SH7011 Datasheet, PDF (52/292 Pages) Renesas Technology Corp – CMOS single-chip microprocessors

4.2.2 External Clock Input
Input the external clock to the EXTAL pin and leave the XTAL pin open (figure 4.4.). The
external clock frequency should be the same as that of the system clock (CK).
XTAL
Open
EXTAL
External clock input
Figure 4.4 External Clock Input
4.3 Usage Notes
Note on Board Design: Place the crystal resonator and load capacitors as close as possible to the
EXTAL and XTAL pins. To prevent induction from interfering with correct oscillation, ensure
that other signal lines to not cross the EXTAL and XTAL pin signal lines.
Avoid crossing
signal lines
SH7011
C_L1
XTAL
C_L2
EXTAL
Figure 4.5 Note on Board Design
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