SN8P2714X_2715
8-bit micro-controller build-in 12-bit ADC
SONiX TECHNOLOGY CO., LTD
Page 48
V1.4
7
OSCILLATORS
7.1 OVERVIEW
The SN8P2710 highly performs the dual clock micro-controller system. The dual clocks are high-speed clock and
low-speed clock. The high-speed clock frequency is supplied through the external oscillator circuit. The low-speed
clock frequency is supplied through on-chip RC oscillator circuit.
Figure 7-1 System Clock Block Diagram
z
Fosc = Fhosc (External high clock) in normal mode
z
Fosc = Flosc (Internal low RC clock) in slow mode
z
Fosc is system clock, Fcpu is instruction cycle clock
z
Fcpu = Fosc/1 ~ Fosc/8 in normal mode
z
Fcpu = Fosc/4 in slow mode
The system clock is required by the following peripheral modules:
9
Timer ( TC0 / TC1 / Watchdog timer)
9
PWM output (PWM0, PWM1)
9
Buzzer output (TC0OUT, TC1OUT)
9
ADC converter
÷4 or ÷
8 (Noise Filter code option Enable)
÷1 ~ ÷
8 (Noise Filter code option Disable)
÷
4
Fcpu
HXOSC.
XIN
XOUT
STPHX
Fcpu code option
High_Clk code option
LXOSC.
CLKMD
CPUM 0
Fosc
Fosc