HT6222(2000) 查看數據表（PDF） - Holtek Semiconductor
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HT6222 Datasheet PDF : 13 Pages
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HT6221/HT6222
Symbol
Parameter
Test Conditions
VDD Conditions
IOL3 Output Sink Current for C1~C8
3V VO=0.3V
VIH1 Input High Voltage for R1~R8
3V
¾
VIL1 Input Low Voltage for R1~R8
3V
¾
VIH2 Input High Voltage for C1~C8
3V
¾
VIL2 Input Low Voltage for C1~C8
3V
¾
VIH3 Input High Voltage for AIN
3V
¾
VIL3 Input Low Voltage for AIN
3V
¾
RPH1 Input Pull-high Resistance for AIN 3V VIN=0V
RPL1 Input Pull-low Resistance for AIN 3V VIN=3V
RPL2 Input Pull-low Resistance for R1~R8 3V VIN=3V
RPL3 Input Pull-low Resistance for C1~C8 3V VIN=3V
fOSC System Frequency
¾
455kHz ceramic
resonator
Min. Typ. Max. Unit
10 30 ¾ mA
1.9 ¾ 3.0 V
0 ¾ 0.8 V
1.1 ¾ 3.0 V
0 ¾ 0.6 V
1.25 ¾ 3.0 V
0 ¾ 0.6 V
100 200 400 kW
70 150 250 kW
120 200 320 kW
300 500 1500 kW
¾ 455 ¾ kHz
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
C1 C2 C3 C4
C5 C6 C7 C8
R1
K1
K5
K 9 K 13 K 17 K 21 K 25 K 29
R2
K2
K 6 K 10 K 14 K 18 K 22 K 26 K 30
R3
K3
K 7 K 11 K 15 K 19 K 23 K 27 K 31
R4
K4
K 8 K 12 K 16 K 20 K 24 K 28 K 32
· The HT6222 keyboard form
C1
C2 C3 C4
C5 C6 C7 C8
R1
K1
K5
K 9 K 13 K 17 K 21 K 25 K 29
R2
K2
K 6 K 10 K 14 K 18 K 22 K 26 K 30
R3
K3
K 7 K 11 K 15 K 19 K 23 K 27 K 31
R4
K4
K 8 K 12 K 16 K 20 K 24 K 28 K 32
R 5 K 33 K 37 K 41 K 45 K 49 K 53 K 57 K 61
R 6 K 34 K 38 K 42 K 46 K 50 K 54 K 58 K 62
R 7 K 35 K 39 K 43 K 47 K 51 K 55 K 59 K 63
R8
K 36 K 40 K 44 K 48 K 52 K 56 K 60 K 64
5
March 2, 2000
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