SN8P1602B
8-Bit Micro-Controller
7OSCILLATORS
OVERVIEW
The SN8P1602B is a dual clock micro-controller system. There are external high-speed clock and internal low-speed
clock. The high-speed clock is generated from the external oscillator circuit. The low-speed clock is generated from
on-chip RC oscillator circuit.
Both 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
CLOCK BLOCK DIAGRAM
HXRC(1:0) is code option
•00= RC
•01 =32 Khz Oscillator
•10 = High Speed Oscillator (>10Mhz)
Divided by 2
1 : Disable
0 : Enable
•11 = Standard Oscillator (4Mhz)
STPHX HXRC
CLKMD
fosc/4
CPUM0
XIN
HXOSC.
OSG
Divided by 2
fcpu
Divided by 4
XOUT
fh
fl
OSG : Oscillator Safe Guard
1 : Disable -- System Default
0 : Enable
CPUM0
LXOSC.
CPUM0
ꢀ
ꢀ
ꢀ
HXOSC: External high-speed clock
LXOSC: Internal low-speed clock
OSG: Oscillator safe guard
SONiX TECHNOLOGY CO., LTD
Page 38
Version 1.1
SONIX [ SONIX TECHNOLOGY COMPANY ]
