Datasheet

Section 24 Clock Pulse Generator
Rev. 4.00 Sep 27, 2006 page 735 of 1130
REJ09B0327-0400
Table 24.3 Crystal Resonator Parameters
Frequency (MHz) 2 4 8 10 12 16 20
R
S
max (Ω
ΩΩ
Ω) 500 120 80 70 60 50 40
C
0
max (pF) 7777777
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 24.4.
When designing the board, place the crystal resonator and its load capacitors as close as possible
to the XTAL and EXTAL pins.
C
L2
Signal A Signal B
C
L1
This LSI
XTAL
EXTAL
Avoid
Figure 24.4 Example of Incorrect Board Design