The problem with the thrice-damned R4 and R7 is that they prevent the USBTiny from dragging the data lines high/low reliably if there is any other load on the ATMega's pins. Jumpering them allows the USBTiny to force the pins high/low even with other crud attached.
The power control is handled by the jumper in the USBTiny and has nothing to do with R4/R7.
Need some help programming Ice Clock
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20 posts • Page 2 of 2 • 1, 2
Re: Need some help programming Ice Clock
by pstemari » Sat Dec 04, 2010 12:56 am
--Paul
A wholly owned subsidiary of:
Persephone: DL R+W+B C 7 X L W C++ I++ T+ A E H++ S+ V-- F+ Q P B PA+ PL
Aldebaran: DM Rt H 5 Y L- W+ C+ I++ T++ A+++ E H++ S+ V+ F++ Q+ P B++ PA- PL--
A wholly owned subsidiary of:
Persephone: DL R+W+B C 7 X L W C++ I++ T+ A E H++ S+ V-- F+ Q P B PA+ PL
Aldebaran: DM Rt H 5 Y L- W+ C+ I++ T++ A+++ E H++ S+ V+ F++ Q+ P B++ PA- PL--
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Re: Need some help programming Ice Clock
by adafruit » Thu Jan 13, 2011 6:52 pm
we suggest following the other users's suggestions and purchasing some new DIP 168V chips from mouser or digikey
http://www.ladyada.net/wiki/partfinder/microcontroller has links to get you started
http://www.ladyada.net/wiki/partfinder/microcontroller has links to get you started
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Re: Need some help programming Ice Clock
by jld » Sun Jan 16, 2011 4:47 pm
Do I want a ATMEGA168V-10PU-ND or a ATMEGA168V-10PU? I'm not sure what the ND suffix specifies.
Thanks!
Thanks!
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Re: Need some help programming Ice Clock
by adafruit » Sun Jan 16, 2011 6:59 pm
ND means "Digikey product #"
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Re: Need some help programming Ice Clock
by jld » Wed Jan 19, 2011 8:44 pm
Just an update for everyone who may come with the same issue. Got new a Atmega168V from digikey. Plugged it in, flashed it, and it booted right up.
Guessing I fried the chip with my USBTiny. Either an issue with a cold soldered joint or the R4/R7 resistors/jumpers.
Thanks for everyone's help, I now know what time it is again.
Guessing I fried the chip with my USBTiny. Either an issue with a cold soldered joint or the R4/R7 resistors/jumpers.
Thanks for everyone's help, I now know what time it is again.
- jld
- Posts: 34
- Joined: Sun Jun 21, 2009 1:35 am
20 posts • Page 2 of 2 • 1, 2
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