ht82k68e-l Holtek Semiconductor Inc., ht82k68e-l Datasheet - Page 5

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

A.C. Characteristics
Note:
Rev. 1.10
V
V
V
I
I
I
t
R
R
f
f
t
t
t
t
t
t
Symbol
Symbol
OL
OH
LED
POR
SYS1
SYS2
WDTOSC
WDT1
WDT2
RES
SST
INT
f/f
f/f1
IL2
IH2
LVR
PH
PH1
t
SYS
Input Low Voltage (RESET)
Input High Voltage (RESET)
Low Voltage Reset
I/O Port Sink Current of PA, PB, PC,
PD, PE0~1
I/O Port Source Current of PA, PB,
PC, PD, PE0~4
LED Sink Current (SCR, NUM, CAP)
Power-on Reset Time
Internal Pull-high Resistance of PA,
PB, PC, PD, PE Port
Internal Pull-high Resistance of DATA,
CLK
Frequency Variation
Frequency Variation
System Clock (Crystal OSC)
System Clock (RC OSC)
Watchdog Oscillator Period
Watchdog Time-out Period (RC)
Watchdog Time-out Period
(System Clock)
External Reset Low Pulse Width
System Start-up Timer Period
Interrupt Pulse Width
= 1/f
SYS1
or 1/f
Parameter
Parameter
SYS2
1.8V
V
V
3V
5V
3V
5V
5V
5V
5V
5V
3V
5V
3V
5V
5V
5V
5V
3V
5V
3V
5V
3V
5V
DD
DD
5
Test Conditions
Test Conditions
V
V
V
R=100k , C=0.1 F
Crystal
RC
OSC resistor 40k
OSC resistor 40k
Without WDT
prescaler
Without WDT
prescaler
Power-up or
wake-up from HALT
OL
OH
OL
= 0.1V
=3.4V
= 0.9V
Conditions
Conditions
DD
DD
HT82K68E-L/HT82K68A-L
0.9V
0.9V
Min.
Min.
4.8
4.8
10
50
30
15
45
35
12
2.5
0
0
2
4
2
9
1
1
DD
DD
1024
1024
Typ.
Typ.
100
2.0
4.7
17
60
30
90
78
23
19
4
9
4
6
6
6
4
Max.
Max.
V
V
150
180
130
0.7
1.3
7.2
7.2
25
90
45
15
45
35
8
20
DD
DD
1
April 2, 2008
Ta=25 C
MHz
MHz
MHz
MHz
Unit
Unit
t
t
mA
mA
mA
ms
ms
ms
k
k
k
k
SYS
SYS
%
%
V
V
V
V
V
s
s
s
s