Datasheet

www.ti.com

Instruction Set

3.4.6.34 POP

*POP[.W] Pop word from stack to destination

*POP.B Pop byte from stack to destination

Syntax POP dst

POP.B dst

Operation @SP → temp

SP + 2 → SP

temp → dst

Emulation MOV @SP+,dst or MOV.W @SP+,dst

MOV.B @SP+,dst

Description The stack location pointed to by the stack pointer (TOS) is moved to the destination. The

stack pointer is incremented by two afterwards.

Status Bits Status bits are not affected.

Example The contents of R7 and the status register are restored from the stack.

POP R7 ; Restore R7

POP SR ; Restore status register

Example The contents of RAM byte LEO is restored from the stack.

POP.B LEO ; The low byte of the stack is moved to LEO.

Example The contents of R7 is restored from the stack.

POP.B R7 ; The low byte of the stack is moved to R7,

; the high byte of R7 is 00h

Example The contents of the memory pointed to by R7 and the status register are restored from

the stack.

POP.B 0(R7) ; The low byte of the stack is moved to the

; the byte which is pointed to by R7

; Example: R7 = 203h

; Mem(R7) = low byte of system stack

; Example: R7 = 20Ah

; Mem(R7) = low byte of system stack

POP SR ; Last word on stack moved to the SR

NOTE: The System Stack Pointer

The system stack pinter (SP) is always incremented by two, independent

of the byte suffix.

SLAU144J–December 2004–Revised July 2013 CPU

Submit Documentation Feedback