BQ2083-V1P3 Datasheet, PDF (24/56 Pages) Texas Instruments – SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311

bq2083-V1P3
SLVS508 − OCTOBER 2003
www.ti.com
Purpose: The RemainingTimeAlarm( ) function can be used by systems that want to adjust when the remaining
time alarm warning is sent. The remaining time value can be read to verify the value in use by the bq2083−V1P3
RemainingTimeAlarm( ).
SMBus protocol: Read or write word
Input/Output: Unsigned integer—the point below which remaining time messages are sent.
Units: Minutes
Range: 0 to 65,535 minutes
Granularity: Not applicable
Accuracy: See AverageTimeToEmpty( ).
BatteryMode( ) (0x03)
Description: Selects the various battery operational modes and reports the battery’s mode and requests.
Defined modes include
D Whether the battery capacity information is specified in units of mAh or 10 mWh (CAPACITY_MODE bit)
D Whether the ChargingCurrent( ) and ChargingVoltage( ) values are broadcast to the smart battery charger
when the CHARGER_MODE bit is set.
D Whether all broadcasts to the smart battery charger and host are disabled
The defined request condition is the battery requesting a conditioning cycle (RELEARN_FLAG).
Purpose: The CAPACITY_MODE bit allows power management systems to best match their electrical
characteristics with those reported by the battery. For example, a switching power supply represents a constant
power load, whereas a linear supply is better represented by a constant current model. The CHARGER_MODE
bit allows a SMBus host or smart battery charger to override the smart battery desired charging parameters by
disabling the bq2083−V1P3 broadcasts. The RELEARN_FLAG bit allows the bq2083−V1P3 to request a
conditioning cycle.
SMBus protocol: Read or write word
Input/Output: Unsigned integer—bit mapped— see below.
Units: Not applicable
Range: 0-1
Granularity: Not applicable
Accuracy: Not applicable
The BatteryMode( ) word is divided into two halves, the MSB (bits 8-15) which is read/write and the LSB (bits 0-7)
which is read only. The bq2083−V1P3 forces bits 0-6 to zero and prohibits writes to bit 7.
Table 12 summarizes the meanings of the individual bits in the BatteryMode( ) word and specifies the default
values, where applicable, are noted.
INTERNAL_CHARGE_CONTROLLER bit is not used by the bq2083−V1P3.
PRIMARY_BATTERY_SUPPORT bit is not used by the bq2083−V1P3.
RELEARN_FLAG bit set indicates that the bq2083−V1P3 is requesting a capacity relearn cycle for the battery.
The bq2083−V1P3 sets the RELEARN_FLAG on a full reset and if it detects 20 cycle counts without an FCC
update. The bq2083−V1P3 clears this flag after a learning cycle has been completed.
CHARGE_CONTROLLER_ENABLED bit is not used by the bq2083−V1P3. The bq2083−V1P3 forces this bit to
zero.
PRIMARY_BATTERY bit is not used by the bq2083−V1P3. The bq2083−V1P3 forces this bit to zero.
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