D12320VF25V Datasheet, PDF (832/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 18 Clock Pulse Generator
18.3.2 External Clock Input
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.
EXTAL
XTAL
Open
External clock input
(a) XTAL pin left open
EXTAL
XTAL
External clock input
(b) Complementary clock input at XTAL pin
Figure 18.5 External Clock Input (Examples)
Rev.7.00 Feb. 14, 2007 page 798 of 1108
REJ09B0089-0700