S3C9442 datasheet(24/50 Pages) SAMSUNG

Part #	S3C9442

Description	SAM88RCRI INSTRUCTION SET

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Manufacturer	SAMSUNG [Samsung semiconductor]

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SAM88RCRI INSTRUCTION SET

S3C9442/C9444/F9444/C9452/C9454/F9454

6-24

IRET — Interrupt Return

IRET

Operation:

FLAGS

← @SP

SP

← SP + 1

PC

← @SP

SP

← SP + 2

SYM(2)

← 1

This instruction is used at the end of an interrupt service routine. It restores the flag register and

the program counter. It also re-enables global interrupts.

Flags: All flags are restored to their original settings (that is, the settings before the interrupt occurred).

Format:

IRET

(Normal)

Bytes

Cycles

Opcode

(Hex)

opc

1

10

BF

12

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