ST7MC1K2-Auto datasheet(303/371 Pages) STMICROELECTRONICS

303 / 371 page

Obsolete

Product(s)

- Obsolete

Product(s)

ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto

Instruction set

303/371

Instruction set

11.1

CPU addressing modes

The CPU features 17 different addressing modes which can be classified in 7 main groups:

The CPU instruction set is designed to minimize the number of bytes required per instruction: To do so,

most of the addressing modes may be subdivided in two sub-modes 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 177.

CPU addressing mode groups

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

Table 178.

CPU addressing mode overview

Mode

Syntax

Destination

Pointer address

(Hex.)

Pointer size

(Hex.)

Length

(bytes)

Inherent

nop

+ 0

Immediate

ld A,#$55

+ 1

Short

Direct

ld A,$10

00..FF

+ 1

Long

Direct

ld A,$1000

0000..FFFF

+ 2

No Offset

Direct

Indexed ld A,(X)

00..FF

+ 0

Short

Direct

Indexed ld A,($10,X)

00..1FE

+ 1

Long

Direct

Indexed ld A,($1000,X)

0000..FFFF

+ 2

Short

Indirect

ld A,[$10]

00..FF

byte

+ 2

Long

Indirect

ld A,[$10.w]

0000..FFFF

00..FF

word

+ 2

Short

Indirect Indexed ld A,([$10],X)

00..1FE

00..FF

byte

+ 2

Long

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

0000..FFFF

00..FF

word

+ 2

Relative

Direct

jrne loop

PC+/-127

+ 1

Obsolete

Product(s)

- Obsolete

Product(s)

ST7MC1K2-Auto bảng dữ liệu(PDF) 303 Page - STMicroelectronics

ST7MC1K2-Auto bảng dữ liệu(HTML) 303 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL