H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 472

• Manufacturer Part Number: H8S2110B
• Description: Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 18 Clock Pulse Generator
18.1
Clock pulses can be supplied either by connecting a crystal resonator, or by providing external
clock input.
18.1.1
Figure 18.2 shows a typical method of connecting a crystal resonator. An appropriate damping
resistance R
should be used.
Figure 18.3 shows the equivalent circuit of a crystal resonator. A resonator having the
characteristics given in table 18.2 should be used.
A crystal resonator with frequency identical to that of the system clock ( ) should be used.
Table 18.1 Damping Resistance Values
Frequency (MHz)
R
Rev. 2.00 Mar 21, 2006 page 434 of 518
REJ09B0299-0200
d
( )
Oscillator
Connecting Crystal Resonator
d
, given in table 18.1, should be used. An AT-cut parallel-resonance crystal resonator
XTAL
Figure 18.2 Typical Connection to Crystal Resonator
Figure 18.3 Equivalent Circuit of Crystal Resonator
2
1 k
EXTAL
XTAL
L
R
d
C
C
L
0
4
500
C
C
AT-cut parallel-resonance crystal resonator
L1
L2
R
s
EXTAL
C
L1
8
200
= C
L2
= 10 to 22 pF
10
0