23

* This specification are subject to be changed without notice.

EM73C63

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

Preliminary

8.11.2000

(3) LCD waveform : (1/5 bias)

Although there are two LCD waveform types, but for the reason of the number of voltage transition point in type

A is greater than type B, So type B gets a better display performance.

: ON

: OFF

COM0

COM0

COM1

COM7

SEG0

SEG0-COM0

V5

V4

V3

V2

V1

Vss

COM0

V5

V4

V3

V2

V1

Vss

COM1

SEG0

ON

SEG0-COM0

ON

SEG0-COM1

OFF

SEG0-COM1

OFF

Frame freq.=64Hz

Frame freq.

=64Hz

* TYPE A :

* TYPE B :

S

E

G

0

(4) LCD bias resistor :

There are high and low resistance choices for LCD bias resistor. To choose low bias resistor will take more power

but get a better display performance.

(5) LCD bias supply :

The LCD bias voltage can be supplied by VDD or voltage multiplier, when the operating voltage of LCD panel

and VDD are the same, the LCD bias voltage pin (V5) connects to VDD directly.

VSS

VA

VB

VEE

V5

V4

V3

V2

V1