Table 47 Inien, Swsel Combination; Table 48 The Timing Of Vdet1 - Epson RX4111CE Applications Manual

3) SWSEL1, SWSEL0 bit
When user set INIEN to 0, it is locked status of a built-in MOS switch

Table 47 INIEN, SWSEL combination

INIEN SWSEL1
0
1
0
0
1
1
1
Other than (1,1)
When using a non-re-chargeable battery, it is necessary to install a charge protection diode externally.
Figure 30 Battery backup switchover control (Initial power on)
Voltage detection intermittent timing

Table 48 The timing of VDET1

Power supply
V detection
DET1
RX4111CE
ETM62E-02
SWSEL0 SW
1 OFF
0 ON
0 OFF
1 OFF
1 OFF
Auto control
V (INIEN=1)
DD
Always ON
Seiko Epson Corporation
SPI disable
control
OFF Default
OFF Battery backup switchover function: OFF
OFF Do not select this combination
OFF Do not select this combination
ON SPI-Bus interface: ON
ON Battery backup switchover function: ON
V (INIEN=0)
DD
Stopped
14. How to use
comment
V (Backup mode)
BAT
Once per 31.25 ms
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