HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 382

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

11.6
Note on Using a Crystal Resonator: When designing the board, place the crystal resonator,
capacitors CL1 and CL2, and damping register R as close as possible to the XTAL and EXTAL
pins. To prevent inductive interference in oscillation, ensure that the connection points of the
capacitor to be connected to the crystal resonator are common and no other signal lines cross the
signal lines for these pins.
Notes on Bypass Capacitor: A multilayer ceramic capacitor must be inserted for each pair of Vss
and Vcc as a bypass capacitor. The bypass capacitor must be inserted as close as possible to the
power supply pins of the LSI. Note that an appropriate bypass capacitor must be selected
according to the capacitance and frequency of the LSI to be used.
Rev. 1.00, 02/04, page 344 of 804
Notes on Board Design
Signal lines prohibited
EXTAL
Figure 11.2 Note on Using a Crystal Resonator
CL1
This LSI
CL2
XTAL
R
Note: The values for CL1, CL2,
and the damping resistance
should be determined
after consultation with the crystal
resonator manufacturer.