BQ2085 Datasheet, PDF (38/56 Pages) Texas Instruments – SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311

bq2085
SLUS541 – OCTOBER 2002
VDQ
The VDQ bit indicates if the present discharge cycle is valid for an FCC update.
SOV
0 Discharge cycle not valid
1 Discharge cycle valid
The SOV bit indicates that the safety output limits have been exceeded. Once set, the flag stays set until the
bq2085 is reset.
0
1
CVOV
Safety limits not exceeded
Safety limits exceeded
The CVOV bit indicates that a protection limit has been exceeded. It is set on a Prolonged Overcurrent,
Overvoltage, or Overtemperature condition. The bit is not latched and merely reflects the present fault status.
0
1
CVUV
No secondary protection limits exceeded
A secondary protection limit exceeded
The CVUV bit indicates that a protection limit has been exceeded. It is set on an overload or overdischarge
condition. The bit is not latched and merely reflects the present fault status.
0 No secondary protection limits exceeded
1 A secondary protection limit exceeded
VCELL4-VCELL1 (0x3c-0x3f)
These functions return the calculated individual cell voltages in mV.
Data Flash
General
The bq2085 accesses the internal data flash during reset and when storing historical data. The data flash stores
basic configuration information for use by the bq2085. The data flash must be programmed correctly for proper
bq2085 operation.
Memory Map
Table 13 shows the memory map for the data flash. It shows the default programming for the bq2085. The
default programming reflects example data for a 3s2p Li-Ion battery pack with a 0.02 Ω sense resistor. The data
flash must be reprogrammed to meet the requirements of individual applications.
38
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