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HT6221 Datasheet(PDF) 5 Page - Holtek Semiconductor Inc

No. de pieza HT6221
Descripción Electrónicos  Multi-Purpose Encoders
PDF  13 Pages
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Fabricante Electrónico  HOLTEK [Holtek Semiconductor Inc]
Página de inicio  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT6221 Datasheet(HTML) 5 Page - Holtek Semiconductor Inc

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Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VDD
Conditions
IOL3
Output Sink Current for C1~C8
3V VO=0.3V
10
30
¾mA
VIH1
Input High Voltage for R1~R8
3V
¾
1.9
¾
3.0
V
VIL1
Input Low Voltage for R1~R8
3V
¾
0
¾
0.8
V
VIH2
Input High Voltage for C1~C8
3V
¾
1.1
¾
3.0
V
VIL2
Input Low Voltage for C1~C8
3V
¾
0
¾
0.6
V
VIH3
Input High Voltage for AIN
3V
¾
1.25
¾
3.0
V
VIL3
Input Low Voltage for AIN
3V
¾
0
¾
0.6
V
RPH1
Input Pull-high Resistance for AIN
3V VIN=0V
100
200
400
kW
RPL1
Input Pull-low Resistance for AIN
3V VIN=3V
70
150
250
kW
RPL2
Input Pull-low Resistance for R1~R8 3V VIN=3V
120
200
320
kW
RPL3
Input Pull-low Resistance for C1~C8 3V VIN=3V
300
500 1500 kW
fOSC
System Frequency
¾ 455kHz ceramic
resonator
¾
455
¾
kHz
HT6221/HT6222
5
March 2, 2000
Functional Description
Keyboard scan
The HT6221/HT6222 remain in the halt mode
during the standby state (at this time, the oscil-
lator stops, and the standby current<1mA). The
HT6221 consists of 32 active keys, and the
HT6222 has 64 active keys. The keyboard
forms of the HT6221/ HT6222 are shown below.
· The HT6221 keyboard form
· The HT6222 keyboard form
C1
R1
R2
R3
R4
R5
R6
R7
R8
K1
K2
K3
K4
K3 3
K3 4
K3 5
K3 6
K5
K6
K7
K8
K3 7
K3 8
K3 9
K4 0
K9
K1 0
K1 1
K1 2
K4 1
K4 2
K4 3
K4 4
K1 3
K1 4
K1 5
K1 6
K4 5
K4 6
K4 7
K4 8
K1 7
K1 8
K1 9
K2 0
K4 9
K5 0
K5 1
K5 2
K2 1
K2 2
K2 3
K2 4
K5 3
K5 4
K5 5
K5 6
K2 9
K3 0
K3 1
K3 2
K6 1
K6 2
K6 3
K6 4
K2 5
K2 6
K2 7
K2 8
K5 7
K5 8
K5 9
K6 0
C2
C3
C4
C5
C6
C7
C8
K1
K2
K3
K4
K5
K6
K7
K8
K9
K1 0
K1 1
K1 2
K1 3
K1 4
K1 5
K1 6
C1
C2
C3
C4
R1
R2
R3
R4
K1 7
K1 8
K1 9
K2 0
K2 1
K2 2
K2 3
K2 4
K2 5
K2 6
K2 7
K2 8
K2 9
K3 0
K3 1
K3 2
C5
C6
C7
C8



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