ST49C101A-XX
C1
0.01uF
AVCC DVCC
C2
0.01uF
AGND
Parallel Cut
Fundamental
Resonance
20-30pF Load
Y1
Crystal
DVCC
U1
76
1
AVCC DVCC
XTAL1
ST49C101A-XX
8
XTAL2
CLOCK 5
2
OE
AGND DGND
DGND
CLOCK= Xtal Freq. x Option
34
AGND
DGND
Figure 2. High Frequency Crystal Oscillator Using a Crystal for Reference.
AVCC DVCC
C1
0.01uF
AGND
CLKin
U1
76
1
AVCC DVCC
XTAL1
C2
0.01uF
DGND
DVCC
ST49C101A-XX
8
5
XTAL2 CLOCK
2 OE
AGND DGND
CLOCK = CLKin x Option
34
AGND
DGND
Figure 3. High Frequency Clock Rate Multiplication Using External Clock.
Rev. 2.20
5