BQ2085 Datasheet, PDF (37/56 Pages) Texas Instruments – SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311

bq2085
SLUS541 – OCTOBER 2002
The following is a partial list of chemistries and their expected abbreviations. These abbreviations are not case
sensitive.
Lead acid
Lithium ion
Nickel cadmium
Nickel metal hydride
Nickel zinc
Rechargeable alkaline-manganese
Zinc air
PbAc
LION
NiCd
NiMH
NiZn
RAM
ZnAr
The ManufacturerData( ) (0x23)
Description: This function allows access to the manufacturer data contained in the battery (data). The bq2085
stores seven critical operating parameters in this data area.
Purpose: The ManufacturerData( ) function may be used to access the manufacturer’s data area. The data
fields of this command reflect the programming of eight critical data flash locations and can be used to facilitate
evaluation of the bq2085 under various programming sets. The ManufacturerData( ) function returns the
following information in order: Pack Configuration, Gauge Configuration, Misc Configuration, Digital Filter, Self
Discharge Rate, Pack Load Estimate, Battery Low%, and Near Full (2 bytes) AFE Status, and the pending EDV
threshold voltage (low byte and high byte).
SMBus protocol: Read block
Output: Block data—data that reflects data flash programming as assigned by the manufacturer with maximum
length of 13 characters (12 + length byte).
Pack Status and Pack Configuration (0x2f)
This function returns the pack status and pack configuration registers. The pack status register contains a
number of status bits relating to bq2085 operation. The pack status register is the least significant byte of the
word.
The pack configuration register reflects how the bq2085 is configured as defined by the value programmed in
Pack Configuration in DF 0x28.
The pack status register consists of the following bits:
b7
b6
b5
b4
b3
b2
b1
b0
AFE
EDV2
SS
VDQ
0
SOV
CVOV
CVUV
AFE
The AFE bit indicates whether the bq29311 RAM integrity check has failed.
0 bq29311 integrity check passed
1 bq29311 integrity check failed
EDV2
The EDV2 bit indicates that pack or cell voltage (program option) is less than the EDV2 threshold.
0 Voltage > EDV2 threshold (discharging)
1 Voltage ≤ EDV2 threshold
SS
The SS bit indicates the seal state of the bq2085.
0 The bq2085 is in the unsealed state.
1 The bq2085 is in the sealed state.
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