HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 78

• Manufacturer Part Number: HD64F7050
• Description: 32-Bit RISC Microcomputer SuperH RISC engine Family/
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 4 Clock Pulse Generator (CPG)
4.4
Notes on Board Design: When connecting a crystal oscillator, observe the following precautions:
Figures 4.5 show the precautions regarding oscillator block board settings.
PLL Oscillation Power Supply: Place oscillation stabilization capacitor C1 and resistor R1 close
to the PLL and CAP pin, and ensure that no other signal lines cross this line. Supply the C1
ground from PLLV
Separate PLLV
and be sure to insert bypass capacitors C
Rev. 5.00 Jan 06, 2006 page 58 of 818
REJ09B0273-0500
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.
Notes on Using
Figure 4.5 Cautions for Oscillator Circuit System Board Design
CC
and PLLV
SS
.
SS
from the other V
C
C
L1
L2
PB
Crossing of signal
and C
lines prohibited
CC
B
and V
close to the pins.
SS
lines at the board power supply source,
XTAL
EXTAL