參數(shù)資料
型號(hào)： HT48R70A-1
廠商： Holtek Semiconductor Inc.
英文描述： I/O Type 8-Bit MCU
中文描述： I / O型8位微控制器
文件頁(yè)數(shù)： 19/40頁(yè)
文件大?。?/td> 273K
代理商： HT48R70A-1
HT48R70A-1/HT48C70-1
Rev. 1.60
19
June 9, 2004
Low Voltage Reset
LVR
The microcontroller provides low voltage reset circuit in
order to monitor the supply voltage of the device. If the
supply voltage of the device is within the range
0.9V~V
LVR
, such as changing a battery, the LVR will au-
tomatically reset the device internally.
The LVR includes the following specifications:
The low voltage (0.9V~V
LVR
) has to remain in their
original state to exceed 1ms. If the low voltage state
does not exceed 1ms, the LVR will ignore it and do not
perform a reset function.
The LVR uses the OR function with the external
RES signal to perform chip reset.
TherelationshipbetweenV
DD
andV
LVR
isshownbelow.
Note:
V
OPR
is the voltage range for proper chip opera-
tion at 4MHz system clock.
3 D 3
4 D
D
D 5
#
3 D 3
3 D 3
#
D 5
!
(
)
!
E
E
) (
!
#
(
(
)
Low Voltage Reset
Note:
*1: To make sure that the system oscillator has stabilized, the SST provides an extra delay of
1024 system clock pulses before entering the normal operation.
*2: Since low voltage has to be maintained in its original state and exceed 1ms, therefore 1ms
delay enters the reset mode.
Options
The following table shows all kinds of options in the microcontroller. All of the options must be defined to ensure proper
system functioning.
No.
Options
1
WDT clock source: WDT oscillator or f
SYS
/4 or RTC oscillator or disable
2
CLRWDT instructions: 1 or 2 instructions
3
Timer/Event Counter 0 clock sources: f
SYS
/4 or RTCOSC
4
Timer/Event Counter 1 clock sources: f
SYS
/4 or RTCOSC
5
PA bit wake-up enable or disable
6
PA CMOS or Schmitt input
7
PA, PB, PC, PD, PE, PF, PG pull-high enable or disable (By port)
8
System oscillator
Ext. RC, Ext. crystal, Int. RC+RTC
9
Int. RC frequency selection 3.2MHz, 1.6MHz, 800kHz or 400kHz
10
LVR enable or disable
相關(guān)PDF資料
PDF描述
HT48C70 8-Bit Microcontroller Series
HT48CA0-2 Remote Type 8-Bit MCU
HT48RA0 Remote Type 8-Bit MCU
HT48RA0-2 Remote Type 8-Bit MCU
HT48CA0 8-BIT MICROCONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HT48R70A-1_07 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:I/O Type 8-Bit MCU
HT48RA0 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:Remote Type 8-Bit MCU
HT48RA0(20DIP-A) 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:8-Bit Microcontroller
HT48RA0(20SOIC-A) 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:8-Bit Microcontroller
HT48RA0(24SOIC-A) 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:8-Bit Microcontroller
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