HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 153

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

(2) Crystal Oscillator: The external crystal should have the characteristics listed in table 8-1.
Table 8-1 External Crystal Parameters
Frequency (MHz)
Rs max (Ω)
C
(3) Note on Board Design: When an external crystal is connected, other signal lines should be
When the board is designed, the crystal and its load capacitors should be placed as close as
possible to the XTAL and EXTAL pins.
0
(pF)
kept away from the crystal circuit to prevent induction from interfering with correct
oscillation. See figure 8-4.
XTAL
Figure 8-2 Connection of Crystal Oscillator (Example)
2
500
7pF max
Figure 8-3 Crystal Oscillator Equivalent Circuit
EXTAL
XTAL
L
4
120
8
60
C
L
136
C
C
12
40
C
L1
L2
0
AT-cut parallel resonating crystal
C
16
30
L1
=C
R
L2
S
=10 to 22pF
20
20
EXTAL