¡ Semiconductor

MSM9004-01/02

11/15

FUNCTIONAL DESCRIPTION

Display Data Input

D48 D47 D46 D45

D2

D49

D1

0

0

0

C1

C2

C3

C4

LCD display bit

(49 bits)

Dummy bit

(3 bits)

Select bit

(4 bits)

CLOCK2

DATA

LOAD

Note:

Always set a logic "0" to the dummy bit.

LCD Display Bit - LCD Panel Lighting Status Correspondence Table

LCD display bit

(D1 to D49)

LCD panel lighting

status

1ON

0

OFF

LCD Display Bit - Segment Output Correspondence Table

D49

SEG49

D48

SEG48

D47

SEG47

D46

SEG46

D45

SEG45

D2

SEG2

D1

SEG1

LCD display bit

Segment output

Select Bit - Data Latch Correspondence Table

0001

C4

C3

C2

C1

0010

0100

1000

Display data writing

data latch

Corresponding

common output

Data latch 1

Data latch 2

Data latch 3

Data latch 4

COM1

COM2

COM3

COM4

The select bits C1 to C4 select Data latch 1 to Data latch 4 corresponding to COM 1 to COM 4

independently. If logic "1s" are selected to multiple select bits, the LCD display bits are written

to all corresponding data latches.

Example:

When logic "1s" are set to all select bits C1 to C4, and logic "0s" are set to all LCD display bits D1

to D49, logic "0s" are written to Data latch 1 to Data latch 4 by one data input. This leads to turning

off the entire LCD panel.