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Re: [avr-gcc-list] avrdude, ATMega128

From: Brian Dean
Subject: Re: [avr-gcc-list] avrdude, ATMega128
Date: Sun, 5 Jun 2005 09:53:14 -0400
User-agent: Mutt/

On Sun, Jun 05, 2005 at 02:45:28PM +0200, Torsten Mohr wrote:

> Any way, i wonder now why i can erase and reprogram the device even
> with PEN left open.  According to the data sheet there is an
> internal pull-up and PEN needs to be pulled low during reset.

/PEN can be used as an alternative for using the /RESET signal for
entering programming mode but it can also be ignored.  Leaving /PEN
open is fine unless one actually wants to use it to enter programming
mode, but again, it is entirely optional.

Brian Dean
BDMICRO - ATmega128 Based MAVRIC Controllers

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