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HT1647 Datasheet(PDF) 8 Page - Holtek Semiconductor Inc

Part # HT1647
Description  4-Level Gray Scale 64x16 LCD Controller for I/O C
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT1647 Datasheet(HTML) 8 Page - Holtek Semiconductor Inc

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A.C. Characteristics
Ta=25°C
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VDD
Conditions
fSYS1
System Clock
3V
On-chip RC oscillator
22
32
40
kHz
5V
24
32
40
kHz
fSYS2
System Clock
3V
Crystal oscillator
¾ 32.768
¾
kHz
5V
¾ 32.768
¾
kHz
fSYS3
System Clock
3V
External clock source
¾
32
¾
kHz
5V
¾
32
¾
kHz
fLCD1
LCD Frame Frequency
3V
On-chip RC oscillator
44
64
80
Hz
5V
48
64
80
Hz
fLCD2
LCD Frame Frequency
3V
Crystal oscillator
¾
64
¾
Hz
5V
¾
64
¾
Hz
fLCD3
LCD Frame Frequency
3V
External clock source
¾
64
¾
Hz
5V
¾
64
¾
Hz
tCOM
LCD Common Period
¾ n: Number of COM
¾
n/fLCD ¾
sec
fCLK1
4-Bit Data Clock (WR Pin)
3V
Duty cycle 50%
¾¾
150
kHz
5V
¾¾
300
kHz
fCLK2
4-Bit Data Clock (RD Pin)
3V
Duty cycle 50%
¾¾
75
kHz
5V
¾¾
150
kHz
tCS
4-Bit Interface Reset Pulse
Width
(Figure 3) ¾ CS
¾
250
¾
ns
tCLK
WR,RD Input Pulse Width
(Figure 1)
3V
Write mode
3.34
¾¾
ms
Read mode
6.67
5V
Write mode
1.67
¾¾
ms
Read mode
3.34
tr,tf
Rise/Fall Time Serial Data
Clock Width
(Figure 1)
3V
¾¾
120
¾
ns
5V
tsu
Setup Time for DB to WR,
RD Clock Width
(Figure 2)
3V
¾¾
120
¾
ns
5V
th
Hold Time for DB to WR,RD
Clock Width
(Figure 2)
3V
¾¾
120
¾
ns
5V
tsu1
Setup Time for CS to WR,RD
Clock Width
(Figure 3)
3V
¾¾
100
¾
ns
5V
th1
Hold Time for CS to WR,RD
Clock Width
(Figure 3)
3V
¾¾
100
¾
ns
5V
HT1647
8
April 21, 2000


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