RX8111CE
Page
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4
ETM61E-01
4. Connection Example
4.1. Battery Switchover connection Examples
Note. When connecting an outside power supply or a large-sized battery to V
BAT
,
install bypass capacitors more than 0.1
F in a V
BAT
terminal if necessary.
As for each of bypass-capacitor, Install nearest in each of pin as much as possible.
EX.1 V
IO
and V
DD
are different.
V
DD
V
BAT
V
IO
1.8 V
3.3 V
R
0.1
F
Re-chargeable
Battery
EDLC
or
0.1
F
1.0
F
V
OUT
Figure 3 Connection example 1
Ex.2 V
IO
and V
DD
are the same.
V
DD
V
BAT
V
IO
3.3 V
3.3 V
R
0.1
F
Re-Chargeable
battery
EDLC
or
1.0
F
V
OUT
Figure 4 Connection example 2
Ex.3 Connecting a Non RE-Chargeable battery
V
DD
VBAT
V
IO
V
DD
R
0.1
F
Non Re-chargeable
battery
1.0
F
V
OUT
Figure 5 Connection example3
Ex.4 Not using power-switch function
V
DD
V
BAT
V
IO
V
DD
0.1
F
1.0
F
V
OUT
SW1
SW2
SW3
INIEN = 0, CHGEN = 0, SWSEL1,0 = 10b
Figure 6 Connection Example 4