LC450029PKB

www.onsemi.com

6

Pad Functions

Symbol

Pad No.

Function

Active

I/O

Handling

when

unused

COM1 to

COM4

2 to 5

Common driver outputs.

The frame frequency is fo[Hz].

COM4 pad outputs the VSS level in 1/3-duty.

-

O

OPEN

S1 to S53

6 to 58

Segment outputs for displaying the display data transferred by serial data input.

S51 pad outputs the VSS level in 1/4-duty.

S52 pad and S53 pad output the VSS level at the control data DN=“0”.

S53 pad outputs the VSS level at external clock operating mode.

-

O

OPEN

INH

61

Display off control input

• INH = low (VSS) ...Display forced off (VSS level Output)

S1 to S53 = low (VSS)

COM1 to COM4 = low (VSS)

The internal oscillator stops.

Stops inputting external clock.

Serial data transfer can be used.

• INH = high (VDD)...Display on

Enables the internal oscillator circuit.

(Internal oscillator operating mode)

Enables external clock input.

(External clock operating mode)

While display on, LCD outputs force off (VSS level output)

by the control data BU=“1”.

While display on, LCD outputs off (off waveforms output)

by the control data SC=“1”.

L

I

GND

(VSS)

CE

62

Serial data transfer inputs. Must be connected to the controller.

CE: Chip enable

DI: Transfer data

CL: Synchronization clock

H

I

GND

(VSS)

DI

63

-

I

CL

64

I

VLOGIC

65

Used to monitor pad for the power supply voltage of the logic circuit.

-

O

OPEN

VDDI

66 to 71

Power supply pad. A power voltage of 4.5 to 6.0V must be applied to these

pads.

-

-

-

OSCI

72

This pad can also be used as the external clock input pad when the external

clock operating mode is selected by control data.

This pad must be connected to GND at internal oscillator operating mode.

-

I

GND

(VSS)

VSS

73 to 90

Ground pad. Must be connected to ground.

-

-

-

VDD2

91

Used to monitor pad for the LCD drive bias voltage (1/3 VDD).

-

O

OPEN

VDD1

92

Used to monitor pad for the LCD drive bias voltage (2/3 VDD).

-

O

OPEN

VDD

93 to 105

Power supply pad. A power voltage of 4.5 to 6.0V must be applied to these

pads.

-

-

-

DUMMY

1, 59,

60, 106

Dummy pad. Must not be used.

-

OPEN

OPEN

(Note)

 Power supply pads (VDD, VDDI) should connect all pads to the same power supply.

(See sample applications circuits)

 GND pad (VSS) should connect all pads to the GND.

 When logic input pads (INH, CE, DI, CL, OSCI) are not used, must be fixed to GND (VSS).

 Must not use monitor pads (VLOGIC, VDD1, VDD2) in an external circuit.

 Must not connect dummy pad (DUMMY) mutually. Moreover, never use it in an external circuit.