HT49CA0 Просмотр технического описания (PDF) - Holtek Semiconductor
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HT49CA0 Datasheet PDF : 39 Pages
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HT49RA0/HT49CA0
Symbol
Parameter
Test Conditions
VDD
Conditions
ISTB3
VIL1
Standby Current
(*fS=WDT RC OSC)
Input Low Voltage for I/O
Ports, TMR, INT0 and INT1
3V
No load, system HALT
LCD On at HALT, C type
3V
¾
VIH1
Input High Voltage for I/O
Ports, TMR, INT0 and INT1
3V
¾
VIL2
Input Low Voltage (RES)
3V
¾
VIH2
Input High Voltage (RES)
3V
¾
IOL1
I/O Port & REM Sink Current
3V VOL=0.1VDD
IOH1
I/O Port & REM Source Current 3V VOH=0.9VDD
IOL2
LCD Common and Segment
Current
3V VOL=0.1VDD
IOH2
LCD Common and Segment
Current
3V VOH=0.9VDD
RPH
Pull-high Resistance of I/O Ports 3V
¾
VLVR Low Voltage Reset Voltage
¾
¾
VLVD Low Voltage Detector Voltage
¾
¾
VPOR
VDD Start Voltage to Ensure
Power-on Reset
¾
¾
RPOR
VDD Rise Rate to Ensure
Power-on Reset
¾
¾
Min.
¾
0
0.7VDD
0
0.9VDD
4
-5
210
-80
100
2.0
2.2
¾
0.035
Typ.
2
¾
¾
¾
¾
8
-7
420
-160
150
2.1
2.3
¾
¾
Max.
5
0.3VDD
VDD
0.4VDD
VDD
¾
¾
¾
¾
200
2.2
2.4
100
¾
Unit
mA
V
V
V
V
mA
mA
mA
mA
kW
V
V
mV
V/ms
Note:
²*² for the value of VA refer to the LCD driver section.
tSYS=1/fSYS
²*fS² please refer to WDT clock option
A.C. Characteristics
Ta=25°C
Symbol
Parameter
fSYS
System Clock
fRTCOSC RTC Frequency
fTIMER Timer I/P Frequency (TMR)
tWDTOSC Watchdog Oscillator Period
tRES
External Reset Low Pulse Width
tLVR
Low Voltage Width to Reset
tSST
System Start-up Timer Period
tINT
Interrupt Pulse Width
Test Conditions
VDD
Conditions
¾
2.0V~3.6V, 4MHz ± 3%,
Temp.= 0°C ~ 50°C
¾
¾
3V
¾
3V
¾
¾
¾
¾
¾
¾ Wake-up from HALT
¾¾
Min.
¾
¾
0
45
1
0.25
¾
1
Typ. Max.
4000
¾
32768
¾
90
¾
1
1024
¾
¾
4000
180
¾
2
¾
¾
Unit
kHz
Hz
kHz
ms
ms
ms
*tSYS
ms
Note: *tSYS=1/fSYS
Rev. 1.20
4
October 24, 2007
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