BQ2016 Datasheet, PDF (16/21 Pages) Texas Instruments – GAS GAUGE IC FOR HIGH DISCHARGE RATES

bq2016
GAS GAUGE IC FOR
HIGH DISCHARGE RATES
SLUS475A– JANUARY 2001 – REVISED NOVEMBER 2002
registers (continued)
MCV
The bq2016 sets the MCV bit when it detects that the maximum cell voltage threshold is being exceeded.
Bit = Condition
0 Cell voltage is below the threshold.
1 Cell voltage is above the threshold.
CI
The bq2016 sets the CI bit on reset and when the CPI register exceeds 64.
Bit = Condition
0 An LMD update has occurred.
1 The bq2016 has been reset or the CPI register exceeds 64.
VDQ
The bq2016 sets the VDQ bit when the present discharge cycle is considered valid for an LMD update.
Bit = Condition
0 The present discharge cycle is not valid for an LMD update.
1 The present discharge cycle is valid for an LMD update.
Bit 2 is reserved.
EDV
The bq2016 sets the EDV bit when the battery voltage drops below the EDV threshold. The bit is latched and
remains set until valid charge activity is detected.
Bit = Condition
0 The battery voltage is greater than the EDV threshold.
1 The battery voltage is less than the EDV threshold.
OCE
The bq2016 sets the OCE bit when an VFC offset calibration has been performed.
Bit = Condition
0 Offset calibration not completed
1 Offset calibration completed
TEMP (0x02) – Temperature
The TEMP register contains the battery temperature as computed using the internal temperature sensor of the
bq2016. It is represented in degrees C. The data is an 8-bit signed integer. For example, –10°C is represented
as F6h.
NAC (0x03) – Nominal Available Capacity
NAC is an 8-bit register that contains the present remaining capacity of the battery pack. The NAC contents are
compensated for rate and temperature. The data is represented in the same units as PFC.
LMD (0x05) – Last Measured Discharge
LMD stores the learned discharge capacity of the battery pack and represents the full charge reference. The
8-bit register presents data in the same units as PFC.
FLAGS2 (0x06) – Second Status Flags
The FLAGS2 register provides bq2016 status information. The 8-bit register includes the following status bits:
7
RSVD
6
DR2
5
DR1
4
DR0
3
RSVD
2
RSVD
1
0
RSVD OVLD
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