ht82k68e-l Holtek Semiconductor Inc., ht82k68e-l Datasheet - Page 4

• Manufacturer Part Number: ht82k68e-l
• Description: Ht82k68e-l/ht82k68a-l -- Multimedia Keyboard Encoder 8-bit Mcu
• Manufacturer: Holtek Semiconductor Inc.

Note:
Absolute Maximum Ratings
Supply Voltage ..........................V
Input Voltage .............................V
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may
D.C. Characteristics
Rev. 1.10
PE0~PE1
PE2
PE3
PE4
VDD
VSS
RESET
OSC1
OSC2
V
I
I
I
I
V
V
Symbol
Pin Name
DD1
DD2
STB1
STB2
DD
IL1
IH1
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.
*: Software means the HT IDE (Holtek Integrated Development Environment) can be configured by mask
option.
Operating Voltage
Operating Current (Crystal OSC)
Operating Current (RC OSC)
Standby Current (WDT enabled)
Standby Current (WDT Disabled)
Input Low Voltage for I/O Ports
(Schmitt)
Input High Voltage for I/O Ports
(Schmitt)
I/O
I/O
O
O
O
O
I
I
Crystal or
Pull-high
or None
Option
Mask
RC
Parameter
SS
SS
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. I
This pin is a CMOS output structure. The pad can function as LED (NUM) drivers
for the keyboard. I
This pin is a CMOS output structure. The pad can function as LED (CAP) drivers for
the keyboard. I
Positive power supply
Negative power supply, ground
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
clock. In the case of RC operation, OSC2 is the output terminal for the 1/4 system
clock; A 110k resistor is connected to OSC1 to generate a 2 MHZ frequency.
0.3V to V
0
.
3V to V
DD
SS
+6.0V
+0.3V
OL
=18mA at V
V
OL
OL
3V
5V
3V
5V
3V
5V
3V
5V
3V
5V
3V
5V
DD
=18mA at V
=18mA at V
4
Test Conditions
No load, f
No load, f
No load, system HALT
No load, system HALT
Storage Temperature ........................... 50 C to 125 C
Operating Temperature .......................... 25 C to 70 C
Conditions
OL
=3.4V
OL
OL
SYS
SYS
Description
=3.4V
=3.4V
= 6MHz
= 6MHz
HT82K68E-L/HT82K68A-L
0.7V
0.7V
Min.
1.8
0
0
DD
DD
Typ.
0.7
0.5
2
2
0.3V
0.3V
Max.
V
V
5.5
1.5
1.5
15
5
5
8
3
6
DD
DD
April 2, 2008
DD
DD
Ta=25 C
Unit
mA
mA
mA
mA
V
V
V
V
V
A
A
A
A