Epson RX4111CE - Connection Example; Battery Switchover Connection Examples

4. Connection Example

RX4111CE Jump to Top / Bottom
ETM62E-02 Seiko Epson Corporation 7

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. Ex.2 V
IO
and V
DD
are the same.
Figure 4 Circuit Ex.1
Figure 5 Circuit Ex.2
Ex.3 Connecting a Non RE-Chargeable battery Ex.4 Not using power-switch function
Figure 6 Circuit Ex.3
Figure 7 Circuit EX.4
V
DD
V
BAT
V
IO
1.8 V
3.3 V
I= V/R < 40 mA
0.1 F
0.1 F
Re-chargeable
Battery
EDLC
or
INIEN = 1
V
DD
V
BAT
V
IO
Non-Re-chargeable
battery
3.3 V
I = V/R > 1 mA
0.1 F
INIEN = 1
V
DD
V
BAT
V
IO
Re-chargeable
Battery
3.3 V
EDLC
or
I = V/R < 40 mA
0.1F
INIEN = 1
V
DD
V
BAT
V
IO
3.3 V
0.1 F
INIEN = 0
SWSEL1 = 1
SWSEL0 = 0