HD64336900G Datasheet, PDF (110/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

5.7 Usage Notes
5.7.1 Note on Resonators
Resonator characteristics are closely related to board design and should be carefully evaluated by
the user, referring to the examples shown in this section. Resonator circuit parameters will differ
depending on the resonator element, stray capacitance of the PCB, and other factors. Suitable
values should be determined in consultation with the resonator element manufacturer. Design the
circuit so that the resonator element never receives voltages exceeding its maximum rating.
5.7.2 Notes on Board Design
When using a crystal resonator (ceramic resonator), place the resonator and its load capacitors as
close as possible to pins OSC1 and OSC2. Other signal lines should be routed away from the
oscillator circuit to prevent induction from interfering with correct oscillation (see figure 5.15).
Prohibited
Signal A Signal B
C₁
PC0/OSC1
C₂
PC1/OSC2/CLKOUT
Figure 5.15 Example of Incorrect Board Design
Rev. 1.00, 11/03, page 82 of 376