HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 645

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

19.2.2 External Clock Input
Circuit Configuration: An external clock signal can be input as shown in the examples in figure
19-5. If the XTAL pin is left open, the stray capacitance should not exceed 10 pF. If the stray
capacitance at the XTAL pin exceeds 10 pF in configuration a, use configuration b instead and
hold the clock high in standby mode.
EXTAL
XTAL
EXTAL
XTAL
Figure 19-5 External Clock Input (Examples)
b. Complementary clock input at XTAL pin
a. XTAL pin left open
74HC04
636
Open
External clock input
External clock input