H838532H datasheet(109/508 Pages) RENESAS

Part #	H838532H

Description	16-Bit Single-Chip Microcomputer H8 Family / H8/300H Super Low Power Series

PDF	508 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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109 / 508 page

Section 4 Clock Pulse Generators

Rev. 1.00 May 30, 2008 Page 89 of 484

REJ09B0436-0100

4.3

Subclock Generator

(1) Connecting a 32.768 kHz/38.4 kHz Crystal Oscillator

Clock pulses can be supplied to the subclock divider by connecting a 32.768 kHz/38.4 kHz crystal

oscillator, as shown in figure 4.6. Follow the same precautions as noted under 3. notes on board

design for the system clock in 4.2.

C = C

= 15 pF (typ.)

Note: Circuit constants should be determined in consultation

with the resonator manufacturer.

32.768 kHz

Nihon Denpa Kogyo

MX73P

38.4 kHz

VTC-200

Seiko Instrument Inc.

Oscillation frequency

Manufacturer

Products Name

Figure 4.6 Typical Connection to 32.768 kHz/38.4 kHz Crystal Oscillator (Subclock)

Figure 4.7 shows the equivalent circuit of the 32.768 kHz/38.4 kHz crystal oscillator.

LRS

C = 1.5 pF typ

R = 14 k

typ

= 32.768 kHz/38.4kHz

Ω

Figure 4.7 Equivalent Circuit of 32.768 kHz/38.4 kHz Crystal Oscillator

H838532H Datasheet(PDF) 109 Page - Renesas Technology Corp