HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 123

• 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

6.2
6.2.1
If an external crystal is connected across the EXTAL and XTAL pins, the on-chip oscillator circuit
generates a system clock signal. Alternatively, an external clock signal can be applied to the
EXTAL pin.
Connecting an External Crystal
Circuit Configuration: An external crystal can be connected as in the example in figure 6.2.
Table 6.1 indicates the appropriate damping resistance Rd. An AT-cut parallel resonance crystal
should be used.
Table 6.1
Frequency (MHz)
Rd max ( )
Crystal Oscillator: Figure 6.3 shows an equivalent circuit of the crystal resonator. The crystal
resonator should have the characteristics listed in table 6.2.
Oscillator Circuit
Oscillator (Generic Device)
Damping Resistance
Figure 6.2 Connection of Crystal Oscillator (Example)
EXTAL
XTAL
2
1 k
Rd
4
500
C
C
L1
L2
8
200
C
L1
10
0
= C
L2
= 10 pF to 22 pF
12
0
16
0
91