ht82k72e Holtek Semiconductor Inc., ht82k72e Datasheet - Page 2

• Manufacturer Part Number: ht82k72e
• Description: Ht82k72e/ht82k72a -- One Channel Keyboard With R-f Type Mcu
• Manufacturer: Holtek Semiconductor Inc.

Pin Assignment
Pin Description
Rev. 1.00
PA0~PA1
PA2/TMR
PA3~PA7
PB0~PB7
PC0~PC5
PC6/RFD
PC7
PD0~PD7
PE0/Z1
PE1/Z2
PE2~PE3
OSC1
OSC2
Pin Name
I/O
I/O
I/O
I/O
I/O
I/O
O
I
Pull-high or None
Pull-high or None
Pull-high or None
Pull-high or None
Pull-high or None
Crystal or RC
Wake-up
Wake-up
Wake-up
Wake-up
Wake-up
Options
Bidirectional 8-bit input/output port. Each pin can be configured as a
wake-up input by a configuration option. Software instructions determine if
the pin is a CMOS output or Schmitt Trigger input. Configuration options de-
termine if the pins have pull-high resistors. PA2 is shared with the external
timer input pin TMR.
Bidirectional 8-bit input/output port. Each nibble, PB0~PB3 and PB4~PB7,
pin can be configured as wake-up inputs by configuration options. Software
instructions determine if the pin is a CMOS output or Schmitt Trigger input.
Configuration options determine if the pins have pull-high resistors.
Bidirectional 8-bit input/output port. Each nibble, PC0~PC3 and PC4~PC7,
can be configured as wake-up inputs by configuration options. Software in-
structions determine if the pin is a CMOS output or Schmitt Trigger input.
Configuration options determine if the pins have pull-high resistors. PC6 is
shared with the therefore output data pin RFD.
Bidirectional 8-bit input/output port. Each nibble, PD0~PD3 and PD4~PD7,
can be configured as wake-up inputs by configuration options. Software in-
structions determine if the pin is a CMOS output or Schmitt Trigger input.
Configuration options determine if the pins have pull-high resistors.
Bidirectional 4-bit input/output port. All pins, PE0~PE3, can be configured
as wake-up inputs by a configuration option. Software instructions deter-
mine if the pin is a CMOS output or Schmitt Trigger input. Configuration op-
tions determine if the pins have pull-high resistors. PE0 and PE1 are shared
with the Z1 and Z2 pins.
OSC1, OSC2 are connected to an external 6MHz or 27MHz crystal/resona-
tor for the internal system clock.
2
Description
HT82K72E/HT82K72A
February 20, 2008