BQ2013H Datasheet, PDF (12/24 Pages) Texas Instruments – Gas Gauge IC for Power- Assist Applications

bq2013H
Primary Status Flags Register (FLGS1)
The FLGS1 register (address=01h) contains the primary
bq2013H flags.
The charge status flag (CHGS) is asserted when a
valid charge rate is detected. The bq2013H deems the
charge valid if it results in two NAC updates with V_SRO
> 250µV. A V_SRO of less than 250µV or discharge activity
clears CHGS.
The CHGS location is:
FLGS1 Bits
7
65
4
3
2
1
0
CHGS - -
-
-
-
-
-
where CHGS is
0 Either discharge activity detected or
V_SRO < 250µV
1 Two NAC updates with V_SRO > 250µV
The battery replaced flag (BRP) is asserted whenever
the bq2013H is reset by application of V_CC or by a serial
port command. BRP is reset when either a valid charge
action increments NAC to be equal to LMD, or when a
valid charge action is detected after the EDV1 flag is
asserted. BRP = 1 signifies that the device has been re-
set.
The BRP location is:
FLGS1 Bits
7
65
4
3
2
1
0
- BRP -
-
-
-
-
-
where BRP is
0 bq2013H is charged until NAC = LMD or
on the first charge after or a discharge
which sets the EDV1 flag
1 bq2013H is reset
The valid discharge flag (VDQ) is asserted when the
bq2013H is discharged from NAC=LMD. The flag re-
mains set until either LMD is updated or until one of
three actions that can clear VDQ occurs:
I NAC has been reduced by more than 6% during
because of self-discharge since VDQ was set
I A valid charge action sustained at V_SRO > V_SRQ for at
least two NAC updates
I The EDV1 flag was set at a temperature below 0°C.
The VDQ location is:
FLGS1 Bits
7
65
4
3
2
1
0
-
--
- VDQ -
-
-
where VDQ is
0 Self-discharge reduces NAC by 6%, valid
charge action detected, EDV1 asserted with
the temperature less than 0°C, or reset
1 On first discharge after NAC = LMD
The first end-of-discharge warning flag (EDV1)
warns the user that the battery is empty. SEG1 blinks
at a 4Hz rate and DONE is asserted low. EDV1 detec-
tion is disabled if OVLD = 1. The EDV flag is latched
until a valid charge has been detected.
The EDV1 location is:
FLGS1 Bits
7 65 4
3
2
1
0
-
--
-
-
- EDV1 -
where EDV1 is
0 Valid charge action detected or V_SB ≥ V_EDV1
1 V_SB < V_EDV1 for the delay time, provided
that the OVLD bit is not set
The final end-of-discharge warning flag (EDVF) flag
is used to warn that battery power is at a failure condi-
tion. All segment drivers are turned off. The EDVF flag
is latched until a valid charge has been detected. The
EDVF threshold is set 100mV below the EDV1 thresh-
old.
The EDVF location is:
FLGS1 Bits
7 65 4
3
2
-
--
-
-
-
1
0
- EDVF
Where EDVF is:
0 Valid charge action detected or V_SB ≥ V_EDVF
1 V_SB < V_EDVF, providing the OVLD bit is not
set
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