PM0044 datasheet(45/162 Pages) STMICROELECTRONICS

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PM0044

STM8 addressing modes

Doc ID 13590 Rev 3

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6.5

Indirect (Short Pointer Long, Long Pointer Long)

The data byte required for the operation is found by its memory address, located in memory

(pointer).

The pointer address follows the op-code. The indirect addressing mode is made of three

sub-modes:

Table 28.

Overview of Indirect addressing instructions

Addressing mode

Syntax

EA formula

Ptr Adr

Ptr

Size

Dest adr

Short Pointer Long Indirect

((shortptr.w))

00..FF

Word

0000..FFFF

Long Pointer Long

Indirect

((longptr.w))

0000..FFFF Word

0000..FFFF

Table 29.

Available Long Pointer Long and Short Pointer Long Indirect Instructions

Instructions

Functions

LD, LDW

Load

Compare

AND, OR, XOR

Logical Operations

ADC, ADD, SUB, SBC

Arithmetic Addition/Subtraction operations

BCP

Bit Compare

CALL, JP

Call or Jump subroutine

Table 30.

Available Long Pointer Long Indirect Instructions

Instructions

Functions

CLR

Clear

TNZ

Test Negative or Zero

CPL, NEG

1’s or 2’s Complement

SLA, SLL, SRL, SRA, RLC, RRC

Shift and Rotate Operations

SWAP

Swap Nibbles

INC, DEC

Increment/Decrement

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