HD6473837H Datasheet, PDF (105/562 Pages) Renesas Technology Corp – Hardware Manual

External Clock Input Method: Connect an external clock signal to pin OSC₁, and leave pin
OSC₂ open. Figure 4.6 shows a typical connection.
OSC ₁
OSC ₂
Open
External clock input
Frequency
Duty cycle
Figure 4.6 External Clock Input (Example)
Oscillator Clock (φ_OSC)
45% to 55%
4.3 Subclock Generator
Connecting a 32.768-kHz Crystal Oscillator: Clock pulses can be supplied to the subclock
divider by connecting a 32.768-kHz crystal oscillator, as shown in figure 4.7. Following the same
connection precautions as mentioned in section 4.2.3, Notes on Board Design.
C₁
X₁
X₂
C₂
C₁ = C ₂ = 15 pF (typ.)
Figure 4.7 Typical Connection to 32.768-kHz Crystal Oscillator
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