Notes On Board Design; Figure 21.6 Note On Oscillator Board Design; Figure 21.7 Recommended External Circuitry For Pll Circuit - Renesas H8S/2368 Series Hardware Manual

21.5.3

Notes on Board Design

When using the crystal oscillator, place the crystal oscillator and its load capacitors as close as
possible to the XTAL and EXTAL pins. Other signal lines should be routed away from the
oscillator circuit to prevent induction from interfering with correct oscillation. See figure 21.6.
Avoid
Figure 21.7 shows the external circuitry recommended for the PLL circuit. Separate PLLVcc and
PLLVss from the other Vcc and Vss lines at the board power supply source, and be sure to insert
bypass capacitors CPB and CB close to the pins.
Note: * CB and CPB are laminated ceramic capacitors.

Figure 21.7 Recommended External Circuitry for PLL Circuit

Rev. 2.00, 05/03, page 682 of 820
Signal A Signal B
C
L2
C
L1

Figure 21.6 Note on Oscillator Board Design

Rp: 200
PLLV
CC
PLLV
SS
V
CC
V
SS
This LSI
XTAL
EXTAL
CPB: 0.1 µF *
CB: 0.1 µF *