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HT82K68E Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

Part # HT82K68E
Description  Multimedia Keyboard Encoder OTP
PDF  40 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT82K68E Datasheet(HTML) 3 Page - Holtek Semiconductor Inc

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Pin Assignment
Pin Description
Pin Name I/O ROM Code
Option
Description
PA0~PA7
I/O
Wake-up
Pull-high
or None
Bidirectional 8-bit input/output port. Each bit can be configured
as a wake-up input by ROM code option. Software* instructions
determine the CMOS output or schmitt trigger input with or with-
out pull-high resistor 12K.
PB0~PB7
I/O
Pull-high
or None
Bidirectional 8-bit input/output port. Software* instructions de-
termine the CMOS output or schmitt trigger input with or without
pull-high resistor.
PC0
I/O
Wake-up
Pull-high
or None
This pin is an I/O port. Open drain output with pull-high resistor
and can be used as DATA or CLOCK line of PS2. This pin can be
configured as a wake-up input by ROM code option.
PC1
I/O
Wake-up
Pull-high
or None
This pin is an I/O port. open drain output with pull-high resistor
and can be used as DATA or CLOCK line of . This pin can be con-
figured as a wake-up input by ROM code option.
HT82K68E
3
August 8, 2000
Preliminary
PB6
PB7
PA4
PA5
PA6
PA7
OS C 2
OS C 1
VD D
R ESET
PE4 ( L ED )
PD 3
PD 2
PD 1
PD 0
PC 7
PC 6
PC 5
PC 4
PC 3
PB5
PB4
PA3
PA2
PA1
PA0
PB3
PB2
PB1
PB0
PD 7
PD 6
PD 5
PD 4
VSS
PE2 ( L ED )
PE3 ( L ED )
PC 0
PC 1
PC 2
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
PB5
PB4
PA3
PA2
PA1
PA0
PB3
PB2
PB1
PB0
PD 7
PD 6
PD 5
PD 4
VSS
PE2 ( L ED )
PE3 ( L ED )
PC 0
PC 1
PC 2
PE0
PB6
PB7
PA4
PA5
PA6
PA7
OS C 2
OS C 1
VD D
R ESET
PE4 ( L ED )
PD 3
PD 2
PD 1
PD 0
PC 7
PC 6
PC 5
PC 4
PC 3
PE1
H T 8 2K 68E
4 0 D I P
H T 8 2K 68E
4 2 D I P



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