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CHAPTER 5 CLOCK GENERATOR
Preliminary User’s Manual U16035EJ1V0UM
5.4.2 Subsystem clock oscillator
The subsystem clock oscillator oscillates with a crystal resonator (32.768 kHz TYP.) connected to the XT1 and
XT2 pins.
External clocks can be input to the subsystem clock oscillator. In this case, input a clock signal to the XT1 pin
and an inverted-phase clock signal to the XT2 pin.
Figure 5-5 shows an external circuit of the subsystem clock oscillator.
Figure 5-5. External Circuit of Subsystem Clock Oscillator
(a) Crystal oscillation
(b) External clock
XT2
IC
XT1
32.768
kHz
XT1
XT2
PD74HCU04
External
clock
µ
V
SS1
Cautions are listed on the next page.
