參數(shù)資料
型號: HT48CA1
廠商: Holtek Semiconductor Inc.
英文描述: Remote Type 8-Bit MCU
中文描述: 遠程型8位微控制器
文件頁數(shù): 5/39頁
文件大?。?/td> 308K
代理商: HT48CA1
A.C. Characteristics
Ta=25 C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
f
SYS1
System Clock (Crystal OSC)
2.0V~5.5V
400
4000
kHz
3.3V~5.5V
400
8000
kHz
f
SYS2
System Clock (RC OSC)
2.0V~5.5V
400
4000
kHz
3.3V~5.5V
400
8000
kHz
f
TIMER
Timer I/P Frequency (TMR0/TMR1)
3V
50% duty
0
4000
kHz
5V
0
8000
kHz
t
WDTOSC
Watchdog Oscillator Period
3V
45
90
180
s
5V
32
65
130
s
t
WDT1
Watchdog Time-out Period
(WDT OSC)
3V
Without WDT prescaler
11
23
46
ms
5V
8
17
33
ms
t
WDT2
Watchdog Time-out Period (f
SYS
/4)
Without WDT prescaler
1024
t
SYS
t
RES
External Reset Low Pulse Width
1
s
t
SST
System Start-up Timer Period
Power-up reset or
wake-up from HALT
1024
t
SYS
t
LVR
Low Voltage Width to Reset
1
ms
t
INT
Interrupt Pulse Width
1
s
t
ACC
Data ROM Access Time
1
s
Note: t
SYS
=1/(f
SYS
)
HT48RA1/HT48CA1
Rev. 1.00
5
June 25, 2004
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