Usage Notes - Renesas H8S/2100 Series Hardware Manual

28.6

Usage Notes

It is necessary to connect a bypass capacitor between the VCC pin and VSS pin, and a capacitor
between the VCL pin and VSS pin for stable internal step-down power. An example of connection
is shown in figure 28.30.
Vcc power supply
Bypass
capacitor
10 µF 0.01 µF
It is recommended that a bypass capacitor be connected
to the VCC pin. (The values are reference values.)
When connecting, place a bypass capacitor near the pin.
Figure 28.30 Connection of VCC and VCL Capacitors
VCC
VSS
Section 28 Electrical Characteristics
External capacitor
for internal step-down
power stabilization
One 0.1 µF /
0.47 µF or
two in parallel
Do not connect Vcc power supply to the VCL pin.
Always connect a capacitor for internal step-down power
stabilization. Use one or two ceramic multilayer capacitor(s)
(0.1 µF / 0.47 µF: connect in parallel when using two)
and place it (them) near the pin.
Rev. 1.00 Apr. 28, 2008 Page 981 of 994
VCL
VSS
REJ09B0452-0100