ST72324BJ2 datasheet(131/188 Pages) STMICROELECTRONICS

131 / 188 page

ST72324B

Instruction set

131/188

Indirect (short)

The pointer address is a byte, the pointer size is a byte, thus allowing 00 - FF addressing

space, and requires 1 byte after the opcode.

Indirect (long)

The pointer address is a byte, the pointer size is a word, thus allowing 64 Kbyte addressing

space, and requires 1 byte after the opcode.

11.1.6

Indirect indexed (short, long)

This is a combination of indirect and short indexed addressing modes. The operand is

referenced by its memory address, which is defined by the unsigned addition of an index

the opcode.

The indirect indexed addressing mode consists of two submodes:

Indirect indexed (short)

The pointer address is a byte, the pointer size is a byte, thus allowing 00 - 1FE addressing

space, and requires 1 byte after the opcode.

Indirect indexed (long)

The pointer address is a byte, the pointer size is a word, thus allowing 64 Kbyte addressing

space, and requires 1 byte after the opcode.

Table 78.

Instructions supporting direct, indexed, indirect and indirect indexed

addressing modes

Instructions

Function

Long and short

Load

Compare

AND, OR, XOR

Logical operations

ADC, ADD, SUB, SBC

Arithmetic Additions/Subtractions operations

BCP

Bit Compare

Short only

CLR

Clear

INC, DEC

Increment/Decrement

TNZ

Test Negative or Zero

CPL, NEG

1 or 2 Complement

BSET, BRES

Bit operations

BTJT, BTJF

Bit Test and Jump operations

SLL, SRL, SRA, RLC, RRC

Shift and Rotate operations

SWAP

Swap nibbles

CALL, JP

Call or Jump sub-routine

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