HD64F38024HV Datasheet, PDF (131/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 4 Clock Pulse Generators
Notes on Board Design
When generating clock pulses by connecting a crystal or ceramic oscillator, pay careful attention
to the following points.
Avoid running signal lines close to the oscillator circuit, since the oscillator may be adversely
affected by induction currents. (See figure 4.6.)
The board should be designed so that the oscillator and load capacitors are located as close as
possible to pins OSC₁ and OSC₂.
Signal A Signal B
× × ^{To be avoided}
C₁
OSC ₁
OSC ₂
C₂
Figure 4.6 Board Design of Oscillator Circuit
Note:
The circuit parameters above are recommended by the crystal or ceramic oscillator
manufacturer.
The circuit parameters are affected by the crystal or ceramic oscillator and floating
capacitance when designing the board. When using the oscillator, consult with the crystal
or ceramic oscillator manufacturer to determine the circuit parameters.
Rev. 8.00 Mar. 09, 2010 Page 109 of 658
REJ09B0042-0800