64CH Segment Driver For Dot Matrix LCD
13
© 1998 Intech LCD Group Ltd.
CHAPTER 3
Driver IC Function Description
KS0108 Driver IC
64 SEG graphic driver for dot matrix LCD
Introduction
The KS0108B is an LCD driver LSI with 64 channel outputs for dot matrix liquid crystal graphic
display systems. This device consists of the display RAM, 64 bit data latch 64 bit drivers and decoder
logics. It has the internal display RAM for storing the display data transferred from a 8 bit micro
controller and generates the dot matrix liquid crystal driving signals corresponding to stored data. The
KS0108B composed of the liquid crystal display system in combination with the KS0107B(64
common driver).
AC Characteristics (V
DD
=4.5~5.5V ,V
SS
=0V, Ta=-30? ~+85? )
(
1
)
Clock Timing
Characteristic
Symbol
Min
Typ
Max
Unit
CLK1, CLK2 Cycle Time
t
CY
2.5
-
20
?
s
CLK1
‘
LOW
’
Level Width
t
WL1
625
-
-
CLK2
‘
LOW
’
Level Width
t
WL2
625
-
-
CLK1
‘
HIGH
’
Level Width
t
WH1
1875
-
-
CLK2
‘
HIGH
’
Level Width
t
WH2
1875
-
-
CLK1-CLK2 Phase Difference
t
D12
625
-
-
CLK2-CLK1 Phase Difference
t
D21
625
-
-
CLK1, CLK2 Rise Time
t
R
-
-
150
CLK1, CLK2 Fall Time
t
F
-
-
150
ns
