hsabaghianb @ kashanu.ac.ir Microprocessors 1-44
Z80 Pin Description
Interrupt Request (input, active Low).
Interrupt Request is generated by I/O devices.
Checked at the end of the current instruction
If flip-flop (IFF) is enabled.
(Input, negative edge-triggered).
Higher priority than INT.
Recognized at the end of the current Instruction
Independent of the status of IFF
Forces the CPU to restart at location 0066H.