DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 654

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

19.2
Clock pulses can be supplied by connecting a crystal resonator, or by input of an external clock.
19.2.1
A crystal resonator can be connected as shown in the example in figure 19.2. Select the damping
resistance R
Table 19.1 Damping Resistance Value
Figure 19.3 shows the equivalent circuit of the crystal resonator. Use a crystal resonator that has
the characteristics shown in table 19.2.
Table 19.2 Crystal Resonator Characteristics
Rev.7.00 Dec. 24, 2008 Page 600 of 698
REJ09B0074-0700
Frequency (MHz)
R
Frequency (MHz)
R
C
d
S
0
(Ω)
max (pF)
max (Ω)
Connecting a Crystal Resonator
System Clock Oscillator
d
according to table 19.1. An AT-cut parallel-resonance crystal should be used.
Figure 19.2 Connection of Crystal Resonator (Example)
EXTAL
XTAL
6
300
Figure 19.3 Crystal Resonator Equivalent Circuit
6
100
7
XTAL
R
d
8
200
8
80
7
L
C
C
L1
L2
10
100
C
C
10
60
7
L
0
AT-cut parallel-resonance type
R
s
C
(Recommended value, including
stray capacitance of circuit board)
13
0
L1
13
60
7
= C
L2
= 10 to 22 pF
EXTAL
16
0
16
50
7
20
0
20
40
7
24
0
24
40
7