BQ2016 Datasheet, PDF (17/21 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)
DR2–0
The DR2–0 bits represent the present discharge rate of the battery according to the following code:
DISCHARGE RATE INDICATION
DISCHARGE RATE (R)
DR2 DR1
R ≤ 1C
0
0
1C < R ≤ 3C
0
0
3C < R ≤ 6C
0
1
6C < R ≤ 9C
0
1
9C < R ≤ 12C
1
0
R > 12C
1
0
DR0
0
1
0
1
0
1
OVLD
The bq2016 set the OVLD bit when it detects that the present discharge rate exceeds the programmed overload
threshold.
Bit = Condition
0 Discharge rate is below the overload threshold.
1 Discharge rate is above the overload threshold.
VPFC (0x07) – VPFC Pin Input Level
VPFC stores the input level at the VPFC programming pin. The voltage at the VPFC (V_VPFC) pin is calculated
by
V_VPFC (mV) = Vcc × (V_PFC/256)
VPROG (0x08) – VPROG Pin Input Level
VPROG stores the input level at the VPROG programming pin. The voltage at the VPROG (V_PROG) pin is
calculated by:
V_VPROG (mV) = Vcc × (V_PROG/256)
CPI (0x09) – Capacity Input Level
CPI stores the number of valid charge actions since the last LMD update.
OCTL (0x0a) – Output Control
OCTL provides a means of testing LED functionality. The register consists of:
7
RSVD
6
5
4
3
2
1
0
RSVD OCTL5 OCTL4 OCTL3 OCTL2 OCTL1 Enable
When Enable is low, the bq2016 writes the data in OCTL5–1 to the LED5–1 pins. A one in OCTL5–1 turns the
corresponding LED on. This function overrides the LED indication as a representation of capacity.
FULCNT (0x0b) – Full Count Register
FULCNT store the number of times the battery has been charged to full (NAC=LMD) in 16 count increments.
CMDWD (0x0c) – Command Word
The CMDWD register can be used to reset the bq2016 or initiate a VFC offset calibration.
To reset the bq2016, 0x78 must be written to this location. When reset, the bq2016 sets the following values:
NAC = 0
LMD = PFC
CPI = 0
FULCNT = 0
DCR = 0
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