HD6473032F Datasheet, PDF (423/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

15.2.2 External Clock Input
Circuit Configuration: An external clock signal can be input as shown in the examples in
figure 15-5. In example b, the clock should be held high in standby mode.
If the XTAL pin is left open, the stray capacitance should not exceed 10 pF.
EXTAL
XTAL
Open
a. XTAL pin left open
External clock input
EXTAL
XTAL
74HC04
External clock input
b. Complementary clock input at XTAL pin
Figure 15-5 External Clock Input (Examples)
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