BQ2011_15 Datasheet, PDF (11/26 Pages) Texas Instruments – Gas Gauge IC for High Discharge Rates

bq2011
The W/R values are:
The BRP values are:
CMDR Bits
7
65
4
3
2
1
0
W/R - -
-
-
-
-
-
FLGS1 Bits
7
65
4
3
2
1
0
- BRP -
-
-
-
-
-
Where W/R is:
0 The bq2011 outputs the requested register
contents specified by the address portion of
CMDR.
1 The following eight bits should be written
to the register specified by the address por-
tion of CMDR.
The lower seven-bit field of CMDR contains the address
portion of the register to be accessed. Attempts to write
to invalid addresses are ignored.
CMDR Bits
765 4
3
2
1
0
-
AD6 AD5 AD4
AD3
AD2
AD1
AD0
(LSB)
Where BRP is:
0 bq2011 is charged until NAC = LMD or dis-
charged until the EDV flag is asserted
1 SB rising from below 0.1V, or a serial port
initiated reset has occurred
The maximum cell voltage flag (MCV) is asserted
whenever the potential on the SB pin (relative to VSS) is
above 2.0V. The MCV flag is asserted until the condi-
tion causing MCV is removed.
The MCV values are:
FLGS1 Bits
7
65
4
3
2
1
0
-
- MCV -
-
-
-
-
Primary Status Flags Register (FLGS1)
The read-only FLGS1 register (address=01h) contains
the primary bq2011 flags.
The charge status flag (CHGS) is asserted when a
valid charge rate is detected. Charge rate is deemed
valid when VSRO < -400µV. A VSRO of greater than-
400µV or discharge activity clears CHGS.
The CHGS values are:
FLGS1 Bits
7
65
4
3
2
1
0
CHGS - -
-
-
-
-
-
Where CHGS is:
0 Either discharge activity detected or VSRO >
-400µV
1 VSRO < -400µV
The battery replaced flag (BRP) is asserted whenever
the potential on the SB pin (relative to VSS), VSB, rises
above 0.1V and determines the internal registers have
been corrupted. The BRP flag is also set when the
bq2011 is reset (see the RST register description). BRP
is latched until either the bq2011 is charged until NAC
= LMD or discharged until EDV is reached. BRP = 1
signifies that the device has been reset.
Where MCV is:
0 VSB < 2.0V
1 VSB > 2.0V
The capacity inaccurate flag (CI) is used to warn the
user that the battery has been charged a substantial
number of times since LMD has been updated. The CI
flag is asserted on the 64th charge after the last LMD
update or when the bq2011 is reset. The flag is cleared
after an LMD update.
The CI values are:
FLGS1 Bits
7
65
4
3
2
1
0
-
- - CI -
-
-
-
Where CI is:
0 When LMD is updated with a valid full dis-
charge or the bq2011 is reset
1 After the 64th valid charge action with no
LMD updates
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