SN8P1602AS datasheet(40/94 Pages) SONIX

40 / 94 page

SN8P1600

8-bit micro-controller

SONiX TECHNOLOGY CO., LTD

Page 40

Revision 1.94

In power-fail condition as Brown-out reset. The reset pin may keep high level but the VDD is low voltage. That makes

the system reset fail and chip error. To connect a diode from reset pin to VDD is a good solution. This circuit can force

the capacitor to release electrical charge and drop the voltage, and solve the error.

GND

VCC

RST

VDD

MCU

VSS

20K ohm

0.1uF

DIODE

LOW VOLTAGE DETECTOR (LVD) DESCRIPTION

The LVD is a low voltage detector. It detects VDD level and reset the system as the VDD lower than the desired

voltage. The detect level is 2.4V. If the VDD lower than 2.4V, the system resets. The LVD function is controlled by code

option. Users can turn on it for special application like power-fail condition. LVD work with external reset function. They

are OR active.

System Reset

LVD Detect Level

End of LVD Reset

VDD

LVD

The LVD can protect system to work well under Brown-out reset, but it is a high consumptive circuit. In 3V condition,

the LVD consumes about 100uA. It is a very large consumption for battery system, but supports AC system well.

Note: LVD is enabled by code option.

SN8P1602AS 데이터시트(PDF) 40 Page - SONiX Technology Company