22

* This specification are subject to be changed without notice.

EM73P982

EM73P982

EM73P982

EM73P982

EM73P982

4-BIT MICROCONTROLLER

4-BIT MICROCONTROLLER

4-BIT MICROCONTROLLER

4-BIT MICROCONTROLLER

4-BIT MICROCONTROLLER

12.25.2001

Read automatically the display data from the display data area and send to the LCD driver by the hardware.

Therefore, the display patterns can be changed only by overwritting the contents of the display data area

with the software.

The data memory which is not used to store the LCD display data and the addresses are not connected to the

LCD can be used to store the ordinary user's processing data.

PROGRAM EXAMPLE:

LDIA #1100B

; LCD display enable

OUTA P27

LDIA #1010B

STA 24H

(3) LCD waveform :

(3) LCD waveform :

(3) LCD waveform :

(3) LCD waveform :

(3) LCD waveform :

: ON

: OFF

COM0

COM0

COM1

COM7

SEG0

SEG0-COM0

VDD

V4

V3

V2

V1

VSS

COM0

VDD

V4

V3

V2

V1

VSS

COM1

SEG0

ON

COM0

COM1

SEG0

SEG0-COM0

VDD

V3

V2

V1

VSS

COM0

VDD

V3

V2

V1

VSS

COM1

COM1

ON

SEG0-COM0

OFF

SEG0-COM0

ON

SEG0-COM1

ON

SEG0-COM0

ON

SEG0-COM1

OFF

SEG0-COM1

OFF

Frame freq.=65Hz

Frame freq.=65Hz

Frame freq.

=65Hz

Frame freq.

=65Hz

* TYPE A, 1/4 bias :

* TYPE B, 1/4 bias :

* TYPE A, modify 1/4 bias :

* TYPE B, modify 1/4 bias :

BIAS

VDD

V4

V3

V2

V1

VSS

Modify 1/4

1

17/23

12/23

11/23

6/23

0

1/4

1

3/4

1/2

1/4

0

S

E

G

0