HD6417751 Datasheet, PDF (300/1105 Pages) Renesas Technology Corp – SuperH RISC engine

10.10 Notes on Board Design
When Using a Crystal Resonator: Place the crystal resonator and capacitors close to the EXTAL
and XTAL pins. To prevent induction from interfering with correct oscillation, ensure that no
other signal lines cross the signal lines for these pins.
CL1
CL2
Avoid crossing signal lines
R
EXTAL XTAL
SH7751 Series
Recommended values
CL1 = CL2 = 0–33 pF
R = 0Ω
Note: The values for CL1, CL2, and the damping resistance should be determined after
consultation with the crystal resonator manufacturer.
Figure 10.4 Points for Attention when Using Crystal Resonator
When Inputting External Clock from EXTAL Pin: Make no connection to the XTAL pin.
Rev. 3.0, 04/02, page 260 of 1064