HT16220
A.C. Characteristics
Symbol
Parameter
Test Conditions
V
DD
3V
System Clcok
5V
f
LCD
t
COM
f
CLK1
3V
LCD Frame Frequency
5V
LCD Common Period
Serial Data Clock (WR Pin)
5V
f
CLK2
3V
Serial Data Clock (RD Pin)
5V
t
CS
Serial Interface Reset Pulse Width
(Figure 3)
¾
3V
t
CLK
Read mode
WR, RD Input Pulse Width (Figure 1)
Write mode
5V
Read mode
t
r
, t
f
Rise/Fall Time Serial Data Clock
(Figure 1)
Setup Time for DATA to WR, RD Serial
Data Clock (Figure 2)
3V
5V
3V
5V
¾
3.34
¾
1.67
6.67
CS
Write mode
Duty cycle 50%
¾
3V
Duty cycle 50%
n: Number of COM
Crystal oscillator
Crystal oscillator
Conditions
Min.
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
3.34
Typ.
32
32
64
64
n/f
LCD
¾
¾
¾
¾
250
¾
¾
¾
¾
120
Max.
¾
¾
¾
¾
¾
150
300
75
150
¾
¾
¾
¾
¾
¾
Ta=25°C
Unit
kHz
kHz
Hz
Hz
sec
kHz
kHz
kHz
kHz
ns
ms
f
SYS
ms
ns
t
SU
¾
¾
120
¾
ns
t
h
Hold Time for DATA to WR, RD Serial 3V
Data Clock (Figure 2)
5V
Setup Time for CS to WR, RD Clock 3V
Width (Figure 3)
5V
Hold Time for CS to WR, RD Clock Width 3V
(Figure 3)
5V
¾
¾
120
¾
ns
t
SU1
¾
¾
100
¾
ns
t
h1
¾
¾
100
¾
ns
V A L ID D A T A
t
f
W R , R D
C lo c k
9 0 %
5 0 %
1 0 %
t
r
-
V
t
C
L K
D D
D B
V
t
h
D D
5 0 %
t
s
u
G N D
V
D D
t
C
L K
G N D
W R , R D
C lo c k
5 0 %
-
G N D
Figure 1
t
C
S
Figure 2
C S
5 0 %
t
S
U 1
-
V
D D
t
h
1
G N D
-
V
D D
W R , R D
C lo c k
5 0 %
F IR S T
C lo c k
L A S T
C lo c k
G N D
Figure 3
Rev. 1.20
5
May 19, 2004
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
