Datasheet

73
8116J–AVR–06/2013
XMEGA A3B
Not recommended for new designs -
Use ATxmega256A3BU
34.14 VBAT and Battery Backup Characteristics
Table 34-20. VBAT and Battery Backup Characteristics
Symbol Parameter Condition Min Typ Max Units
Vbat supply voltage range Vbbbod 3.6 V
Vbat power-on slope rate Monotonic rising 0.2 V/ms
Vcc Power-loss slope range Monotonic falling 0.1 V/ms
main BOD threshold voltage 1.8 V
BBBOD required voltage change 1.2 V
BBBOD threshold voltage 1.7 2.1 V
BBBOD detection speed 12s
Battery Backup System current
consumption
RTC enabled from 1 Hz TOSC with XOSC
Failure Monitor enabled
530 nA
RTC enabled from 1 Hz Hi ESR mode
and XOSC Failure Monitor enabled
680 nA
VBAT pin leackage
Powering Battery Backup module from
Vcc
50 nA
Delay from setting XOSCFDEN to
setting XOSCEN
200 µS
Missing crystal oscillator cycles
before XOSCFAIL is set
32 cycles