On Jan 6, 2011, at 18:20:06, David A. Lyons wrote: > On Jan 6, 2011, at 5:49 PM, Rick Mann wrote: >>> Besides defaulting to 8MHz, the factory default 'divide by 8' is set, so >>> unless you set the fuses, the part is running at 1MHz. >> >> I think the docs say it's cleared by default. Anyway, I tried both. So, I'm >> very puzzled that Fosc seems to be 1 MHz. > > In <http://www.atmel.com:80/dyn/resources/prod_documents/doc8272.pdf>, I see > section 8.2.1, "Default Clock Source" saying: > > "The device is shipped with internal RC oscillator at 8.0MHz and with > the fuse CKDIV8 programmed, resulting in 1.0MHz system clock." > > To avoid being misled by fuse documentation elsewhere in the docs, always > remember that a "programmed" fuse is 0, and an "unprogrammed" fuse is 1.
Yep, I'm quite familiar with "programmed" meaning 0. But that is not the same as saying that "programmed/0" means "this feature enabled." Does it? I'm never sure. A "1" usually means a feature is enabled (otherwise things are active-low, and have a bar over them ;-) ). -- Rick _______________________________________________ AVR-chat mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/avr-chat
