HD64F36049 datasheet(102/562 Pages) RENESAS

Part #	HD64F36049

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

PDF	562 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

Logo

102 / 562 page

Section 5 Clock Pulse Generators

Rev. 3.00 Mar. 15, 2006 Page 70 of 526

REJ09B0060-0300

5.1

System Clock Generator

Clock pulses can be supplied to the system clock divider either by connecting a crystal or ceramic

resonator, or by providing external clock input. Figure 5.2 shows a block diagram of the system

clock generator.

LPM

LPM: Low-power mode (standby mode, subactive mode, subsleep mode)

OSC

Figure 5.2 Block Diagram of System Clock Generator

5.1.1

Connecting Crystal Resonator

Figure 5.3 shows a typical method of connecting a crystal resonator. An AT-cut parallel-resonance

crystal resonator should be used. Figure 5.4 shows the equivalent circuit of a crystal resonator. A

resonator having the characteristics given in table 5.1 should be used.

OSC

C = C = 10 to 22pF

Figure 5.3 Typical Connection to Crystal Resonator

OSC1

OSC2

Figure 5.4 Equivalent Circuit of Crystal Resonator

HD64F36049 Datasheet(PDF) 102 Page - Renesas Technology Corp