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KODENSHI KOREA
KODENSHI KOREA

KK472 Datasheet Preview

KK472 Datasheet

Liquid Crystal Display Controller

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KK472 pdf
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TECHNICAL DATA
Liquid Crystal Display Controller
KK472
The KK472 Liquid Crystal Display (LDC) Controller is a perpheral
member of the COPSTM 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
MICROWIRETM compatible serial I/O
20-pin Dual-In-Line package
ORDERING INFORMATION
KK472N Plastic
KK472DW SOIC
TA = 0° to 70° C for all packages
PIN ASSIGNMENT
Pin Description
Pin
CS
VDD
GND
DI
SK
BPA
BPB
BPC
SA1SA4
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



KODENSHI KOREA
KODENSHI KOREA

KK472 Datasheet Preview

KK472 Datasheet

Liquid Crystal Display Controller

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KK472 pdf
www.DataSheet4U.com
KK472
DC ELECTRICAL CHARACTERISTICS (GND=0 V, VDD=3.0 V to 5.5 V, TA= 0°C to 70°C (depends on
display characteristics)
Symbol
VDD
IDD
VIL
VIH
VIL
VIH
VOL
VOH
VBPA,BPB,BPC
ON
VBPA,BPB,BPC
OFF
VBPA,BPB,BPC
ON
VBPA,BPB,BPC
OFF
VSEG ON
VSEG OFF
VSEG ON
VSEG OFF
1/TSCAN
tSETUP
tHOLD
tSETUP
tHOLD
Parameter
Power Supply Voltage
Power Supply Current (Note 1)
Input Levels DI, SK, CS
BPA (as Osc. in)
Output Levels, BPC (as Osc. Out)
Backplane Outputs (BPA,BPB,BPC)
Backplane Outputs (BPA,BPB,BPC)
Segment Outputs (SA1 SA4)
Segment Outputs (SA1 SA4)
Internal Oscillator Frequency
Frame Time (Int. Osc. ÷ 192)
Scan Frequency
SK Clock Frequency
SK Width
DI Data Stup
DI Data Hold
CS
Output Loading Capacitance
Test
Conditions
VDD =5.5 V
During
BP + Time
During
BP - Time
During
BP + Time
During
BP - Time
Guaranteed Limit
Min Max
3.0
0.7 VDD
VDD-0.6
VDD-0.4
5.5
250
0.8
VDD
0.6
VDD
0.4
VDD
VDD -V
1/3VDD -V
VDD
1/3VDD +V
Uni
t
V
µA
V
V
V
V
0
2/3VDD -V
V
2/3VDD +V
V
0
2/3VDD -V
VDD -V
1/3VDD -V
15
2.4
39
4
1.7
1.0
100
1.0
1.0
V
2/3VDD +V
VDD
1/3VDD +V
80
12.8
208
250
V
V
kHz
ms
Hz
kHz
µs
µs
ns
µs
100 pF
Note 1: Power supply current as measured in stand-alone mode with all outputs open and all inputs at VDD.
Note 2: V - 0.05VDD.
2


Part Number KK472
Description Liquid Crystal Display Controller
Maker KODENSHI KOREA
Total Page 4 Pages
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