This signalizes that an instruction that uses the ALU wants to update the arithmetic flags.
Flags I (general interrupt enable, SREG(7)) and T (transfer bit, SREG(6)) are left unchanged.
This sets the I flag.
Only RETI instruction needs this.
This clears the I flag.
No instruction explicitely requests this.
This is only requested when an interrupt is acknowledged (during the consequent implicit CALL).
Generated on Tue Dec 31 20:26:30 2002 for Pipelined AVR microcontroller by
@Importing into repository the new directory structure.