SN8P2613 datasheet(40/102 Pages) SONIX

40 / 102 page

SN8P2610 Series

8-Bit Micro-Controller

SONiX TECHNOLOGY CO., LTD

Page 40

Version 1.3

3.4.2 THE SYSTEM OPERATING VOLTAGE DECSRIPTION

To improve the brown out reset needs to know the system minimum operating voltage which is depend on the system

executing rate and power level. Different system executing rates have different system minimum operating voltage.

The electrical characteristic section shows the system voltage to executing rate relationship.

Vdd (V)

System Rate (Fcpu)

System Mini.

Operating Voltage.

System Reset

Voltage.

Dead-Band Area

Normal Operating

Area

Reset Area

Normally the system operation voltage area is higher than the system reset voltage to VDD, and the reset voltage is

decided by LVD detect level. The system minimum operating voltage rises when the system executing rate upper even

higher than system reset voltage. The dead-band definition is the system minimum operating voltage above the system

reset voltage.

3.4.3 BROWN OUT RESET IMPROVEMENT

How to improve the brown reset condition?

There are some methods to improve brown out reset as following.

LVD reset

Watchdog reset

Reduce the system executing rate

External reset circuit. (Zener diode reset circuit, Voltage bias reset circuit, External reset IC)

Note:

1. The “ Zener diode reset circuit”, “Voltage bias reset circuit” and “External reset IC” can

completely improve the brown out reset, DC low battery and AC slow power down conditions.

2. For AC power application and enhance EFT performance, the system clock is 4MHz/4 (1 mips)

and use external reset (“ Zener diode reset circuit”, “Voltage bias reset circuit”, “External reset

IC”). The structure can improve noise effective and get good EFT characteristic.

SN8P2613 Datasheet(PDF) 40 Page - SONiX Technology Company