HT1650(2005) 查看數據表（PDF） - Holtek Semiconductor
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HT1650 Datasheet PDF : 18 Pages
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HT1650
A.C. Characteristics
Ta=25°C
Symbol
Parameter
fSYS1 System Clock
Test Conditions
VDD
Conditions
Min. Typ. Max. Unit
3V
22
32
40
kHz
On-chip RC oscillator
5V
24
32
40
kHz
fSYS2 System Clock
3V
Crystal oscillator
5V
¾ 32.768 ¾
kHz
¾ 32.768 ¾
kHz
fSYS3 System Clock
fLCD1 LCD Frame Frequency
3V
¾
32
¾
kHz
External clock source
5V
¾
32
¾
kHz
3V
61/117 89/170 111/213 Hz
On-chip RC oscillator
5V
61/117 89/170 111/213 Hz
fLCD2 LCD Frame Frequency
3V
Crystal oscillator
5V
¾
64
¾
Hz
¾
64
¾
Hz
fLCD3 LCD Frame Frequency
3V
¾
64
¾
Hz
External clock source
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%
5V
¾
¾
150 kHz
¾
¾
300 kHz
fCLK2 4-Bit Data Clock (RD Pin)
3V
Duty cycle 50%
5V
¾
¾
75
kHz
¾
¾
150 kHz
tCS
4-Bit Interface Reset Pulse Width
(Figure 3)
¾
CS
¾
250
¾
ns
Write mode
3V
Read mode
tCLK WR, RD Input Pulse Width (Figure 1)
Write mode
5V
Read mode
3.34
¾
¾
ms
6.67
1.67
¾
¾
ms
3.34
tr, tf
Rise/Fall Time Serial Data Clock 3V
Width (Figure 1)
5V
¾
¾
120
¾
ns
tsu
Setup Time for DB to WR, RD Clock 3V
Width (Figure 2)
5V
¾
¾
120
¾
ns
th
Hold Time for DB to WR, RD Clock 3V
Width (Figure 2)
5V
¾
¾
120
¾
ns
tsu1
Setup Time for CS to WR, RD Clock 3V
Width (Figure 3)
5V
¾
¾
100
¾
ns
th1
Hold Time for CS to WR, RD Clock 3V
Width (Figure 3)
5V
¾
¾
100
¾
ns
Rev. 1.20
6
November 10, 2005
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