ST7PSCR1E4M1/XXX 查看數據表（PDF） - STMicroelectronics

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ST7PSCR1E4M1/XXX

8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

STMicroelectronics 

ST7SCR

INSTRUCTION SET OVERVIEW (Cont’d)

13.1.6 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 un-

signed addition of an index register value (X or Y)

with a pointer value located in memory. The point-

er address follows the opcode.

The indirect indexed addressing mode consists of

two sub-modes:

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 22. Instructions Supporting Direct,

Indexed, Indirect and Indirect Indexed

Addressing Modes

Long and Short

Instructions

LD

CP

AND, OR, XOR

ADC, ADD, SUB, SBC

BCP

Function

Load

Compare

Logical Operations

Arithmetic Additions/Sub-

stractions operations

Bit Compare

13.1.7 Relative mode (Direct, Indirect)

This addressing mode is used to modify the PC

register value, by adding an 8-bit signed offset to

it.

Available Relative

Direct/Indirect

Instructions

JRxx

CALLR

Function

Conditional Jump

Call Relative

The relative addressing mode consists of two sub-

modes:

Relative (Direct)

The offset is following the opcode.

Relative (Indirect)

The offset is defined in memory, which address

follows the opcode.

Short Instructions

Only

CLR

INC, DEC

TNZ

CPL, NEG

BSET, BRES

BTJT, BTJF

SLL, SRL, SRA, RLC,

RRC

SWAP

CALL, JP

Function

Clear

Increment/Decrement

Test Negative or Zero

1 or 2 Complement

Bit Operations

Bit Test and Jump Opera-

tions

Shift and Rotate Opera-

tions

Swap Nibbles

Call or Jump subroutine

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