h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 727

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Table 23.3 Crystal Resonator Parameters
Note on Board Design: When a crystal resonator is connected, the following points should be
noted.
Other signal lines should be routed away from the oscillator circuit to prevent induction from
interfering with correct oscillation. See figure 23.4.
When designing the board, place the crystal resonator and its load capacitors as close as possible
to the XTAL and EXTAL pins.
Frequency (MHz)
R
C
S
0
max (pF)
max ( )
Avoid
Figure 23.4 Example of Incorrect Board Design
2
500
7
C
C
L2
L1
4
120
7
Signal A Signal B
8
80
7
Rev. 4.00 Jun 06, 2006 page 673 of 1004
10
70
7
XTAL
EXTAL
H8S/2138 Group or
H8S/2134 Group
Section 23 Clock Pulse Generator
chip
12
60
7
16
50
7
REJ09B0301-0400
20
40
7