HD6432621 Hitachi, HD6432621 Datasheet - Page 724

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Table 20-3 Crystal Resonator Parameters
Frequency (MHz)
R
C
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 20-4.
When designing the board, place the crystal resonator and its load capacitors as close as possible
to the XTAL and EXTAL pins.
680
S
0
max (pF)
max ( )
Avoid
Figure 20-4 Example of Incorrect Board Design
C
C
L2
L1
4
120
7
Signal A Signal B
8
80
7
H8S/2626 Series or
XTAL
EXTAL
H8S/2623 Series
12
60
7
16
50
7
20
40
7