Epson RX8111CE - 14.8.4. Time stamp function triggered by I2 C access

RX8111CE
Page − 40
ETM61E-01
8) Battery Backup Switchover related register SWSEL1, SWSEL0 bit
If user do not use switchover function (INIEN = 0), these two registers can fix MOS SW setting.
Table 48 Battery Backup Switchover SW register
INIEN
SWSEL1
SWSEL0
SW3
SW2
SW1
I
2
C Bus
Remarks
0
0
1
ON
OFF
OFF
OFF
Default
1
0
OFF
OFF
ON
OFF
0
0
ON
OFF
OFF
OFF
1
1
1
Prohibited
Other than (1,1)
Automatic control
ON
9) Voltage detection intermittent timing
Table 49 Voltage detection timing
Power
Supply
Normal mode
Backup mode
VDD drive
（CHGEN=1,
INIEN=1）
VDD drive
（CHGEN=0,
INIEN=1）
VDD drive
（CHGEN=0,
INIEN=0）
VBATdrive
VDD detection
VDET1
anytime
anytime
suspended
Once a 31.25 ms
VDD vs VBAT
VCMP
Twice a 3.0 s
suspended
suspended
Suspended
VBAT detection
VLOW
Once a 3.0 s
once a 3.0 s
once a 3.0 s
Once a 3.0 s
V
LOW
If results (continuous 2 times) are same, that is reflected to V
LOW
.