EM78P458AP datasheet(52/76 Pages) EMC

52 / 76 page

EM78P458/459

OTP ROM

affected by the operation. The symbol "k" represents an 8 or 10-bit constant or literal value.

Table 16 The list of the instruction set of EM78P458/459

INSTRUCTION BINARY

HEX MNEMONIC

OPERATION

STATUS AFFECTED

0 0000 0000 0000

0000

NOP

No Operation

None

0 0000 0000 0001

0001

DAA

Decimal Adjust A

0 0000 0000 0010

0002

CONTW

→ CONT

None

0 0000 0000 0011

0003

SLEP

→ WDT, Stop oscillator

T,P

0 0000 0000 0100

0004

WDTC

→ WDT

T,P

0 0000 0000 rrrr

000r

IOW R

→ IOCR

None <Note1>

0 0000 0001 0000

0010

ENI

Enable Interrupt

None

0 0000 0001 0001

0011

DISI

Disable Interrupt

None

0 0000 0001 0010

0012

RET

[Top of Stack]

→ PC

None

0 0000 0001 0011

0013

RETI

[Top of Stack]

→ PC, Enable Interrupt

None

0 0000 0001 0100

0014

CONTR

CONT

→ A

None

0 0000 0001 rrrr

001r

IOR R

IOCR

→ A

None <Note1>

0 0000 01rr rrrr

00rr

MOV R,A

→ R

None

0 0000 1000 0000

0080

CLRA

→ A

0 0000 11rr rrrr

00rr

CLR R

→ R

0 0001 00rr rrrr

01rr

SUB A,R

R-A

→ A

Z,C,DC

0 0001 01rr rrrr

01rr

SUB R,A

R-A

→ R

Z,C,DC

0 0001 10rr rrrr

01rr

DECA R

R-1

→ A

0 0001 11rr rrrr

01rr

DEC R

R-1

→ R

0 0010 00rr rrrr

02rr

OR A,R

∨ VR → A

0 0010 01rr rrrr

02rr

OR R,A

∨ VR → R

0 0010 10rr rrrr

02rr

AND A,R

A & R

→ A

0 0010 11rr rrrr

02rr

AND R,A

A & R

→ R

0 0011 00rr rrrr

03rr

XOR A,R

⊕ R → A

0 0011 01rr rrrr

03rr

XOR R,A

⊕ R → R

0 0011 10rr rrrr

03rr

ADD A,R

A + R

→ A

Z,C,DC

0 0011 11rr rrrr

03rr

ADD R,A

A + R

→ R

Z,C,DC

0 0100 00rr rrrr

04rr

MOV A,R

→ A

0 0100 01rr rrrr

04rr

MOV R,R

→ R

0 0100 10rr rrrr

04rr

COMA R

→ A

0 0100 11rr rrrr

04rr

COM R

→ R

0 0101 00rr rrrr

05rr

INCA R

R+1

→ A

0 0101 01rr rrrr

05rr

INC R

R+1

→ R

0 0101 10rr rrrr

05rr

DJZA R

R-1

→ A, skip if zero

None

0 0101 11rr rrrr

05rr

DJZ R

R-1

→ R, skip if zero

None

0 0110 00rr rrrr

06rr

RRCA R

R(n)

→ A(n-1),

R(0)

→ C, C → A(7)

0 0110 01rr rrrr

06rr

RRC R

R(n)

→ R(n-1),

R(0)

→ C, C → R(7)

0 0110 10rr rrrr

06rr

RLCA R

R(n)

→ A(n+1),

R(7)

→ C, C → A(0)

0 0110 11rr rrrr

06rr

RLC R

R(n)

→ R(n+1),

R(7)

→ C, C → R(0)

0 0111 00rr rrrr

07rr

SWAPA R

R(0-3)

→ A(4-7),

R(4-7)

→ A(0-3)

None

0 0111 01rr rrrr

07rr

SWAP R

R(0-3)

↔ R(4-7)

None

0 0111 10rr rrrr

07rr

JZA R

R+1

→ A, skip if zero

None

0 0111 11rr rrrr

07rr

JZ R

R+1

→ R, skip if zero

None

0 100b bbrr rrrr

0xxx

BC R,b

→ R(b)

None <Note2>

This specification is subject to change without prior notice.

06.25.2004 (V1.4)

EM78P458AP Datasheet(PDF) 52 Page - ELAN Microelectronics Corp

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