KK472 Datasheet, PDF (1/4 Pages) KODENSHI KOREA CORP. – Liquid Crystal Display Controller

TECHNICAL DATA
Liquid Crystal Display Controller
KK472
The KK472 Liquid Crystal Display (LDC) Controller is a perpheral
member of the COPS^TM family, fabricated using CMOS technology. The
KK472 drives a multiplexed liquid crystal directly. Data is loaded serially
and is held in internal latches. The KK472 contains an on-chip oscillator and
generates all the multi-level waveforms for back-planes and segment
outputs on a triplex display. One KK472 can drive 36 segments multiplexed
as 3 x 12 (4¹/₂ digit display). Two KK472 devices can be used together to
drive 72 segments (3 x 24) which could be an 8¹/₂ digit display.
• 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
KK472N Plastic
KK472DW 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
Description
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
1