SN8P275X Series
8-bit micro-controller build-in 12-bit ADC
SONiX TECHNOLOGY CO., LTD
Page 24
Version 0.7
2.1.2 CODE OPTION TABLE
Code Option
Content
Function Description
RC
Low cost RC for external high clock oscillator and XOUT becomes to
Fcpu frequency output pin.
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.
IHRC_16M
High speed internal 16MHz RC. XIN/XOUT become to P3.2/P3.1
bi-direction I/O pins.
IHRC_RTC
High speed internal 16MHz RC with 0.5sec RTC. XIN/XOUT become to
P3.2/P3.1 bit-direction I/O pins.
High_Clk
32K X’tal
Low frequency, power saving crystal (e.g. 32.768KHz) for external high
clock oscillator.
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.
Watchdog is running in green mode.
Watch_Dog
Disable Disable
Watchdog
function.
Fhosc/1
Instruction cycle is oscillator clock.
Notice: In Fosc/1, Noise Filter must be disabled.
Fhosc/2
Instruction cycle is 2 oscillator clocks.
Notice: In Fosc/1, Noise Filter must be disabled.
Fhosc/4
Instruction cycle is 4 oscillator clocks.
Fhosc/8
Instruction cycle is 8 oscillator clocks.
Fhosc/16
Instruction cycle is 16 oscillator clocks.
Fhosc/32
Instruction cycle is 32 oscillator clocks.
Fhosc/64
Instruction cycle is 64 oscillator clocks.
Fcpu
Fhosc/128 Instruction cycle is 128 oscillator clocks.
Enable
Enable ROM code Security function.
Security
Disable
Disable ROM code Security function.
Enable Enable
Noise
Filter.
Noise_Filter
Disable Disable
Noise
Filter.
P3.3
Enable P3.3 input only without pull-up resister.
Reset_Pin
Reset
Enable External reset PIN.
No Disable
External reset de-bounce time.
External Reset
Length
128 * ILRC
Enable
External reset de-bounce time.
Note:
1.
In high noisy environment, enable “Noise Filter” and set Watch_Dog as “Always_On”
is strongly recommended.
2.
Fcpu code option is only available for High Clock. Fcpu of slow mode is Flosc/4.
3.
In external RC mode, the Noise_Filter is enabled by assembler.
4.
If watchdog enable, watchdog timer is still counting in green mode.