HT46RB50 Holtek Semiconductor, HT46RB50 Datasheet - Page 22

• Manufacturer Part Number: HT46RB50
• Description: A/D Type USB 8-Bit MCU
• Manufacturer: Holtek Semiconductor

EXIT_INT_ISR:
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. 1.10
The low voltage range (0.9V~V
tained for over 1ms, otherwise, 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 a chip reset.
mov
mov
mov
reti
LVR
*1: To make sure that the system oscillator has stabilized, the SST provides an extra delay of 1024 system
*2: Low voltage state has to be maintained in its original state for over 1ms, then after 1ms delay,
, such as changing a battery, the LVR will au-
clock pulses before resuming normal operation.
the device enters the reset mode.
a,status_stack
STATUS,a
a,acc_stack
LVR
; restore STATUS from user defined memory
; restore ACC from user defined memory
) has to be main-
Low Voltage Reset
22
The relationship between V
Note: V
operation at 4MHz system clock.
OPR
is the voltage range for proper chip
DD
and V
LVR
September 7, 2006
HT46RB50
is shown below.