Epson RX8130CE - Page 47

15 Battery backup switchover function
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ETM50E-07 Seiko Epson Corporation 46
5) VBFF bit
This bit indicates if the battery if fully charged (update Every 1sec)
Table 40 VBFF
VBFF
Data
Description
Read
0
Charging
1
Full charge of V
BAT
detected
(voltage level defined by BFVSEL-bit is
reached)
This flag shows the V
BAT
charge state.
6) VBLF bit
Low V
BAT
detection
Table 41 VBLF
VBLF
Data
Description
Write
0
Cleared to zero to prepare for the next status detection.
1
Invalid (writing a 1 will be ignored)
Read
0

1
Low-V
BAT
has been detected (V
DET
4)
7) VBLFE bit
Re-chargeable battery full charge detection (Every 1 s)
Table 42 VBLFE
VBLFE
Data
Description
Write
0
CHGEN:0 VBLF detection not available
CHGEN:1 VBLF detection available (during normal mode re-chargeable
battery charging)
1
During V
DD
supply VBLF detection available
To use VBLF detection, it must be set up "INIEN=1" before the setting once at least, and VBLFE bit setting.
During normal mode (V
DD
drive) V
BAT
low voltage (Non-rechargeable, rechargeable battery) can be detected. In
case of backup mode VBLF function is not available, VBLF is detected after returning to normal mode.
9): STOP bit function
When STOP=1, in backup-mode, 31.25ms period of V
DET
2 detection stops.
As a result, power supply switching becomes insufficient, and there is the possibility that a leak current occurs.
When STOP=1 and shift to backup-mode, clear the STOP bit to 0 after V
DD
-ON immediately.