Battery Backup Operation Disruption - Renesas RX230 Series Manual

RX230 Group, RX231 Group
5. When VBATT drops below 2.2V while VCC is on, an alert is displayed.

5.1.2 Battery Backup Operation Disruption

If VCC is turned on after VCC and VBATT were cut off, the time information and SW2 push count saved at
the previous time VCC dropped is displayed on the LCD screen.
Figure 5.5 Display when VCC Recovery after VCC and VBATT Disruption
R01AN4831EJ0100 Rev.1.00
Aug.20.19
Initial Settings and Usage Procedure of RTC Battery Backup Function
Figure 5.3 Display After VCC Recovery
Figure 5.4 Alert Display When VBATT Drops
RX231 Bat backup
Real time
19/05/01
00:10:30
BAT
Capture time
Previous time
19/04/30
23:59:50
BAT
│ SW 00
│ SW 12
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