LC75874 데이터시트 PDF

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Ordering number : EN5800

CMOS LSI

LC75874E, 75874W

1/4-Duty General-Purpose LCD Display Driver

Overview

The LC75874E and LC75874W are 1/4-duty general-

purpose microprocessor-controlled LCD driver that can be

used in applications such as frequency display in products

with electronic tuning. In addition to being able to drive

up to 264 segments directly, the LC75874E and

LC75874W can also control up to 8 general-purpose

output ports.

Since the LC75874E and LC75874W use separate power

supply systems for the LCD drive block and the logic

block, the LCD driver block power-supply voltage can be

set to any voltage in the range 2.7 to 6.0 V, regardless of

the logic block power-supply voltage.

Features

• Support for 1/4-duty 1/2-bias or 1/4-duty 1/3-bias drive

techniques under serial data control (up to

264 segments)

• Serial data input supports CCB format communication

with the system controller.

• Serial data control of the power-saving mode based

backup function and the all segments forced off

function.

• Serial data control of switching between the segment

output port and general-purpose output port functions.

• High generality, since display data is displayed directly

without the intervention of a decoder circuit.

• Independent VLCD for the LCD driver block (VLCD can

be set to any voltage in the range 2.7 to 6.0 V,

regardless of the logic block power-supply voltage.)

• The INH pin allows the display to be forced to the off

state.

• RC oscillator circuit

Package Dimensions

unit: mm

3174-QFP80E

[LC75874E]

unit: mm

3220-SQFP80

[LC75874W]

SANYO: QFP80E

SANYO: SQFP80

• CCB is a trademark of SANYO ELECTRIC CO., LTD.

• CCB is SANYO’s original bus format and all the bus

addresses are controlled by SANYO.

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

31398RM (OT) No. 5800-1/16

1. When CL is stopped at the low level

LC75874E, 75874W

2. When CL is stopped at the high level

Block Diagram

Figure 2

No. 4465-No. 5800-4/16

2. When CL is stopped at the high level

LC75874E, 75874W

CCB address

8 bits

Display data

68 bits

Control data

10 bits

DD

2 bits

CCB address

8 bits

Display data

68 bits

Control data

10 bits

DD

2 bits

CCB address

8 bits

Display data

64 bits

Control data

14 bits

DD

2 bits

CCB address

8 bits

Note: DD is the direction data.

Display data

64 bits

Control data

14 bits

• CCB address......45H

• D1 to D264........Display data

• P0 to P3 .............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

DD

2 bits

No. 4465-No. 5800-7/16

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