Holtek HT1622 - Hantronix, Inc

HT1622
A.C. Characteristics
Ta=25C
Symbol Parameter
V DD
Test Conditions
Conditions
Min. Typ. Max. Unit
f SYS1 System Clock 3V On-chip RC oscillator 22 32 40 kHz
5V 24 32 40 kHz
f SYS2
f LCD1
System Clock
LCD Frame Frequency
3V
External clock source
32 kHz
5V 32 kHz
3V
On-chip RC oscillator
44 64 80 Hz
5V 48 64 80 Hz
3V 64
f LCD2 LCD Frame Frequency
External clock source
5V 64
t COM LCD Common Period n: Number of COM n/f LCD sec
f CLK1
f CLK2
t CS
Serial Data Clock (WR pin)
Serial Data Clock (RD pin)
Serial Interface Reset Pulse
Width (Figure 3)
3V
Duty cycle 50%
150 kHz
5V 300 kHz
3V
Duty cycle 50%
75 kHz
5V 150 kHz
CS 250 ns
t CLK
t r ,t f
t su
t h
t su1
t h1
WR, RDInput Pulse Width
(Figure 1)
Rise/Fall Time Serial Data
Clock Width (Figure 1)
Setup Time for DATA to WR,
RD Clock Width (Figure 2)
Hold Time for DATA to WR,
RD, Clock Width (Figure 2)
Setup Time for CS to WR, RD
Clock Width (Figure 3)
Hold Time for CS to WR, RD
Clock Width (Figure 3)
3V Write mode 3.34 s
Read mode 6.67
5V Write mode 1.67 s
Read mode 3.34
3V
5V
3V
5V
3V
5V
3V
5V
3V
5V
120 ns
120 ns
120 ns
100 ns
100 ns
7 January 10, 2001