ok.... i think i saw that before, but it didnt make any sense... i think i get it now...
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ok.... i think i saw that before, but it didnt make any sense... i think i get it now...
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Somethings confusing me here.
<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2301&stc=1&d=120156330 8" />
The schematic shows GND on pin 1 of the ICSP connector.
But Pin2 (+5V) goes to the center pin of the resonator.
Is the schematic wrong? Or am I looking at the pins wrong?
<br>
DT
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just going through the datasheet for the 6680 again, it says i may need a resistor between OSC2 and the resonator if its an AT strip cut crystal... how do i know if i need that resistor???
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Darrel, i just looked at it, and i thought you had found it.. i stuck my meter on it and it says its correct. so i went back to the schematic and looked. its the otehr 5-pin header on the schematic that is for ISCP, the one you highlighted goes to the other board, and comes from the power supply. its the straight header on the board.
i wish you were right... then i would actually know what i did wrong...
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Yup, should have, should have seen that.
Can you show the board layout's?
It's hard to follow past the via's.
<br>
DT
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ill see what i can do about the layout.. ive looked over it and it seems ok, but what do i know!!! i used eaglecads autoroute function so everything "should" be connected properly...
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theres the image of the board, and i will attach the eagle file here too.
i labelled all the "important" pins. the rest go to I/Os.... and MCLR2 resistor, is a 1Mohm resistor, and its for PGM. i just didnt relabel it when i put it in there... and there was an issue with the gnd side of the caps, so i ran a jumper wire from there to the ground pin..
Last edited by dragons_fire; - 29th January 2008 at 03:02.
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Probably another wrong one, but I can't tell from the picture.
Looking at some of the holes, they don't seem to be plated thru.
It could be reflections from the other side or something.
<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2304&stc=1&d=120158257 0" />
Where it would matter the most (if true) is on the +5V pin on that connector I should have been looking at the first time.
It doesn't have a good solder joint on the top layer, which is the side the trace connects to.
<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2305&stc=1&d=120158283 4" />
If the thru-hole plating is intact, it probably won't matter.
<br>
DT
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