HT1660
A.C. Characteristics
Symbol
Parameter
Test Conditions
V
DD
3V
System Clock
5V
3V
f
SYS2
System Clock
5V
3V
f
SYS3
System Clock
5V
f
LCD1
3V
LCD Frame Frequency
5V
3V
f
LCD2
LCD Frame Frequency
5V
3V
f
LCD3
t
COM
f
CLK1
LCD Frame Frequency
5V
LCD Common Period
4-Bit Data Clock (WR Pin)
5V
3V
f
CLK2
4-Bit Data Clock (RD Pin)
5V
t
CS
4-Bit 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 3V
Width (Figure 1)
5V
Setup Time for DB to WR, RD Clock 3V
Width (Figure 2)
5V
Hold Time for DB to WR, RD Clock 3V
Width (Figure 2)
5V
Setup Time for CS to WR, RD Clock 3V
Width (Figure 3)
5V
Hold Time for CS to WR, RD Clock 3V
Width (Figure 3)
5V
¾
3.34
¾
1.67
¾
¾
¾
ms
6.67
CS
Write mode
Duty cycle 50%
¾
3V
Duty cycle 50%
n: Number of COM
External clock source
Crystal oscillator
On-chip RC oscillator
61/117
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
3.34
89/170 111/213
64
64
64
64
n/f
LCD
¾
¾
¾
¾
250
¾
¾
¾
¾
¾
¾
150
300
75
150
¾
¾
Hz
Hz
Hz
Hz
Hz
sec
kHz
kHz
kHz
kHz
ns
ms
External clock source
Crystal oscillator
On-chip RC oscillator
24
¾
¾
¾
¾
61/117
32
32.768
32.768
32
32
40
¾
¾
¾
¾
kHz
kHz
kHz
kHz
kHz
Hz
Conditions
Min.
22
Typ.
32
Max.
40
Ta=25°C
Unit
kHz
f
SYS1
89/170 111/213
120
ns
t
su
¾
¾
120
¾
ns
t
h
¾
¾
120
¾
ns
t
su1
¾
¾
100
¾
ns
t
h1
¾
¾
100
¾
ns
Rev. 1.30
7
April 13, 2006
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
