SH7101 Datasheet, PDF (82/486 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

4. Clock Pulse Generator
C_L1
EXTAL
XTAL
R_d
C_L2
C_L1 = C_L2 = 18–22 pF (Recommended value)
Figure 4.2 Connection of Crystal Resonator (Example)
Table 4.1 Damping Resistance Values
Frequency (MHz)
4
8
10
Rd (Ω)
500
200
0
Crystal Resonator: Figure 4.3 shows an equivalent circuit of the crystal resonator. Use a crystal
resonator with the characteristics listed in table 4.2.
XTAL
C_L
L
Rs
EXTAL
C₀
AT-cut parallel-resonance type
Figure 4.3 Crystal Resonator Equivalent Circuit
Table 4.2 Crystal Resonator Characteristics
Frequency (MHz)
4
8
10
Rs max (Ω)
120
80
60
C0 max (pF)
7
7
7
Rev.2.00 Sep. 27, 2007 Page 48 of 448
REJ09B0394-0200