HD643303x Hitachi, HD643303x Datasheet - Page 423

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

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
EXTAL
XTAL
b. Complementary clock input at XTAL pin
Figure 15-5 External Clock Input (Examples)
a. XTAL pin left open
74HC04
Open
408
External clock input
External clock input