Zilog Z8F0130 - Manual (Page 168)

eZ8
™
CPU Core
User Manual
UM012820-0810 IRET Instruction
153
IRET
Definition
Interrupt Return.
Syntax
IRET
Operation
FLAGS
 @SP
SP
 SP + 1
PC
 @SP
SP
 SP + 2
IRQCTL[7]
 1
Description
This instruction is issued at the end of an interrupt service routine. Execu-
tion of IRET restores the Flags Register and the Program Counter. The
Interrupt Controller is enabled by setting Bit 7 of the Interrupt Control
Register to 1.
Flags
C Restored to original setting before the interrupt occurred
Z Restored to original setting before the interrupt occurred
S Restored to original setting before the interrupt occurred
V Restored to original setting before the interrupt occurred
D Restored to original setting before the interrupt occurred
H Restored to original setting before the interrupt occurred