R5F61525 RENESAS [Renesas Technology Corp], R5F61525 Datasheet - Page 706

• Manufacturer Part Number: R5F61525
• Description: 32-Bit CISC Microcomputer H8SX Family H8SX/1500 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 18 Clock Pulse Generator
18.5.2
Since various characteristics related to the resonator are closely linked to the user's board design,
thorough evaluation is necessary on the user's part, using the resonator connection examples
shown in this section as a reference. As the parameters for the resonator will depend on the
floating capacitance of the resonator and the mounting circuit, the parameters should be
determined in consultation with the resonator manufacturer. The design must ensure that a voltage
exceeding the maximum rating is not applied to the resonator pin.
18.5.3
When using the crystal resonator, place the crystal resonator and its load capacitors as close as
possible to the XTAL and EXTAL pins. Other signal lines should be routed away from the
oscillation circuit as shown in figure 18.6 to prevent induction from interfering with correct
oscillation.
Figure 18.7 shows a connection example of bypass capacitor. Please be sure to insert bypass
capacitor (CB) close to the Vcc and Vss pins and its capacitance meets the characteristics of the
user system board.
Rev. 3.00 Mar. 14, 2006 Page 668 of 804
REJ09B0104-0300
Notes on Resonator
Notes on Board Design
Figure 18.6 Note on Board Design for Oscillation Circuit
Inhibited
C
C
L2
L1
Signal A Signal B
XTAL
EXTAL
This LSI