ST72E632K2B0 查看數據表（PDF） - STMicroelectronics

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ST72E632K2B0

LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C

STMicroelectronics 

ST7263

6 INSTRUCTION SET

6.1 ST7 ADDRESSING MODES

The ST7 Core features 17 different addressing

modes which can be classified in 7 main groups:

Addressing Mode

Inherent

Immediate

Direct

Indexed

Indirect

Relative

Bit operation

Example

nop

ld A,#$55

ld A,$55

ld A,($55,X)

ld A,([$55],X)

jrne loop

bset byte,#5

The ST7 Instruction set is designed to minimize

the number of bytes required per instruction: To do

Table 22. ST7 Addressing Mode Overview

so, most of the addressing modes may be subdi-

vided in two sub-modes called long and short:

– Long addressing mode is more powerful be-

cause it can use the full 64 Kbyte address space,

however it uses more bytes and more CPU cy-

cles.

– 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 in-

structions 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.

Inherent

Immediate

Short

Long

No Offset

Short

Long

Short

Long

Short

Long

Relative

Relative

Bit

Bit

Bit

Bit

Mode

Direct

Direct

Direct

Direct

Direct

Indirect

Indirect

Indirect

Indirect

Direct

Indirect

Direct

Indirect

Direct

Indirect

Indexed

Indexed

Indexed

Indexed

Indexed

Relative

Relative

Syntax

Destination/

Source

nop

ld A,#$55

ld A,$10

ld A,$1000

00..FF

0000..FFFF

ld A,(X)

00..FF

ld A,($10,X)

00..1FE

ld A,($1000,X) 0000..FFFF

ld A,[$10]

00..FF

ld A,[$10.w]

0000..FFFF

ld A,([$10],X) 00..1FE

ld A,([$10.w],X)

jrne loop

jrne [$10]

0000..FFFF

PC-128/PC+1271)

PC-128/PC+1271)

bset $10,#7

00..FF

bset [$10],#7 00..FF

btjt $10,#7,skip 00..FF

btjt [$10],#7,skip 00..FF

Pointer

Address

(Hex.)

00..FF

00..FF

00..FF

00..FF

00..FF

00..FF

00..FF

Pointer

Size

(Hex.)

byte

word

byte

word

byte

byte

byte

Length

(Bytes)

+0

+1

+1

+2

+ 0 (with X register)

+ 1 (with Y register)

+1

+2

+2

+2

+2

+2

+1

+2

+1

+2

+2

+3

Note 1. At the time the instruction is executed, the Program Counter (PC) points to the instruction follow-

ing JRxx.

87/109

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