11

* 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

ACCUMULATOR

ACCUMULATOR

ACCUMULATOR

ACCUMULATOR

ACCUMULATOR

Accumulator is a 4-bit data register for temporary data. For the arithematic, logic and comparative opertion

.., ACC plays a role which holds the source data and result.

FLAGS

FLAGS

FLAGS

FLAGS

FLAGS

There are four kinds of flag, CF ( Carry flag ), ZF ( Zero flag ), SF ( Status flag ) and GF ( General flag ),

these 4 1-bit flags are affected by the arithematic, logic and comparative .... operation.

All flags will be put into stack when an interrupt subroutine is served, and the flags will be restored after

RTI instruction executed.

TRGB

TRGB

TRGB

TRGB

TRGB (Time B overflow interrupt)

PC 000000001000

(for 4K ROM)

PC 000000000100

0

(for 8K ROM)

TBI

TBI

TBI

TBI

TBI (Time base interrupt)

PC 000000001010

(for 4K ROM)

PC 000000000101

0

(for 8K ROM)

INT1

INT1

INT1

INT1

INT1 (External interrupt from P8.0)

PC 000000001100

(for 4K ROM)

PC 000000000110

0

(for 8K ROM)

(4) Reset operation:

(4) Reset operation:

(4) Reset operation:

(4) Reset operation:

(4) Reset operation:

PC 000000000000

(for 4K ROM)

PC 000000000000

0

(for 8K ROM)

(5) Other operations:

(5) Other operations:

(5) Other operations:

(5) Other operations:

(5) Other operations:

For 1-byte instruction execution: PC + 1

For 2-byte instruction execution: PC + 2