Yahoo Groups archive

AVR-Chat

Index last updated: 2026-04-28 22:41 UTC

Message

Re: [AVR-Chat] AVRISP -> AtTiny Communication Problem

2010-01-18 by Kenny M.

Sorry guess my other message was kind of confusing.
Well I found a test clip I had bought for this and forgot about.

So another new chip put into the test clip.
Everything hooked up correctly, 100% sure.
10k between reset and vcc.

Power up chip, power up isp, avr studio reads 5V on circuit.
But the same error when reading...

I tried all this on my other PC which is still running XP.
I tried the current, and two previous versions of avr studio just for the hell of it.

Idono...either I'm an idiot or this programmer is screwed up I guess???
Hopefully the later LOL :p

----- Original Message -----
From: "H. Carl Ott" <hcarlott@gmail.com>
To: AVR-Chat@yahoogroups.com
Sent: Sunday, January 17, 2010 8:57:49 AM GMT -05:00 US/Canada Eastern
Subject: Re: [AVR-Chat] AVRISP -> AtTiny Communication Problem






On Sun, Jan 17, 2010 at 2:32 AM, Kenny M. < kenny782@yahoo.com > wrote: 

> 
> 
> If I don't connect reset to vcc ISP gives me the blinking orange light. 
> The same happens if I connect it to vcc with no resistor 
> 
> 
Not sure I quite understand that. 

Initially, you should hook up the chip to the isp signals. 

mosi-mosi 
miso-miso 
sclk-sclk 
reset-reset 
gnd-gnd 
vcc-vtg 

reset also goes to vcc via 10k resistor (not necessary for all avr device 
types but won't hurt) 
NO other circuitry should be connected to any of the signal lines (at least 
for now). 
provide proper power (vcc and ground). 

in avrstudio, 
set isp programming speed to lowest possible setting 
set correct device 
set low voltage isp mode 

If at this point you can't read the signature bytes, you've got: 
bad wiring 
bad chip 
bad power 
bad isp programmer 

time to break out the scope. 

-- 
carl 
-------------------------------------------------------- 
Henry Carl Ott N2RVQ hcarlott@gmail.com 

[Non-text portions of this message have been removed]

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.