS) to a PIC18F6722 running at 40MHz (10MHz H4). The hardware is identical except for the crystal and PIC.

ICD Control program is version 2.30

My ICD-U40 works fine with the 6720 chip but is very intermittent with the 6722. I have just managed to program a 6722 but pressing run causes the following error

Quote:

Could not release reset: Could not detect target chip


Test target then reports Unknown PIC18 ID 1400
To recover I have to shut down the control program.

Any Ideas?



I think I had a similar problem once, and IIRC, the chip needed to be physically powered down and powered back up after the fuse was changed.

Scott
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