
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.)
76543210
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
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