HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 128

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 6.5
Frequency (MHz)
Rd max ( )
Crystal Oscillator: Figure 6.9 shows an equivalent circuit of the crystal resonator. The crystal
resonator should have the characteristics listed in table 6.6.
Table 6.6
Frequency (MHz)
Rs max ( )
C
Use a crystal with the same frequency as the desired system clock frequency (ø).
Note on Board Design: When an external crystal is connected, other signal lines should be kept
away from the crystal circuit to prevent induction from interfering with correct oscillation. See
figure 6.10. The crystal and its load capacitors should be placed as close as possible to the XTAL
and EXTAL pins.
96
0
XTAL
(pF)
Damping Resistance
External Crystal Parameters
Figure 6.8 Connection of Crystal Oscillator (Example)
EXTAL
XTAL
Figure 6.9 Equivalent Circuit of External Crystal
L
Rd
C
2
1 k
2
500
7 pF max
L
C
C
L1
L2
C
0
AT-cut parallel resonating crystal
4
120
7 pF max
4
500
C
L1
= C
Rs
L2
8
200
8
80
7 pF max
= 10 pF to 22 pF
10
70
7 pF max
10
0
EXTAL