HT48RA3(2007) 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT48RA3 Datasheet PDF : 38 Pages
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HT48RA3/HT48CA3
A.C. Characteristics
Symbol
Parameter
fSYS1
System Clock
(Crystal OSC)
Test Conditions
VDD
Conditions
¾ 2.0V~5.5V
¾ 3.3V~5.5V
fSYS2
System Clock
(RC OSC)
¾ 2.0V~5.5V
¾ 3.3V~5.5V
fTIMER
Timer I/P Frequency
(TMR0/TMR1)
3V
50% duty
5V
3V
tWDTOSC Watchdog Oscillator Period
¾
5V
tWDT1
Watchdog Time-out Period
(WDT OSC)
3V
Without WDT prescaler
5V
tWDT2
tRES
tSST
Watchdog Time-out Period (fSYS/4) ¾ Without WDT prescaler
External Reset Low Pulse Width
¾
¾
System Start-up Timer Period
¾
Power-up reset or
wake-up from HALT
tLVR
Low Voltage Width to Reset
¾
¾
tINT
Interrupt Pulse Width
¾
¾
tACC
Data ROM Access Time
¾
¾
Note: tSYS=1/(fSYS)
Min.
400
400
400
400
0
0
45
32
11
8
¾
1
¾
1
1
1
Typ.
¾
¾
¾
¾
¾
¾
90
65
23
17
1024
¾
1024
¾
¾
¾
Ta=25°C
Max. Unit
4000 kHz
8000 kHz
4000 kHz
8000 kHz
4000 kHz
8000 kHz
180
ms
130
ms
46
ms
33
ms
¾
tSYS
¾
ms
¾
tSYS
¾
ms
¾
ms
¾
ms
Rev. 1.30
5
October 12, 2007
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