Subclock Oscillator - Renesas H8S/2633 Series Hardware Manual

23A.7 Subclock Oscillator
(1) Connecting 32.768kHz Quartz Resonator
To supply a clock to the subclock oscillator, connect a 32.768kHz quartz resonator, as shown in
figure 23A-8. See section 23A.3.1, Notes on Board Design for notes on connecting crystal
resonators.
Figure 23A-8 Example Connection of 32.768kHz Crystal Resonator
Figure 23A-9 shows the equivalence circuit for a 32.768kHz resonator.
OSC1
Figure 23A-9 Equivalence Circuit for 32.768kHz Resonator
968
OSC1
OSC2
L C
s s
C
C
1
C
2
C
R
s
o
C
o
R
s
f =32.768kHz
w
Type No.: MX38T (Nihon Dempa Kogyo)
=C =15pF (typ)
1 2
OSC2
=1.5pF (typ.)
=14kΩ (typ.)