Texas Instruments MSP430x1xx User Manual

Page 378

Instruction Set Overview

B-28

* DINT

Disable (general) interrupts

Syntax

DINT

Operation

→

GIE

or
(0FFF7h .AND. SR

→

.NOT.src .AND. dst –> dst)

Emulation

BIC

#8,SR

Description

All interrupts are disabled.
The constant 08h is inverted and logically ANDed with the status register (SR).
The result is placed into the SR.

Status Bits

N: Not

affected

Z: Not affected
C: Not affected
V: Not affected

Mode Bits

GIE is reset. OscOff and CPUOff are not affected.

Example

The general interrupt enable (GIE) bit in the status register is cleared to allow
a nondisrupted move of a 32-bit counter. This ensures that the counter is not
modified during the move by any interrupt.

DINT

; All interrupt events using the GIE bit are disabled

NOP
MOV

COUNTHI,R5

; Copy counter

MOV

COUNTLO,R6

EINT

; All interrupt events using the GIE bit are enabled

Note:

Disable Interrupt

If any code sequence needs to be protected from interruption, the DINT
should be executed at least one instruction before the beginning of the
uninterruptible sequence, or should be followed by an NOP.