ST7LITE20F2 datasheet(111/166 Pages) STMICROELECTRONICS

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ST7LITE20F2 ST7LITE25F2 ST7LITE29F2

Instruction set

Doc ID 8349 Rev 5

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12.1.1

Inherent

All Inherent instructions consist of a single byte. The opcode fully specifies all the required

information for the CPU to process the operation.

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-128/

PC+127(1)

−−

+ 1

Relative

Indirect

−

jrne [$10]

PC-128/

PC+127(1)

00..FF

byte

+ 2

Bit

Direct

−

bset $10,#7

00..FF

−−

+ 1

Bit

Indirect

−

bset [$10],#7

00..FF

byte

+ 2

Bit

Direct

Relative btjt $10,#7,skip

00..FF

−−

+ 2

Bit

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

00..FF

byte

+ 3

At the time the instruction is executed, the Program Counter (PC) points to the instruction following JRxx.

Table 49.

ST7 addressing mode overview (continued)

Table 50.

Inherent instructions

Instruction

Function

NOP

No Operation

TRAP

S/W Interrupt

WFI

WAIT for Interrupt (low power mode)

HALT

HALT oscillator (lowest power mode)

RET

Sub-routine Return

IRET

Interrupt sub-routine Return

SIM

Set Interrupt Mask (level 3)

RIM

Reset Interrupt Mask (level 0)

SCF

Set Carry Flag

RCF

Reset Carry Flag

RSP

Reset Stack Pointer

Load

CLR

Clear

PUSH/POP

Push/Pop to/from the stack

INC/DEC

Increment/Decrement

TNZ

Test Negative or Zero

CPL, NEG

1 or 2 Complement

MUL

Byte Multiplication

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