User's Manual

DESCRIPTION OF INSTRUCTIONS

347

88. RET (Return from subroutine, non interrupt)

00100010

Instruction code

Operations

Number of bytes

Number of cycles

Flags

(PSW)

Description

: Byte 1

(PC

8~15)←((SP))

(SP)←(SP)–1

(PC

0~7)←((SP))

(SP)←(SP)–1

C AC F0 RS1 RS0 OV F1 P

The stack contents addressed by the stack pointer are popped

in the upper order 8 thru 15 of the program counter, and the

stack pointer is decremented by 1. Then the stack contents

addressed by the updated stack pointer are popped in the lower

order 0 thru 7 of the program counter, again decrementing the

stack pointer by 1. The program counter is updated with the

stack contents, and control is shifted to the address after

updating.