HD64F3039F18 Datasheet, PDF (525/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

16.2.2 External Clock Input
Section 16 Clock Pulse Generator
Circuit Configuration
An external clock signal can be input as shown in the examples in figure 16.5. 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 16.5 External Clock Input (Examples)
Rev.3.00 Mar. 26, 2007 Page 501 of 682
REJ09B0353-0300