h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 1006

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 22B Clock Pulse Generator (H8S/2639 Group, H8S/2635 Group)
External circuitry such as that shown below is recommended around the PLL.
W
R1: 3 k
C1: 470 pF
PLLCAP
PLLVSS
VCC
m
CB: 0.1
F *
VSS
(Values are preliminary recommended values.)
Note: * CB is laminated ceramic capacitors.
Figure 22B-5 Points for Attention when Using PLL Oscillation Circuit
Place oscillation stabilization capacitor C1 and resistor R1 close to the PLLCAP pin, and ensure
that no other signal lines cross this line. Supply the C1 ground from PLLVSS.
Separate PLLVSS from the other VCC and VSS lines at the board power supply source, and be
sure to insert bypass capacitors CB close to the pins.
Rev. 6.00 Feb 22, 2005 page 946 of 1484
REJ09B0103-0600