r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 96

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Section 4 Clock Pulse Generator (CPG)
4.6
Clock pulses can be supplied from a connected crystal resonator or an external clock.
4.6.1
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.
Table 4.6
Figure 4.3 shows an equivalent circuit of the crystal resonator. Use a crystal resonator with the
characteristics listed in table 4.7.
Rev. 1.00 Sep. 21, 2007 Page 70 of 1124
REJ09B0402-0100
Frequency (MHz)
Rd (Ω) (Reference values)
Oscillator
Connecting Crystal Resonator
Damping Resistance Values (Reference Values)
EXTAL
XTAL
Figure 4.2 Connection of Crystal Resonator (Example)
Figure 4.3 Crystal Resonator Equivalent Circuit
R
d
XTAL
5
500
C
C
L1
L2
L
C
C
C
L1
L
0
= C
8
200
L2
R s
= 18 to 22 pF (Reference values)
EXTAL
10
0
12.5
0