SH7136 datasheet(96/1160 Pages) RENESAS

Part #	SH7136

Description	32-Bit RISC Microcomputer SuperH??RISC engine Family

PDF	1160 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 4 Clock Pulse Generator (CPG)

Rev. 2.00 Sep. 10, 2008 Page 70 of 1130

REJ09B0402-0200

4.6

Oscillator

Clock pulses can be supplied from a connected crystal resonator or an external clock.

4.6.1

Connecting Crystal Resonator

A crystal resonator can be connected as shown in figure 4.2. Use the damping resistance (Rd)

listed in table 4.6. Use a crystal resonator that has a resonance frequency of 5 to 12.5 MHz. It is

recommended to consult the crystal resonator manufacturer concerning the compatibility of the

crystal resonator and the LSI.

EXTAL

XTAL

CL2

CL1

CL1 = CL2 = 18 to 22 pF (Reference values)

Figure 4.2 Connection of Crystal Resonator (Example)

Table 4.6

Damping Resistance Values (Reference Values)

Frequency (MHz)

12.5

Rd (

Ω) (Reference values)

500

200

Figure 4.3 shows an equivalent circuit of the crystal resonator. Use a crystal resonator with the

characteristics listed in table 4.7.

XTAL

EXTAL

Figure 4.3 Crystal Resonator Equivalent Circuit

SH7136 Datasheet(PDF) 96 Page - Renesas Technology Corp