ht82k74e Holtek Semiconductor Inc., ht82k74e Datasheet - Page 3

• Manufacturer Part Number: ht82k74e
• Description: 27mhz Keyboard/ Mouse Tx 8-bit Mcu
• Manufacturer: Holtek Semiconductor Inc.

Pin Description
Absolute Maximum Ratings
Supply Voltage ...........................V
Input Voltage..............................V
I
Total Power Dissipation .....................................500mW
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may
Rev. 1.00
OL
PA0~PA1
PA2/TMR
PA3~PA7
PB0~PB7
PC0~PC7
PD0/VA
PD1/VB
PD2/ZA
PD3/ZB
PD4~PD7
PE0~PE3
OSC1
OSC2
VSS
RES
VDD
BAT_IN
LX
VSSLX
RF_OUT
Pin Name
Total ..............................................................150mA
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 exposure to extreme conditions may affect device reliability.
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I
I
I
Full Power/
Half Power
Wake-up
Wake-up
Wake-up
Wake-up
Wake-up
Pull-high
Pull-high
Pull-high
Pull-high
Pull-high
Options
SS
SS
0.3V to V
0.3V to V
Bidirectional 8-bit input/output port. Each pin can be configured as a wake-up
input (both falling and rising edge) by a configuration option. Software instruc-
tions determine if the pin is a CMOS output or Schmitt Trigger input. Configura-
tion options determine 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,
pins can be configured as wake-up inputs (both falling and rising edge) by con-
figuration 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,
pins can be configured as wake-up inputs (both falling and rising edge) by con-
figuration 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, PD0~PD3 and PD4~PD7,
pins can be configured as wake-up inputs (both falling and rising edge) by con-
figuration 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. PD0 and PD1 are shared with the VA and VB pins. PD2 and
PD3 are shared with the ZA and ZB pins.
Bidirectional 4-bit input/output port. PE0~PE3 pin can be configured as
wake-up inputs (both falling and rising edge) by a configuration option. Soft-
ware instructions determine if the pin is a CMOS output or Schmitt Trigger in-
put. Configuration options determine if the pins have pull-high resistors. For
HT82K74EE PE0 and PE1 are shared with the SDA and SCL lines respec-
tively and not bonded to external pins.
OSC1, OSC2 are connected to an external 27MHz crystal/ resonator for the in-
ternal system clock.
Negative power supply, ground
Schmitt trigger reset input. Active low
Positive power supply
Battery input
DC/DC LX switch
DC/DC ground
RF power amplifier output pin
DD
SS
+6.0V
+0.3V
3
Storage Temperature ............................ 50 C to 125 C
Operating Temperature........................... 40 C to 85 C
I
OH
Total............................................................ 100mA
Description
HT82K74E/HT82K74EE
December 15, 2009