10

* This specification are subject to be changed without notice.

EM73P461A

EM73P461A

EM73P461A

EM73P461A

EM73P461A

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

12.27.2001

Preliminary

Preliminary

Preliminary

Preliminary

Preliminary

(2) Subroutine instruction:

(2) Subroutine instruction:

(2) Subroutine instruction:

(2) Subroutine instruction:

(2) Subroutine instruction:

SCALL a

SCALL a

SCALL a

SCALL a

SCALL a

Object code: 1110 nnnn

Condition : PC

← a ; a=8n+6 ; n=1..15 ; a=86h, n=0

PC 0000

aaaaaaaa

LCALL a

LCALL a

LCALL a

LCALL a

LCALL a

Object code: 0100 0 aaa aaaa aaaa

Condition: PC

← a

PC 0

aaaaaaaaaaa

RET

RET

RET

RET

RET

Object code: 0100 1111

Condition: PC

← STACK[SP]; SP + 1

PC

The return address stored in stack

(for 4K ROM)

PC

The return address stored in stack

(for 8K ROM)

RT I

RT I

RT I

RT I

RT I

Object code: 0100 1101

Condition : FLAG. PC

← STACK[SP]; EI ← 1; SP + 1

PC

The return address stored in stack

(for 4K ROM)

PC

The return address stored in stack

(for 8K ROM)

(3) Interrupt acceptance operation:

(3) Interrupt acceptance operation:

(3) Interrupt acceptance operation:

(3) Interrupt acceptance operation:

(3) Interrupt acceptance operation:

When an interrupt is accepted, the original PC is pushed into stack and interrupt vector will be loaded into

PC,The interrupt vectors are as following:

INT0

INT0

INT0

INT0

INT0 (External interrupt from P8.2)

PC 000000000010

(for 4K ROM)

PC 000000000001

0

(for 8K ROM)

TRGA

TRGA

TRGA

TRGA

TRGA (Timer A overflow interrupt)

PC 000000000110

(for 4K ROM)

PC 000000000011

0

(for 8K ROM)