Datasheet

Hardware Intel® RAID Smart Battery AXXRSBBU6 Technical Product Specification
Revision 1.0
Intel order number E36068-001
7
2.6 Connector Cable
A 5-pin connector cable connects the battery pack to the Smart Battery circuit board.
Table 4. Connector Pin-outs
Pin Signal Name Description
1 VBATP Positive terminal of the PACK
2 THERMISTOR SENSE Sense contact of the thermistor
3 GND Negative terminal of the PACK
4 SCL Clock for PACK monitoring
5 SDA Data for PACK monitoring
2.7 Battery Pack
The cache-memory hold time depends on the size and configuration of the RAID controller
memory. Retention time varies depending on memory capacity and the number of memory
components used on the DIMM to support that capacity. Estimates for battery backup retention
time with different configurations of DDR2 memory are listed below.
 256 MB (256 Mb devices) = 46 hours
 512 MB (256 Mb devices) = 23 hours
 512 MB (512 Mb devices) = 46 hours
2.7.1 Battery States
The battery pack includes battery sensing logic that senses the battery voltage levels and
recognizes the battery state.
2.7.1.1 Initialized State
The battery is in the initialized state during a normal power-up sequence. In RAID firmware,
there are two times when initialization occurs:
 During boot loader execution
 During RAID firmware boot
2.7.1.2 Discharging State
The battery voltage is drained as part of a relearn cycle.
2.7.1.3 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 discharge-charge cycle to update the gas gauge capacity