SH7014 Datasheet, PDF (89/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Table 4.2 Crystal Oscillator Parameters
Parameter
4
Rs max (Ω)
120
Co max (pF)
7
4. Clock Pulse Generator (CPG)
Frequency (MHz)
8
10
80
60
7
7
Notes on Board Design: When connecting a crystal oscillator, observe the following precautions:
• To prevent induction from interfering with correct oscillation, do not route any signal lines
near the oscillator circuitry.
• When designing the board, place the crystal oscillator and its load capacitors as close as
possible to the XTAL and EXTAL pins.
Figures 4.4 and 4.5 show the precautions regarding oscillator block board settings.
Crossing of signal
lines prohibited
C_L1
XTAL
C_L2
EXTAL
Figure 4.4 Cautions for Oscillator Circuit System Board Design
Rev.5.00 Sep. 27, 2007 Page 55 of 716
REJ09B0398-0500