BQ2060 Datasheet, PDF (28/51 Pages) Texas Instruments – SBS v1.1-Compliant Gas Gauge IC

bq2060
Output:
Block data—data that reflects EEPROM program-
ming as assigned by the manufacturer with maxi-
mum length of 7 characters (7+length byte).
Pack Status and Pack Configuration (0x2f);
[0x2f]
This function returns the Pack Status and Pack Config-
uration registers. The Pack Status register contains a
number of status bits relating to bq2060 operation. The
Pack Status register is the least significant byte of the
word. The Pack Configuration register is the most sig-
nificant byte of the word. The byte reflects how the
bq2060 is configured as defined by the value pro-
grammed in Pack Configuration in EE 0x3f.
The Pack Status Register consists of the following bits:
b7 b6 b5 b4 b3 b2 b1 b0
OCE EDV2 EINT VDQ COK DOK CVOV CVUV
OCE
The OCE bit indicates that offset cancellation is en-
abled. The bq2060 sets this bit after VFC offset calibra-
tion is complete.
0 Offset calibration is not enabled
1 Offset calibration is enabled
EDV2
The EDV2 bit indicates that Voltage() is less than the
EDV2 threshold.
0 Voltage() > EDV2 threshold (discharging)
1 Voltage() ≤ EDV2 threshold
EINT
The EINT bit indicates that the VFC has detected a
charge or discharge pulse.
0 No charge/discharge activity detected
1 Charge/discharge activity detected.
VDQ
The VDQ bit indicates if the present discharge cycle is
valid for an FCC update.
0 Discharge cycle is not valid
1 Discharge cycle is valid
COK
The COK bit indicates the status of the CFC pin of the
bq2060.
0 CFC pin is low
1 CFC pin is high
DOK
The DOK bit indicates the status of the DFC pin of the
bq2060.
0 DFC pin is low
1 DFC pin is high
CVOV
The CVOV bit indicates that a secondary Li-Ion protec-
tion limit has been exceeded. It is set if any individual
cell exceeds the programmed high voltage limit, if the
pack voltage exceeds the overvoltage threshold, or if an
over temperature condition occurs. The bit is not latched
and merely reflects the present overvoltage status.
0 No secondary protection limits exceeded
1 A secondary protection limit exceeded
CVUV
The CVUV bit indicates if any individual cell falls below
the programmed low-voltage limit. The bit applies to
lithium batteries only. The bit is not latched and merely
reflects the present undervoltage status.
0 All series cells are above the low-voltage limit
1 A series cell is below the low voltage limit
VCELL4–VCELL1 (0x3c–0x3f); [0x3c–0x3f]
These functions return the calculated voltages in mV at
the VCELL4 through VCELL1 inputs.
EEPROM
General
The bq2060 accesses the external EEPROM during a
full reset and when storing historical data. During an
EEPROM access, the VOUT pin becomes active and the
bq2060 uses the ESCL and ESDA pins to communicate
with the EEPROM. The EEPROM stores basic configu-
ration information for use by the bq2060. The EEPROM
must be programmed correctly for proper bq2060 opera-
tion.
Memory Map
Table 10 shows the memory map for the EEPROM. It
also contains example data for a 10 series NiMH and a
3s3p Li-Ion battery pack with a 0.05Ω sense resistor.
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