HT82K68 Holtek Semiconductor Inc, HT82K68 Datasheet - Page 4

• Manufacturer Part Number: HT82K68
• Description: Multimedia Keyboard Encoder OTP
• Manufacturer: Holtek Semiconductor Inc

Note: *: Software means the ROM code option can be configured by HT-IDE (Holtek Integrated De-
Absolute Maximum Ratings
Supply Voltage .............................-0.3V to 5.5V
Input Voltage ................V
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-
PC2~PC3
PC4~PC7
PD0~PD7
PE0~PE1
PE2~PE4
VDD
VSS
RESET
OSC1
OSC2
Pin Name I/O
mum Ratings² may cause substantial damage to the device. Functional operation of this device
at other conditions beyond those listed in the specification is not implied and prolonged expo-
sure to extreme conditions may affect device reliability.
velopment Environment).
I/O
I/O
I/O
I/O
¾
¾
O
O
I
I
ROM Code
Crystal or
Pull-high
Pull-high
Pull-high
Pull-high
Wake-up
Option
or None
or None
or None
or None
RC
¾
¾
¾
¾
SS
-0
.
3V to V
Bidirectional 2-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.
Bidirectional 4-bit input/output port. Software* instructions de-
termine the CMOS output or schmitt trigger input with or without
pull-high resistor.
Bidirectional 8-bit input/output port. Software* instructions de-
termine the CMOS output or schmitt trigger input with or without
pull-high resistor.
Bidirectional input/output port. Software* instructions determine
the CMOS output or schmitt trigger input with or without
pull-high resistor.
This pin is an NMOS output structure. The pad can function as
LED drivers for the keyboard. I
Positive power supply
Negative power supply, ground
Chip reset input. Active low. Built-in power-on reset circuit to re-
set the entire chip. Chip can also be externally reset via RESET
pin
OSC1, OSC2 are connected to an RC network or a crystal for the
internal system clock. In the case of RC operation, OSC2 is the
output terminal for the 1/4 system clock; A 110kW resistor is con-
nected to OSC1 to generate a 2MHZ frequency.
DD
Preliminary
+0.3V
4
Storage Temperature ................-50°C to 125°C
Operating Temperature .............-25°C to 70°C
Description
OL
=14mA, @V
OL
=3.2V
HT82K68E
August 8, 2000