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零件编号
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HT48RA3(2007) 查看數據表(PDF) - Holtek Semiconductor
零件编号
产品描述 (功能)
生产厂家
HT48RA3
(Rev.:2007)
Remote Type 8-Bit MCU
Holtek Semiconductor
HT48RA3 Datasheet PDF : 38 Pages
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HT48RA3/HT48CA3
A.C. Characteristics
Symbol
Parameter
f
SYS1
System Clock
(Crystal OSC)
Test Conditions
V
DD
Conditions
¾
2.0V~5.5V
¾
3.3V~5.5V
f
SYS2
System Clock
(RC OSC)
¾
2.0V~5.5V
¾
3.3V~5.5V
f
TIMER
Timer I/P Frequency
(TMR0/TMR1)
3V
50% duty
5V
3V
t
WDTOSC
Watchdog Oscillator Period
¾
5V
t
WDT1
Watchdog Time-out Period
(WDT OSC)
3V
Without WDT prescaler
5V
t
WDT2
t
RES
t
SST
Watchdog Time-out Period (f
SYS
/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
t
LVR
Low Voltage Width to Reset
¾
¾
t
INT
Interrupt Pulse Width
¾
¾
t
ACC
Data ROM Access Time
¾
¾
Note: t
SYS
=1/(f
SYS
)
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
m
s
130
m
s
46
ms
33
ms
¾
t
SYS
¾
m
s
¾
t
SYS
¾
ms
¾
m
s
¾
m
s
Rev. 1.30
5
October 12, 2007
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