HD64F3670 Datasheet, PDF (88/323 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

5.3.2 Notes on Board Design
When using a crystal resonator (ceramic resonator), place the resonator and its load capacitors as
close as possible to the OSC₁ and OSC₂ pins. Other signal lines should be routed away from the
oscillator circuit to prevent induction from interfering with correct oscillation (see figure 5.7).
Avoid
Signal A Signal B
C₁
OSC₁
C₂
OSC₂
Figure 5.7 Example of Incorrect Board Design
Rev. 2.0, 03/02, page 64 of 298