Atmel Evaluation Kit for the SAM4E Series of Flash Microcontrollers ATSAM4E-EK ATSAM4E-EK Data Sheet

213

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

Condition Flags

This instruction does not change the condition flags.

Examples

CPSID i

; Disable interrupts and configurable fault handlers (set PRIMASK)

CPSID f

; Disable interrupts and all fault handlers (set FAULTMASK)

CPSIE i

; Enable interrupts and configurable fault handlers (clear PRIMASK)

CPSIE f

; Enable interrupts and fault handlers (clear FAULTMASK)

Data Memory Barrier.

Syntax

DMB{cond}

where:

cond

is an optional condition code, see 

.

Operation

DMB acts as a data memory barrier. It ensures that all explicit memory accesses that appear, in program order,
before the DMB instruction are completed before any explicit memory accesses that appear, in program order,
after the DMB instruction. DMB does not affect the ordering or execution of instructions that do not access
memory.

Condition Flags

This instruction does not change the flags.

Examples

DMB

; Data Memory Barrier