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參數(shù)資料
| 型號： | HT48RB8 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 8-Bit USB Type OTP MCU |
| 中文描述： | 8位微控制器的USB型檢察官辦公室 |
| 文件頁數(shù)： | 18/45頁 |
| 文件大?。?/td> | 281K |
| 代理商： | HT48RB8 |
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HT48RB8
Rev. 1.30
18
February 10, 2003
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.
0 4 0
7 4 7
7 4
4 9
#
0 4 0
0 4 0
#
4 9
!
(
,
!
F
F
, (
!
#
(
(
,
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:Sincelowvoltagehastobemaintainedinitsoriginalstateandexceed1ms,therefore1msdelayentersthe
reset mode.
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