Preliminary
SYSTEM OSCILLATOR CIRCUITS
SN8P1702A/SN8P1703A
8-bit micro-controller build-in 12-bit ADC
VDD
XIN
20PF
CRYSTAL
MCU
XOUT
VSS
20PF
Figure 7-2. Crystal/Ceramic Oscillator
VDD
R
XIN
MCU
XOUT
C
VSS
Figure 7-3. RC Oscillator
VDD
External Clock Input
XIN
MCU
XOUT
VSS
Figure 7-4. External clock input
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Note1: The VDD and VSS of external oscillator circuit must be from the micro-controller. Don’t connect
them from the neighbor power terminal.
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Note2: The external clock input mode can select RC type oscillator or crystal type oscillator of the code
option and input the external clock into XIN pin.
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Note3: In RC type oscillator code option situation, the external clock’s frequency is divided by 2.
Note4: The power and ground of external oscillator circuit must be connected from the micro-controller’s
VDD and VSS. It is necessary to step up the performance of the whole system.
SONiX TECHNOLOGY CO., LTD
Page 45
Revision 0.5
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