HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 624

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

18.3.2
Circuit Configuration: An external clock signal can be input as shown in the examples in figure
18.5. 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
(ø).
Table 18.4 and figure 18.6 show the input conditions for the external clock.
External Clock Input
EXTAL
EXTAL
XTAL
XTAL
Figure 18.5 External Clock Input (Examples)
(b) Complementary clock input at XTAL pin
(a) XTAL pin left open
Open
External clock input
External clock input
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