SN8P1600
8-bit micro-controller
7OSCILLATORS
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:
ꢄ
ꢄ
Timer 0 (TC0)
Watchdog timer
CLOCK BLOCK DIAGRAM
HXRC(1:0) is code option
•00= RC
•01 =32 Khz Oscillator
•10 = High Speed Oscillator (>10Mhz)
•11 = Standard Oscillator (4Mhz)
Divided by 2
1 : Disable
0 : Enable
STPHX HXRC
CLKMD
fosc/4
CPUM0
XIN
XOUT
HXOSC.
OSG
Divided by 2
fcpu
Divided by 4
fh
fl
OSG : Oscillator Safe Guard
1 : Disable -- System Default
0 : Enable
CPUM0
LXOSC.
CPUM0
ꢂ
ꢂ
ꢂ
HXOSC: External high-speed clock.
LXOSC: Internal low-speed clock.
OSG: Oscillator safe guard.
SONiX TECHNOLOGY CO., LTD
Page 41
Revision 1.94
SONIX [ SONIX TECHNOLOGY COMPANY ]
