Datasheet

Intel® RAID Portable Cache Module AXXRPCM3 Technical Product Specification Hardware
Revision 1.1
Intel order number E20184-002
10
2.5.2.1 Initialized State
The battery is in the initialized state during a normal power-up sequence. In RAID firmware,
there are two levels of initialization:
 During boot loader execution
 During RAID firmware boot
2.5.2.2 Discharging State
The battery voltage is drained as part of a relearn cycle.
2.5.2.3 Fully Charged State
A battery that is not fully charged has a low-voltage level that indicates the level of charge.
Charging begins when the battery logic detects low voltage and power is supplied.
Once a new battery is fully charged, a relearn cycle is initiated. Relearn is the process of taking
a fully charged battery through the discharge-charge cycle to update the gas gauge capacity
parameters. The relearn cycle takes up to 24 hours to fully-discharge and recharge the battery
pack. After the relearn cycle is complete, information from the battery accurately provides the
state of charge, capacity, and other parameters. These parameters determine the health of the
battery.
 The relearn cycle can be set at a user-definable interval. The default is a one-month (30
days) interval.
 A relearn cycle initiates on a newly-inserted battery, even if the battery was previously
fully charged.
 Some applications can start a relearn, or a relearn can be manually started.
2.5.2.4 Fully-discharged State
The fully-discharged state is detected as a low voltage parameter. The charger detects a fully-
discharged battery state and starts charging the cells when sufficient power is available; and
when the firmware has completed the pack’s initialization.