HT1632 Просмотр технического описания (PDF) - Holtek Semiconductor
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HT1632 Datasheet PDF : 17 Pages
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A.C. Characteristics
Symbol
Parameter
Test Conditions
VDD
Conditions
fSYS
System Clock
5V On-chip RC oscillator
fLED
LED Duty Cycle & Frame
Frequency
5V 1/8 duty
5V 1/16 duty
fCLK1
Serial Data Clock (WR pin)
5V Duty cycle 50%
fCLK2
Serial Data Clock (RD pin)
5V Duty cycle 50%
tCS
Serial Interface Reset Pulse
Width
¾ CS
Write mode
tCLK
WR, RD Input Pulse Width
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
HT1632
Ta=25°C
Min. Typ. Max. Unit
¾ 256 ¾ kHz
¾ 97.5 ¾
Hz
¾ 97.5 ¾
Hz
4
¾
300 kHz
¾
¾
150 kHz
250 ¾
¾
ns
1.67 ¾
¾
ms
3.34 ¾
¾
120 ¾
¾
ns
120 ¾
¾
ns
120 ¾
¾
ns
100 ¾
¾
ns
100 ¾
¾
ns
tf
tr
W R ,R D 90%
C lo c k
50%
10%
V DD
D ATA
GND
V a lid D a ta
50%
V DD
GND
tC L K
tC L K
ts u
th
Figure 1
W R ,R D
C lo c k
V DD
50%
GND
Figure 2
CS
50%
tsu 1
tC S
V DD
GND
th 1
W R ,R D
50%
V DD
C lo c k
GND
F ir s t C lo c k
L a s t C lo c k
Figure 3
Rev. 1.00
4
October 2, 2007
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