AVR-Chat

--- In AVR-Chat@yahoogroups.com, "bytheriverkwai" <rll_groups@...> 
wrote:
> How does the AVR do this internally - is the mcu is executing it's 
> own form of "CLI"? Or is it just turning off the Enable flags for 
> INT0 and INT1?

The AVR operates as described in the respective datasheet.  For 
example, for the mega32 it says on page 12:

"When an interrupt occurs, the Global Interrupt Enable I-bit is 
cleared and all interrupts are disabled."

The datasheet goes on to describe how you can re-enable interrupts 
to implement nested interrupts if desired.

The datasheets are chock full of such useful information.

Don Kinzer
ZBasic Microcontrollers
http://www.zbasic.net