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Kieran
Joined: 28 Nov 2003
Posts: 39
Location: Essex UK
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| Problems with ICD-U40 and PIC18F6722 |
 Posted: Mon May 09, 2005 6:30 am |
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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
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Test target then reports Unknown PIC18 ID 1400
To recover I have to shut down the control program.
Any Ideas? |
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Nandini
Joined: 13 Jul 2005
Posts: 15
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| Posted: Wed Jul 13, 2005 12:47 pm |
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| Try using the latest ICD softare from the web and email tech support it is still an issue. |
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sseidman
Joined: 14 Mar 2005
Posts: 159
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| Re: Problems with ICD-U40 and PIC18F6722 |
| Posted: Wed Jul 13, 2005 1:04 pm |
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| 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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