HD6432345 Datasheet, PDF (623/907 Pages) Hitachi Semiconductor – H8S/2345 F-ZTAT Hardware Manual

Table 18.3 Crystal Resonator Parameters
Frequency (MHz)
R_S max (Ω)
C₀ max (pF)
2
4
8
12
16
20
500
120
80
60
50
40
7
7
7
7
7
7
Note 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 18.4.
When designing the board, place the crystal resonator and its load capacitors as close as possible
to the XTAL and EXTAL pins.
Avoid
C_L2
Signal A Signal B
H8S/2345
XTAL
EXTAL
C_L1
Figure 18.4 Example of Incorrect Board Design
612