Holtek HT49RU80 Manual page 6

Symbol Parameter
Input Low Voltage for I/O Ports,
V
TMR0, TMR1, TMR2, INT0 and
IL1
INT1
Input High Voltage for I/O Ports,
V
TMR0, TMR1, TMR2, INT0 and
IH1
INT1
V Input Low Voltage (RES)
IL2
V
Input High Voltage (RES)
IH2
I
I/O Port Sink Current
OL1
I
I/O Port Source Current
OH1
LCD Common and Segment
I
OL2
Current
LCD Common and Segment
I
OH2
Current
R
Pull-high Resistance
PH
V Low Voltage Reset Voltage
LVR
V
Low Voltage Detector Voltage
LVD
²*² for the value of VA refer to the LCD driver section.
Note:
²*f ² please refer to the WDT clock option
S
A.C. Characteristics
Symbol Parameter
System Clock
f
SYS1
(Crystal OSC, RC OSC)
System Clock
f
SYS2
(32768Hz Crystal OSC)
f RTC Frequency
RTCOSC
Timer I/P Frequency
f
TIMER
(50% duty)
t
Watchdog Oscillator Period
WDTOSC
t
External Reset Low Pulse Width
RES
t
System Start-up Timer Period
SST
t
Low Voltage Width to Reset
LVR
t Interrupt Pulse Width
INT
Note: *t = 1/f or 1/f
SYS SYS1 SYS2
Rev. 1.10
Test Conditions
V Conditions
DD
¾ ¾
¾ ¾
¾ ¾
¾ ¾
3V
V =0.1V
OL DD
5V
3V
V =0.9V
OH DD
5V
3V
V =0.1V
OL A
5V
3V
V =0.9V
OH A
5V
3V
¾
5V
¾ ¾
¾ ¾
Test Conditions
V Conditions
DD
¾
2.2V~5.5V
¾
3.3V~5.5V
¾ ¾
¾ ¾
¾
2.2V~5.5V
¾
3.3V~5.5V
¾
3V
¾
5V
¾ ¾
¾
Wake-up from HALT
¾ ¾
¾ ¾
6
HT49RU80/HT49CU80
Min. Typ. Max. Unit
¾
0.3V
0
DD
¾
0.7V V
DD DD
¾
0 0.4V
DD
¾
0.9V V
DD DD
¾
6 12
¾
10 25
-2 ¾
-4
-5 -8 ¾
¾
210 420
¾
350 700
-80 -160 ¾
-180 -360 ¾
20 60 100
10 30 50
2.7 3.0 3.3
3.0 3.3 3.6
Ta=25°C
Min. Typ. Max. Unit
¾
400 4000 kHz
¾
400 8000 kHz
¾ ¾
32768
¾ ¾
32768
¾
0 4000 kHz
¾
0 8000 kHz
45 90 180
32 65 130
¾ ¾
1
¾ ¾
*t
1024
0.25 1 2
¾ ¾
1
March 2, 2007
V
V
V
V
mA
mA
mA
mA
mA
mA
mA
mA
kW
kW
V
V
Hz
Hz
ms
ms
ms
SYS
ms
ms