ST7DALIF2 datasheet(123/171 Pages) STMICROELECTRONICS

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ST7DALIF2

Instruction set

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19.1.7

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 the memory, the address of which follows the opcode.

19.2

Instruction groups

The ST7 family devices use an Instruction Set consisting of 63 instructions. The instructions

may be subdivided into 13 main groups as illustrated in the following table:

Table 59.

Relative direct and indirect instructions and functions

Available relative direct/indirect instructions

Function

JRxx

Conditional Jump

CALLR

Call Relative

Table 60.

Instruction groups

Group

Instructions

Load and Transfer

CLR

Stack operation

PUSH

POP

RSP

Increment/Decrement

INC

DEC

Compare and Tests

TNZ

BCP

Logical operations

AND

XOR

CPL

NEG

Bit operation

BSET

BRES

Conditional Bit Test and Branch

BTJT

BTJF

Arithmetic operations

ADC

ADD

SUB

SBC

MUL

Shift and Rotates

SLL

SRL

SRA

RLC

RRC

SWAP

SLA

Unconditional Jump or Call

JRA

JRT

JRF

CALL

CALLR

NOP

RET

Conditional Branch

JRxx

Interruption management

TRAP

WFI

HALT

IRET

Condition Code Flag modification

SIM

RIM

SCF

RCF

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