ST7LUS5 datasheet(81/124 Pages) STMICROELECTRONICS

部品番号	ST7LUS5

部品情報	8-bit low cost, low pin-count MCU for automotive,with single voltage Flash memory, ADC, timers

PDF	124 Pages

Scroll/Zoom	100%

メーカー	STMICROELECTRONICS [STMicroelectronics]

ホームページ	http://www.st.com

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ST7LUS5, ST7LU05, ST7LU09

Instruction set

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Instruction set

11.1

ST7 addressing modes

The ST7 core features 17 different addressing modes which can be classified in seven main

groups:

The ST7 Instruction set is designed to minimize the number of bytes required per

instruction: To do so, most of the addressing modes may be divided in two submodes called

long and short:

●

Long addressing mode is more powerful because it can use the full 64 Kbyte address

space, however it uses more bytes and more CPU cycles.

●

Short addressing mode is less powerful because it can generally only access page

zero (0000h - 00FFh range), but the instruction size is more compact, and faster. All

memory to memory instructions use short addressing modes only (CLR, CPL, NEG,

BSET, BRES, BTJT, BTJF, INC, DEC, RLC, RRC, SLL, SRL, SRA, SWAP)

The ST7 Assembler optimizes the use of long and short addressing modes.

Table 53.

Addressing modes

Addressing mode

Example

Inherent

nop

Immediate

ld A,#$55

Direct

ld A,$55

Indexed

ld A,($55,X)

Indirect

ld A,([$55],X)

Relative

jrne loop

Bit operation

bset

byte,#5

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