HD6413003RF Datasheet, PDF (525/715 Pages) Renesas Technology Corp – Microcontroller (MCU)

Table 16-2 Crystal Resonator Parameters
Frequency (MHz)
2
4
8
10
12
16
20
24
Rs max (Ω)
500
120
80
70
60
50
40
40
Co (pF)
7 pF max
Clock-Halving Version: Use a crystal resonator with a frequency equal to twice the system clock
frequency (ø).
1:1 Version: Use a crystal resonator with a frequency equal to the system clock frequency (ø).
Notes 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 16-4.
When the board is designed, the crystal resonator and its load capacitors should be placed as close
as possible to the XTAL and EXTAL pins.
Avoid
C _L2
Signal A
Signal B
H8/3003
XTAL
EXTAL
C _L1
Figure 16-4 Example of Incorrect Board Design
507