SN8P1600 Datasheet, PDF (41/94 Pages) SONiX Technology Company – 8-Bit Micro-Controller

7 _OSCILLATORS
SN8P1600
8-bit micro-controller
OVERVIEW
The SN8P1600 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.
The external high-speed clock and the internal low-speed clock can be system clock (Fosc). The system clock is
divided by 4 to be the instruction cycle (Fcpu).
Fcpu = Fosc / 4
The system clock is required by the following peripheral modules:
Timer 0 (TC0)
Watchdog timer
CLOCK BLOCK DIAGRAM
XIN
XOUT
HXRC(1:0) is code option
•00= RC
•01 =32 Khz Oscillator
•10 = High Speed Oscillator (>10Mhz)
•11 = Standard Oscillator (4Mhz)
Divided by 2
STPHX HXRC
1 : Disable
0 : Enable
HXOSC.
CPUM0
LXOSC.
OSG
fh
Divided by 2
OSG : Oscillator Safe Guard
1 : Disable -- System Default
fl _{0 : Enable}
CPUM0
HXOSC: External high-speed clock.
LXOSC: Internal low-speed clock.
OSG: Oscillator safe guard.
CLKMD
fosc/4 CPUM0
Divided by 4
fcpu
SONiX TECHNOLOGY CO., LTD
Page 41
Revision 1.94