TECHNICAL DATA
IN472-3
Liquid Crystal Display Controller
The IN472-3-3 Liquid Crystal Display (LDC) Controller is a
perpheral member of the COPS
TM
family, fabricated using CMOS
technology. The IN472-3 drives a multiplexed liquid crystal directly.
Data is loaded serially and is held in internal latches. The In472-3
contains an on-chip oscillator and generates all the multi-level
waveforms for back-planes and segment outputs on a triplex display.
One IN472-3 can drive 36 segments multiplexed as 3 x 12 (4
1
/
2
digit
display). Two IN472-3 devices can be used together to drive
72 segments (3 x 24) which could be an 8
1
/
2
digit display.
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Direct interface to TRIPLEX LCD
Low power dissipation (100
µW
typ.)
Low cost
Compatible with all COP400 processors
Needs no refresh from processor
On-chip oscillator and latches
Expandable to longer displays
Software compatible with COP470 V.F.Display Driver Chip
Operates from display voltage
MICROWIRE
TM
compatible serial I/O
20-pin Dual-In-Line package
ORDERING INFORMATION
IN472-3N Plastic
IN472-3DW SOIC
T
A
= 0° to 70° C
for all packages
PIN ASSIGNMENT
Pin Description
Pin
CS
V
DD
GND
DI
SK
BP
A
BP
B
BP
C
SA1∼SA4
Chip select
Power supply (display voltage)
Ground
Serial data input
Serial clock input
Display backplane A (or oscillator in)
Display backplane B
Display backplane C (or oscillator out)
12 multiplexed outputs
Description
1
INTEGRAL [ INTEGRAL CORP. ]
