HD6433937 Datasheet, PDF (100/521 Pages) Hitachi Semiconductor – Hardware Manual

4. 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 (ø_OSC)
45% to 55%
Caution
When a crystal or ceramic oscillator element is connected, circuit constants will differ according
to the oscillator element, installation circuit stray capacitance, and so forth, and so should be
determined in consultation with the crystal or ceramic oscillator element manufacturer.
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