HT1670 Ver la hoja de datos (PDF) - Holtek Semiconductor
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HT1670 Datasheet PDF : 20 Pages
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PATENTED
HT1670
A.C. Characteristics
Symbol
Parameter
fSYS1
fSYS2
System Clock
System Clock
Test Conditions
VDD
Conditions
5V On-chip RC oscillator
¾ Crystal oscillator
fSYS3 System Clock
¾ External clock source
fLCD1
fLCD2
LCD Frame Frequency
LCD Frame Frequency
5V On-chip RC oscillator
¾ Crystal oscillator
fLCD3 LCD Frame Frequency
¾ External clock source
tCOM LCD Common Period
¾ n: Number of COM
fCLK1 4-Bit Data Clock (WR Pin)
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
(Figure 1)
Write mode
3V
Read mode
Write mode
5V
Read mode
tr, tf
Rise/Fall Time Serial Data
Clock Width (Figure 1)
¾
¾
tsu
Setup Time for DATA to WR,
RD Clock Width (Figure 2)
¾
¾
th
Hold Time for DATA to WR,
RD Clock Width (Figure 2)
¾
¾
tsu1
Setup Time for CS to WR,
RD Clock Width (Figure 3)
¾
¾
th1
Hold Time for CS to WR,
RD Clock Width (Figure 3)
¾
¾
ftone2k
ftone4k
Tone Frequency
Tone Frequency
5V On-chip RC oscillator
5V On-chip RC oscillato
Ta=25°C
Min.
Typ.
Max.
Unit
24
32
40
kHz
¾
32768
¾
Hz
¾
32768
¾
Hz
61/117 89/170 111/213 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
150
250
¾
ns
3.34
¾
¾
ms
6.67
1.67
¾
¾
ms
3.34
¾
120
160
ns
80
120
¾
ns
60
120
¾
ns
50
100
¾
ns
50
100
¾
ns
1.5
2.0
2.5
kHz
3.0
4.0
5.0
kHz
Rev. 1.60
7
November 9, 2010
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