h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 1005

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Crystal Resonator: Figure 22B-3 shows the equivalent circuit of the crystal resonator. Use a
crystal resonator that has the characteristics shown in table 18-3. The crystal resonator frequency
should not exceed 5 MHz.
Table 22B-3 Crystal Resonator Parameters
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 22B-4.
When designing the board, place the crystal resonator and its load capacitors as close as possible
to the XTAL and EXTAL pins.
Frequency (MHz)
R
C
S
0
max (pF)
max ( )
Figure 22B-3 Crystal Resonator Equivalent Circuit
Figure 22B-4 Example of Incorrect Board Design
Section 22B Clock Pulse Generator (H8S/2639 Group, H8S/2635 Group)
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REJ09B0103-0600