Re: [avr-chat] AVRdude timeouts with CKDIV8 and 4MHz internal on t2313

[Preston Wilson]

"Johannes Bauer" wrote:

> Hello list,
> 
> I just wanted to ask if anyone else has trouble with avrdude the way I
> do: I have some tiny2313s which are preprogrammed with the CKDIV8 fuse
> and additionally have the 4MHz internal oscillator active. When I try to
> do anything with them using avrdude, the very first handshake (device
> signature) fails. Sometimes the first two bytes arrive OK, but the third
> is garbled, sometimes all bytes are trash. I do not remember the exact
> values I got, however.
> 
> When I enter Ponyprog I can program the devices fine. When I tell it to
> set the fuses to use an external crystal (slow rising power, no CKDIV)
> the device can be accessed just fine from avrdude also.
> 
> Programmer: STK200
> Cable length: around 20cm
> OS: Linux joelaptop 2.6.26.1 #9 PREEMPT Sat Dec 27 01:33:46 CET 2008
> i686 Intel(R) Pentium(R) M processor 1400MHz GenuineIntel GNU/Linux
> AVRDude: Version 5.5 (Gentoo package dev-embedded/avrdude-5.5)
> 
> If it is helpful to provide the exact output or more debugging info, I
> can flash back the fuses to the 4MHz osc. in order to reproduce the problem.

Use avrdude's -B option to slow down the ISP speed.  Try "-B 32" which will
work with clocks all the way down in the range of 128KHz.

-Preston