CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to support@ccsinfo.com

ICD U64 pgc dead. Fix and why didnt they tristate?

 
Post new topic   Reply to topic    CCS Forum Index -> CCS ICD / Mach X / Load-n-Go
View previous topic :: View next topic  
Author Message
mds



Joined: 06 Nov 2005
Posts: 29

View user's profile Send private message

ICD U64 pgc dead. Fix and why didnt they tristate?
PostPosted: Thu Apr 19, 2012 5:49 pm     Reply with quote

Hi All,
For quite some time most of our boards use the pgc,pgd pins for mode indication via LEDS, having used another programmer this has never been a problem.
However the U64 does not tristate and so after programming one has to remove the header so as to monitor the LEDS.
We have just had to put up with this since we switched to these programmers.

The other day one of our field U64s turned up here as faulty.
After pulling it apart I found the TC7WH125FKFCT-ND chip that drives the PGC pin to be defunct. Who knows what the field boys did to it.
After replacing said chip, the one near the LED, all was well again. It did however cause me to ask the question. Why is the U64 not utilising the tristate feature of this driver chip? In both cases the "enable"pin of these chips is connected to power rail. It would have been simple to drive this from the many "spare" PIC IO pins. A bit of a CCS oversight? Or am I missing something?

The part is available from digikey In case anyone else has "all thumbs" field techs and find a dead pgc or pgd output.
It is a little tricky to hand solder but it is doable.

Error created was: unable to ID target device.
Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> CCS ICD / Mach X / Load-n-Go All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group