S3C1840 View Datasheet(PDF) - Samsung

Part Name

Description

Manufacturer

S3C1840

4-bit single-chip CMOS microcontroller

Samsung 

INSTRUCTION SET

S3C1840/C1850/C1860/P1860

PAGE #n

Binary Code:

Description:

Operation:

Flags:

Example:

0001 dddd

The immediate 4-bit value specified by n (data) is loaded into the PB register.

(PB) ← #n

SF : Set to one

SL : Unaffected

PAGE #3H

; Move 3H to page buffer

JP

AN

; Jump to label AN located at page 3 if SF is one;

otherwise, it is skipped

CPNE @HL,A

Binary Code:

Description:

Operation:

Flags:

Example:

0000 0000

The contents of accumulator are compared to the contents of indirect data memory; an

appropriate flag is set if their values are not equal.

The contents of both operands are unaffected by the comparison.

M [(H,L)] ≠ (A)

SF : Set if not equal, cleared otherwise

SL : Unaffected

CLR

A

ADDS A,#3H

MOV

H,#0H

MOV

L,#6H

CPNE @HL,A

; Acc value 3H is compared to contents of RAM address 06H

JP

OA

; Jump to OA if values of RAM address 06H are not 3h

JP

OB

; Jump to OB if values of RAM address 06H are 3H

5-8

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