No. 6235-6/14

LC75844M

2. When CL is stopped at the high level

Note: DD ... Direction data

• CCB address...............44H

• D1 to D88...................Display data

• P0 to P2 ......................Segment output port/general-purpose output port switching control data

• DR ..............................1/2 bias drive or 1/3 bias drive switching control data

• SC...............................Segments on/off control data

• BU ..............................Normal mode/power-saving mode control data

CE

CL

DI

A12601

0010001

0

B0 B1 B2 B3 A0 A1 A2

A3

D2

D1

D3

D37 D38 D39 D40 D41 D42 D43 D44 00000

P0 P1 P2 DR SC BU

0

0010001

0

B0 B1 B2 B3 A0 A1 A2

A3

D46

D45

D47

D81 D82 D83 D84 D85 D86 D87 D88 000000000001

CCB address

8 bits

CCB address

8 bits

Display data

44 bits

Display data

44 bits

Control data

11 bits

Fixed data

11 bits

DD

1 bit

DD

1 bit

Serial Data Transfer Examples

• When 45 or more segments are used, all 112 bits of the serial data must be sent.

• When fewer than 45 segments are used, only 56 bits of serial data need to be sent. However, the display data D1 to D44

and the control data must be sent.

A12602

00100010

B0 B1 B2 B3 A0 A1 A2 A3

D1 D2 D3

D37 D38 D39 D40 D41 D42 D43 D44

00000

P0 P1 P2 DR SC BU

0

00100010

B0 B1 B2 B3 A0 A1 A2 A3

D45 D46 D47

D81 D82 D83 D84 D85 D86 D87 D88

000000000001

A12603

00100010

B0 B1 B2 B3 A0 A1 A2 A3

D1 D2 D3

D37 D38 D39 D40 D41 D42 D43 D44

00000

P0 P1 P2 DR SC BU

0

Note: When fewer than 45 segments are used, transfers such as that shown in the figure below cannot be used.

A12604

00100010

B0 B1 B2 B3 A0 A1 A2 A3

D45 D46 D47

D81 D82 D83 D84 D85 D86 D87 D88

000000000001

8 bits

8 bits

8 bits

56 bits

56 bits

56 bits