Datasheet

Section 23 Clock Pulse Generator
Rev. 6.00 Mar. 18, 2010 Page 782 of 982
REJ09B0054-0600
23.9.2 Note on Board Design
When designing the board, place the crystal resonator and its load capacitors as close as possible
to the EXTAL, XTAL, OSC1, and OSC2 pins. Make wires as short as possible. Other signal lines
should be routed away from the oscillator circuit, as shown in figure 23.11. This is to prevent
induction from interfering with correct oscillation.
C2
Avoid
Signal A Signal B
C1
This LSI
EXTAL, OSC1
XTAL, OSC2
Figure 23.11 Note on Board Design of Oscillator Circuit