SH7032 Datasheet, PDF (124/687 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 7 Clock Pulse Generator (CPG)
C_L1 = C_L2 =10–22 pF
C_L1
EXTAL
Rd
C_L2
XTAL
Figure 7.2 Connection of Crystal Resonator (Example)
Table 7.1 Damping Resistance
Frequency [MHz] 2
4
8
12
16
20
Rd [Ω]
1k
500
200
0
0
0
Crystal Resonator: Figure 7.3 shows an equivalent circuit of the crystal resonator. Use a crystal
resonator with the characteristics listed in table 7.2.
XTAL
L
C_L
Rs
C₀
EXTAL
Figure 7.3 Crystal Resonator Equivalent Circuit
Table 7.2 Crystal Resonator Parameters
Frequency (MHz)
Parameter 2
4
8
12
16
20
Rs max [Ω] 500
120
80
60
50
40
Co max [pF] 7
7
7
7
7
7
Rev. 7.00 Jan 31, 2006 page 98 of 658
REJ09B0272-0700