ht82k68a Holtek Semiconductor Inc., ht82k68a Datasheet - Page 15
ht82k68a
Manufacturer Part Number
ht82k68a
Description
Ht82k68a -- Multimedia Keyboard Encoder 8-bit Mask Mcu
Manufacturer
Holtek Semiconductor Inc.
Datasheet
1.HT82K68A.pdf
(39 pages)
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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
tomatically reset the device internally.
The LVR includes the following specifications:
Note:
Rev. 1.70
The low voltage (0.9V~V
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.
LVR
*1: To make sure that the system oscillator has stabilized, the SST provides an extra delay of 1024 system
*2: Since low voltage has to be maintained in its original state and exceed 1ms, therefore 1ms delay enters the
such as changing a battery, the LVR will au-
clock pulses before entering the normal operation.
reset mode.
LVR
) has to remain in their
Low Voltage Reset
15
The relationship between V
Note:
V
tion at 4MHz system clock.
OPR
is the voltage range for proper chip opera-
DD
and V
December 26, 2005
LVR
HT82K68A
is shown below.
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