Hitachi H8/3032 Series Hardware Manual page 422

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Table 15-2 Crystal Resonator Parameters
Frequency (MHz) 2
Rs max (Ω) 500
Co (pF)
Use a crystal resonator with a frequency equal to the system clock frequency (ø).
Notes on Board Design: When a crystal resonator is connected, the following points should be
noted:
Other signal lines should be routed away from the oscillator circuit to prevent induction from
interfering with correct oscillation. See figure 15-4.
When the board is designed, the crystal resonator and its load capacitors should be placed as close
as possible to the XTAL and EXTAL pins.
Avoid
C
L2
C
L1
Figure 15-4 Example of Incorrect Board Design
4 8 10
120 80 70
7 pF max
Signal A Signal B
XTAL
EXTAL
407
12 16
60 50
H8/3032 Series