HT16220
A.C. Characteristics
Ta=25°C
Test Conditions
Conditions
Symbol
Parameter
Min.
Typ.
Max.
Unit
VDD
3V
5V
3V
5V
¾
32
32
kHz
kHz
Hz
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
fSYS
System Clcok
Crystal oscillator
64
¾
fLCD
LCD Frame Frequency
LCD Common Period
Crystal oscillator
n: Number of COM
Duty cycle 50%
64
Hz
¾
tCOM
n/fLCD
sec
kHz
kHz
kHz
kHz
¾
3V
5V
3V
5V
150
300
75
¾
¾
¾
¾
fCLK1
Serial Data Clock (WR Pin)
fCLK2
Serial Data Clock (RD Pin)
Duty cycle 50%
CS
150
Serial Interface Reset Pulse Width
(Figure 3)
tCS
250
ns
¾
¾
¾
Write mode
Read mode
Write mode
Read mode
3.34
6.67
1.67
3.34
¾
¾
¾
¾
¾
¾
¾
¾
3V
ms
tCLK
WR, RD Input Pulse Width (Figure 1)
5V
ms
ns
ns
ns
ns
ns
3V
5V
3V
5V
3V
5V
3V
5V
3V
5V
Rise/Fall Time Serial Data Clock
(Figure 1)
tr, tf
tSU
th
120
120
120
100
100
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
Setup Time for DATA to WR, RD Serial
Data Clock (Figure 2)
Hold Time for DATA to WR, RD Serial
Data Clock (Figure 2)
Setup Time for CS to WR, RD Clock
Width (Figure 3)
tSU1
Hold Time for CS to WR, RD Clock Width
(Figure 3)
th1
V
A
L
I
D
D
A
T
A
V
G
D
D
t
f
t
r
D
B
5
0
%
-
V
D D
N
D
W
R
,
R
D
9
0
%
t
s
u
t
h
5
0
%
C
l
o
c
k
G
N
D
1
0
%
t
C
L
K
t
C
L
K
V
G
D
D
W
R
,
R
D
5
0
%
C
l
o
c
k
-
N
D
Figure 2
Figure 1
t
C S
-
V
D D
C
S
5
0
%
G
N
D
t
S
U
1
t
h 1
-
V
D D
W
R
,
R
D
5
0
%
C
l
o
c
k
G
N
D
F
I
R
S
T
L
A
S
T
C
l
o
c
k
C
l
o
c
k
Figure 3
Rev. 1.20
5
May 19, 2004
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
