PATENTED
HT1660
A.C. Characteristics
Ta=25°C
Symbol
Parameter
Test Conditions
VDD
Conditions
Min. Typ. Max.
fSYS1 System Clock
5V On-chip RC oscillator 24
32
40
fSYS2 System Clock
¾ Crystal oscillator
¾ 32768 ¾
fSYS3 System Clock
¾ External clock source ¾ 32768 ¾
fLCD1 LCD Frame Frequency
5V On-chip RC oscillator 61/117 89/170 111/213
fLCD2 LCD Frame Frequency
¾ Crystal oscillator
¾
64
¾
fLCD3 LCD Frame Frequency
¾ External clock source ¾
64
¾
tCOM LCD Common Period
¾ n: Number of COM
¾
n/fLCD
¾
fCLK1 4-Bit Data Clock (WR Pin)
3V
Duty cycle 50%
5V
¾
¾
150
¾
¾
300
fCLK2 4-Bit Data Clock (RD Pin)
3V
Duty cycle 50%
5V
¾
¾
75
¾
¾
150
tCS
4-Bit Interface Reset Pulse Width
(Figure 3)
¾
CS
150
250
¾
Write mode
3V
Read mode
tCLK WR, RD Input Pulse Width (Figure 1)
Write mode
5V
Read mode
3.34
¾
¾
6.67
1.67
¾
¾
3.34
Unit
kHz
Hz
Hz
Hz
Hz
Hz
sec
kHz
kHz
kHz
kHz
ns
ms
ms
tr, tf
Rise/Fall Time Serial Data Clock ¾
Width (Figure 1)
¾
¾
¾
120
160
ns
tsu
Setup Time for DB to WR, RD Clock ¾
Width (Figure 2)
¾
¾
80
120
¾
ns
th
Hold Time for DB to WR, RD Clock ¾
Width (Figure 2)
¾
¾
60
120
¾
ns
tsu1
Setup Time for CS to WR, RD Clock ¾
Width (Figure 3)
¾
¾
50
100
¾
ns
th1
Setup Time for CS to WR, RD Clock ¾
Width (Figure 3)
¾
¾
50
100
¾
ns
ftone2k Tone Frequency
5V On-chip RC oscillator 1.5
2
2.5
kHz
ftone4k Tone Frequency
5V On-chip RC oscillator 3
4
5
kHz
Rev. 1.70
7
November 9, 2010