HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 650

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

25.1
Clock pulses can be supplied either by connecting a crystal resonator, or by providing external
clock input.
25.1.1
Figure 25.2 shows a typical method of connecting a crystal resonator. An appropriate damping
resistance R
should be used.
Figure 25.3 shows the equivalent circuit of a crystal resonator. A resonator having the
characteristics given in table 25.2 should be used.
A crystal resonator with frequency identical to that of the system clock (ø) should be used.
Table 25.1 Damping Resistance Values
Frequency (MHz)
R
Rev. 2.0, 08/02, page 610 of 788
d
( )
Oscillator
Connecting Crystal Resonator
d
, given in table 25.1, should be used. An AT-cut parallel-resonance crystal resonator
XTAL
Figure 25.2 Typical Connection to Crystal Resonator
Figure 25.3 Equivalent Circuit of Crystal Resonator
2
1 k
EXTAL
XTAL
L
R
4
500
d
C
C
L
0
C
C
AT-cut parallel-resonance crystal resonator
L1
L2
8
200
R
s
EXTAL
10
0
C
L1
= C
L2
= 10 to 22 pF
12
0
16
0
20
0