HD64F36049 datasheet(106/562 Pages) RENESAS

Part #	HD64F36049

Description	Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Tiny Series

PDF	562 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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106 / 562 page

Section 5 Clock Pulse Generators

Rev. 3.00 Mar. 15, 2006 Page 74 of 526

REJ09B0060-0300

5.4

Usage Notes

5.4.1

Notes on Resonators

Resonator characteristics are closely related to board design and should be carefully evaluated by

the user, referring to the examples shown in this section. Resonator circuit constants will differ

depending on the resonator element, stray capacitance in its interconnecting circuit, and other

factors. Suitable constants should be determined in consultation with the resonator element

manufacturer. Design the circuit so that the resonator element never receives voltages exceeding

its maximum rating.

5.4.2

Notes on Board Design

When using a crystal resonator (ceramic resonator), place the resonator and its load capacitors as

close as possible to the OSC

1 and OSC2 pins. Other signal lines should be routed away from the

resonator circuit to prevent induction from interfering with correct oscillation (see figure 5.11).

OSC

Signal A

Signal B

Avoid

Figure 5.11 Example of Incorrect Board Design

HD64F36049 Datasheet(PDF) 106 Page - Renesas Technology Corp