ST72344K2 datasheet(191/247 Pages) STMICROELECTRONICS

191 / 247 page

ST72344xx, ST2345xx

Instruction set

Doc ID 12321 Rev 6

191/247

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

byte

+ 3

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

Table 76.

ST7 addressing mode overview (continued)

Mode

Syntax

Destination/

source

Pointer

address

Pointer

size (hex.)

Length

(bytes)

Table 77.

Inherent instructions

Inherent instruction

Function

NOP

No operation

TRAP

S/W Interrupt

WFI

Wait for interrupt (low-power mode)

HALT

Halt oscillator (lowest power mode)

RET

Subroutine return

IRET

Interrupt subroutine return

SIM

Set interrupt mask

RIM

Reset interrupt mask

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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