ht82k68a Holtek Semiconductor Inc., ht82k68a Datasheet - Page 3

• Manufacturer Part Number: ht82k68a
• Description: Ht82k68a -- Multimedia Keyboard Encoder 8-bit Mask Mcu
• Manufacturer: Holtek Semiconductor Inc.

Pin Assignment
Pin Description
Rev. 1.70
PA0~PA7
PB0~PB7
PC0
PC1
PC2~PC3
PC4~PC7
PD0~PD7
Pin Name I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Wake-up
Wake-up
Wake-up
Wake-up
Pull-high
Pull-high
Pull-high
Pull-high
Pull-high
Pull-high
Pull-high
or None
or None
or None
or None
or None
or None
or None
Option
Mask
Bidirectional 8-bit input/output port. Each bit can be configured as a wake-up input
by mask option. Software* instructions determine the CMOS output or Schmitt trig-
ger input with or without 12K pull-high resistor.
Bidirectional 8-bit input/output port. Software* instructions determine the output or
Schmitt trigger input with or without pull-high resistor.
This pin is an I/O port. NMOS 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 in-
put by mask option.
This pin is an I/O port. NMOS 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 in-
put by mask option.
Bidirectional 2-bit input/output port. Each bit can be configured as a wake-up input
by mask option. Software* instructions determine the CMOS output or Schmitt trig-
ger input with or without pull-high resistor.
PC2 also as external interrupt input pin. PE0 determine whether rising edge or fall-
ing edge of PC2 to trigger the INT circuit.
Bidirectional 4-bit input/output port. Software* instructions determine the CMOS
output or Schmitt trigger input with or without pull-high resistor.
Bidirectional 8-bit input/output port. Software* instructions determine the CMOS
output or Schmitt Trigger input with or without pull-high resistor.
3
Description
December 26, 2005
HT82K68A