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