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[avr-libc-dev] <avr/wdt.h> documented
From: |
Joerg Wunsch |
Subject: |
[avr-libc-dev] <avr/wdt.h> documented |
Date: |
Mon, 16 Dec 2002 00:26:46 +0100 |
User-agent: |
Mutt/1.2.5i |
...Just in case somebody wants to review that.
I also invented symbolic constants for the watchdog timeouts,
describing the approximate expiry time @ Vcc = 5.0 V. The differences
between the devices are neglicible since it was apparently a design
goal that the oscillator controlling the watchdog timer runs at 1 MHz
@ 5 V. Thus it makes some sense to have symbolic constants.
The timer will run slower at lower voltage, and that's where
the differences become huge: for all older devices (by design), the
timeout will increase by a factor of ~ 3 when going down to Vcc = 3 V,
while the ATmega128 and ATmega8 experience only little slowdown.
--
J"org Wunsch Unix support engineer
address@hidden http://www.interface-systems.de/~j/
- [avr-libc-dev] <avr/wdt.h> documented,
Joerg Wunsch <=