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LC75874 Schematic ( PDF Datasheet ) - Sanyo Semicon Device

Teilenummer LC75874
Beschreibung 1/4-Duty General-Purpose LCD Display Driver
Hersteller Sanyo Semicon Device
Logo Sanyo Semicon Device Logo 




Gesamt 16 Seiten
LC75874 Datasheet, Funktion
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






LC75874 Datasheet, Funktion
Serial Data Transfer Format
1. When CL is stopped at the low 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
Fixed data
10 bits
DD
2 bits
CCB address
8 bits
Display data
64 bits
Fixed data
14 bits
DD
2 bits
CCB address
8 bits
Note: DD is the direction data.
Display data
64 bits
Fixed data
14 bits
DD
2 bits
No. 4465-No. 5800-6/16

6 Page









LC75874 pdf, datenblatt
1/4-Duty 1/3-Bias Drive Scheme
LC75874E, 75874W
COM1
COM2
COM3
COM4
LCD driver output when all LCD segments
corresponding to COM1, COM2, COM3, and
COM4 are off.
LCD driver output when only LCD segments
corresponding to COM1
are on (lit).
LCD driver output when only LCD segments
corresponding to COM2
are on.
LCD driver output when LCD
segments corresponding to COM1
and COM2 are on.
LCD driver output when only LCD segments
corresponding to COM3
are on.
LCD driver output when LCD
segments corresponding to COM1
and COM3 are on.
LCD driver output when LCD
segments corresponding to COM2
and COM3 are on.
LCD driver output when LCD segments
corresponding to COM1, COM2, and COM3
are on.
LCD driver output when only LCD segments
corresponding to COM4 are on.
LCD driver output when LCD segments
corresponding to COM2, and COM4 are on.
LCD driver output when all LCD segments
corresponding to COM1, COM2, COM3, and
COM4 are on.
1/4-Duty 1/3-Bias Waveforms
No. 4465-No. 5800-12/16

12 Page





SeitenGesamt 16 Seiten
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