Yahoo Groups archive

AVR-Chat

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

Message

Re: [AVR-Chat] ATtiny13 - re-using SPI pins?

2007-11-01 by Jim Wagner

It  should also be a circuit that does not care about the
signals during programming.

If it is an SPI peripheral, make sure the Select line is
pulled high with an external resistor because all the other
processor pins are tri-stated with no internal pullup while
ISP is running.

Jim


On Fri, 02 Nov 2007 06:32:39 +1100
 John Samperi <samperi@ampertronics.com.au> wrote:
> At 05:45 AM 2/11/2007, you wrote:
> >What can you
> >"hang off" of the SPI lines to allow the chip to be
> programmed
> 
> Pretty much anything above 1K, but make it as high as
> possible.
> 
> 
> Regards
> 
> John Samperi
> 
> ********************************************************
> Ampertronics Pty. Ltd.
> 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA
> Tel. (02) 9674-6495       Fax (02) 9674-8745
> Email: john@ampertronics.com.au
> Website  http://www.ampertronics.com.au
> *Electronic Design * Custom Products * Contract Assembly
> ********************************************************
> 

---------------------------------------------------------------
The Think Different Store
http://www.thinkdifferentstore.com/
For All Your Mac Gear
---------------------------------------------------------------

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.