HT16220 Datasheet, PDF (7/17 Pages) Holtek Semiconductor Inc – RAM Mapping 32x8 LCD Controller for I/O C

HT16220
A.C. Characteristics
Ta=25°C
Symbol
Parameter
f_SYS
System Clock
Test Conditions
V_DD
Conditions
3V
Crystal oscillator
5V
f_LCD
LCD Frame Frequency
3V
Crystal oscillator
5V
t_COM
f_CLK1
LCD Common Period
Serial Data Clock (WR Pin)
¾ n: Number of COM
3V
Duty cycle 50%
5V
f_CLK2 Serial Data Clock (RD Pin)
3V
Duty cycle 50%
5V
t_CS
Serial Interface Reset Pulse
Width
(Figure 3)
¾
CS
t_CLK
WR, RD Input Pulse Width
Write mode
3V
Read mode
(Figure 1)
Write mode
5V
Read mode
t_r, t_f
Rise/Fall Time Serial Data ^3V
Clock
(Figure 1) _5V
¾
Setup Time for DATA to WR, 3V
t_SU
RD Serial Data Clock
¾
(Figure 2) ^5V
Hold Time for DATA to WR, 3V
t_h
RD Serial Data Clock
¾
(Figure 2) ^5V
t_SU1
Setup Time for CS to WR, RD ^3V
Clock Width
(Figure 3) _5V
¾
t_h1
Hold Time for CS to WR, RD ^3V
Clock Width
(Figure 3) _5V
¾
Min. Typ. Max. Unit
¾ 32 ¾ kHz
¾ 32 ¾ kHz
¾ 64 ¾ Hz
¾ 64 ¾ Hz
¾ n/f_LCD 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 ¾
1.67 ¾
3.34 ¾
¾
ms
¾
¾
ms
¾
¾ 120 ¾ ns
¾ 120 ¾ ns
¾ 120 ¾ ns
¾ 100 ¾ ns
¾ 100 ¾ ns
7
April 21, 2000