SN8F27E64KB datasheet(42/192 Pages) SONIX

42 / 192 page

SN8F27E60 Series

8-Bit Flash Micro-Controller with Embedded ICE and ISP

SONiX TECHNOLOGY CO., LTD

Page 42

Version 1.4

2.5 CODE OPTION TABLE

The code option is the system hardware configurations including oscillator type, noise filter option, watchdog timer

operation, LVD option, reset pin option and Flash ROM security control. The code option items are as following table:

Code Option

Content

Function Description

High_Clk

IHRC_16M

High speed internal 16MHz RC. XIN/XOUT pins are bi-direction GPIO

mode.

IHRC_RTC

High speed internal 16MHz RC. XIN/XOUT pins are connected to

external 32768Hz crystal.

Low cost RC for external high clock oscillator. XIN pin is connected to RC

oscillator. XOUT pin is bi-direction GPIO mode.

32K X’tal

Low frequency, power saving crystal (e.g. 32.768KHz) for external high

clock oscillator.

12M X’tal

High speed crystal /resonator (e.g. 12MHz) for external high clock

oscillator.

4M X’tal

Standard crystal /resonator (e.g. 4M) for external high clock oscillator.

High_Fcpu

Fhosc/1

Normal mode instruction cycle is 1 high speed oscillator clocks.

Fhosc/2

Normal mode instruction cycle is 2 high speed oscillator clocks.

Fhosc/4

Normal mode instruction cycle is 4 high speed oscillator clocks.

Fhosc/8

Normal mode instruction cycle is 8 high speed oscillator clocks.

Fhosc/16

Normal mode instruction cycle is 16 high speed oscillator clocks.

Fhosc/32

Normal mode instruction cycle is 32 high speed oscillator clocks.

Fhosc/64

Normal mode instruction cycle is 64 high speed oscillator clocks.

Fhosc/128

Normal mode instruction cycle is 128 high speed oscillator clocks.

Low_Fcpu

Flosc/1

Slow mode instruction cycle is 1 low speed oscillator clocks.

Flosc/2

Slow mode instruction cycle is 2 low speed oscillator clocks.

Flosc/4

Slow mode instruction cycle is 4 low speed oscillator clocks.

Flosc/8

Slow mode instruction cycle is 8 low speed oscillator clocks.

Noise_Filter

Enable

Enable Noise Filter.

Disable

Disable Noise Filter.

WDT_CLK

Flosc/4

Watchdog timer clock source Flosc/4.

Flosc/8

Watchdog timer clock source Flosc/8.

Flosc/16

Watchdog timer clock source Flosc/16.

Flosc/32

Watchdog timer clock source Flosc/32.

Watch_Dog

Always_On

Watchdog timer is always on enable even in power down and green

mode.

Enable

Enable watchdog timer. Watchdog timer stops in power down mode and

green mode.

Disable

Disable Watchdog function.

Reset_Pin

Reset

Enable External reset pin.

P04

Enable P0.4.

Security

Enable

Enable ROM code Security function.

Disable

Disable ROM code Security function.

LVD

LVD_L

LVD will reset chip if VDD is below 1.8V

LVD_M

LVD will reset chip if VDD is below 1.8V

Enable LVD24 bit of PFLAG register for 2.4V low voltage indicator.

LVD_H

LVD will reset chip if VDD is below 2.4V

Enable LVD33 bit of PFLAG register for 3.3V low voltage indicator.

LVD_MAX

LVD will reset chip if VDD is below 3.3V

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