Zilog Z16F2810 User Manual
Page 118
EI Instruction
UM018809-0611
102
ZNEO
®
CPU Core
User Manual
EI
Definition
Enable Interrupts
Syntax
EI
Operation
FLAGS[0]
1
Description
The Master Interrupt Enable (
IRQE
) bit of the Flags register is set to 1. This allows the ZNEO
CPU to respond to interrupt requests.
Flags
Syntax and Opcodes
Example
Before:
IRQE=0 (Vectored interrupt requests are globally disabled.)
EI
;Object code: FFFA
After:
IRQE=1 (Interrupt requests are enabled or disabled by their individual control registers.)
7
6
5
4
3
2
1
0
C
Z
S
V
B
CIRQE IRQE
–
–
–
–
–
–
–
1
Legend
C
= No change.
Z
= No change.
S
= No change.
V
= No change.
B
= No change.
CIRQE
= No change.
IRQE
= Set to 1.
Instruction, Operands
Word 0
Word 1
Word 2
EI
FFFAH