HT82K68E-28 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT82K68E-28 Datasheet PDF : 39 Pages
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HT82K68E
Pin Name I/O
Mask
Option
Description
PE0~PE1 I/O
PE2
O
PE3
O
PE4
O
VDD
¾
Pull-high
or None
¾
Bidirectional input/output port. Software* instruction determine the CMOS output
or Schmitt Trigger input with or without pull-high resistor.
If PE0 output 1, rising edge of PC2 trigger INT circuit.
PE0 output 0, falling edge of PC2 trigger INT circuit.
This pin is a CMOS output structure. The pad can function as LED (SCR) drivers
for the keyboard. IOL=18mA at VOL=3.4V
This pin is a CMOS output structure. The pad can function as LED (NUM) drivers
for the keyboard. IOL=18mA at VOL=3.4V
This pin is a CMOS output structure. The pad can function as LED (CAP) drivers for
the keyboard. IOL=18mA at VOL=3.4V
Positive power supply
VSS
RESET
OSC1
OSC2
¾
¾
Negative power supply, ground
I
¾
Chip reset input. Active low. Built-in power-on reset circuit to reset 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
I
O
Crystal or RC clock. In the case of RC operation, OSC2 is the output terminal for the 1/4 system
clock; A 110kW resistor is connected to OSC1 to generate a 2 MHZ frequency.
Note: *: Software means the HT-IDE (Holtek Integrated Development Environment) can be configured by mask op-
tion.
Absolute Maximum Ratings
Supply Voltage ..........................VSS-0.3V to VSS+6.0V
Input Voltage .............................VSS-0.3V to VDD+0.3V
Storage Temperature ...........................-50°C to 125°C
Operating Temperature ..........................-25°C to 70°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum 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 exposure to extreme conditions may affect device reliabil-
ity.
D.C. Characteristics
Symbol
Parameter
VDD
Operating Voltage
IDD1
Operating Current (Crystal OSC)
IDD2
Operating Current (RC OSC)
ISTB1
Standby Current (WDT enabled)
ISTB2
Standby Current (WDT Disabled)
VIL1
Input Low Voltage for I/O Ports
(Schmitt)
VIH1
Input High Voltage for I/O Ports
(Schmitt)
Test Conditions
VDD
Conditions
¾
¾
3V
No load, fSYS= 6MHz
5V
3V
No load, fSYS= 6MHz
5V
3V
No load, system HALT
5V
3V
No load, system HALT
5V
3V
¾
5V
¾
3V
¾
5V
¾
Ta=25°C
Min. Typ. Max. Unit
2.2 ¾ 5.5 V
¾ 0.7 1.5 mA
¾
2
5 mA
¾ 0.5 1.5 mA
¾
2
5 mA
¾
¾
8
mA
¾
¾
15 mA
¾
¾
3
mA
¾
¾
6
mA
0
¾ 0.9 V
0
¾ 1.5 V
2.1 ¾
3
V
3.5 ¾
5
V
Rev. 2.00
4
July 10, 2007
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