HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 946

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 20 Clock Pulse Generator
20.3.2
Circuit Configuration: An external clock signal can be input as shown in the examples in figure
20.5. If the XTAL pin is left open, make sure that stray capacitance is no more than 10 pF.
In example (b), make sure that the external clock is held high in standby mode.
External Clock: The external clock signal should have the same frequency as the system clock
(φ).
Table 20.4 and figure 20.6 show the input conditions for the external clock.
Rev.6.00 Sep. 27, 2007 Page 916 of 1268
REJ09B0220-0600
External Clock Input
EXTAL
EXTAL
XTAL
XTAL
Figure 20.5 External Clock Input (Examples)
(b) Complementary clock input at XTAL pin
(a) XTAL pin left open
Open
External clock input
External clock input