HD6433308 HITACHI [Hitachi Semiconductor], HD6433308 Datasheet - Page 274

• Manufacturer Part Number: HD6433308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

Table 16-1. External Crystal Parameters
Frequency (MHz)
Rs max (Ω)
C
kept away from the crystal circuit to prevent induction from interfering with correct oscillation.
See Figure 16-4. The crystal and its load capacitors should be placed as close as possible to the
XTAL and EXTAL pins.
0
Crystal Oscillator: The external crystal should have the characteristics listed in Table 16-1.
Note on Board Design: When an external crystal is connected, other signal lines should be
(pF)
XTAL
Figure 16-2. Connection of Crystal Oscillator (Example)
Figure 16-3. Equivalent Circuit of External Crystal
2
500
EXTAL
XTAL
4
120
L
8
60
7 pF max
C
L
266
12
40
C
C
C
L1
L2
0
AT-cut parallel resonating crystal
C
16
30
L1
= C
R
L2
S
= 10 to 22pF
20
20
EXTAL