ST72344K2 datasheet(194/247 Pages) STMICROELECTRONICS

194 / 247 page

Instruction set

ST72344xx, ST2345xx

194/247

Doc ID 12321 Rev 6

12.1.7

Relative Mode (direct, indirect)

This addressing mode is used to modify the PC register value by adding an 8-bit signed

offset to it.

The relative addressing mode consists of two submodes:

Relative (Direct)

The offset follows the opcode.

Relative (Indirect)

The offset is defined in memory, of which the address follows the opcode.

Table 79.

Instructions supporting direct, indexed, indirect and indirect indexed

addressing modes

Long and short instructions

Function

Load

Compare

AND, OR, XOR

Logical Operations

ADC, ADD, SUB, SBC

Arithmetic Addition/subtraction operations

BCP

Bit Compare

Table 80.

Short instructions

Short instructions only

Function

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 subroutine

Table 81.

Relative direct/indirect instructions

Available relative direct/indirect instructions

Function

JRxx

Conditional Jump

CALLR

Call Relative

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