HD6473032F Datasheet, PDF (422/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

Table 15-2 Crystal Resonator Parameters
Frequency (MHz)
Rs max (Ω)
Co (pF)
2
4
8
10
12
16
500
120
80
70
60
50
7 pF max
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
Signal A
Signal B
H8/3032 Series
XTAL
EXTAL
C _L1
Figure 15-4 Example of Incorrect Board Design
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