BQ2084-V133 Datasheet, PDF (53/64 Pages) Texas Instruments – SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312

bq2084-V133
www.ti.com
SLUS640A – JUNE 2005 – REVISED JUNE 2005
DMODE
The DMODE bit determines whether the LED outputs indicate AbsoluteStateOfCharge() or
RelativeStateOfCharge().
0 LEDs reflect AbsoluteStateOfCharge()
1 LEDs reflect RelativeStateOfCharge()
LED1–LED0
The LED bits set the number of LEDs for Remaining Capacity () indication.
0-0 Configures the bq2084-V133 for five LEDs
0-1 Configures the bq2084-V133 for three LEDs
1-0 Configures the bq2084-V133 for four LEDs
1-1 Configures the bq2084-V133 for five LEDs
HPE
The HPE bit enables/disables PEC transmissions to the smart battery host for master mode alarm messages.
0 No PEC byte on alarm warning to host
1 PEC byte on alarm warning to host
CPE
The CPE bit enables/disables PEC transmissions to the smart battery charger for master mode messages.
0 No PEC byte on broadcasts to charger
1 PEC byte on broadcasts to charger
SM
The SM bit enables/disables master mode broadcasts by the bq2084-V133.
0 Broadcasts to host and charger enabled
1 Broadcasts to host and charger disabled
If the SM bit is set, modifications to bits in BatteryMode() do not re-enable broadcasts.
CC1–CC0
The CC bits configure the bq2084-V133 for the number of series cells in the battery pack.
1-1 Configures the bq2084-V133 for four series cells
1-0 Configures the bq2084-V133 for three series cells
0-1 Configures the bq2084-V133 for two series cells
Gauge Configuration
Gauge Configuration (DF 0x29) contains bit-programmable features:
b7
b6
b5
0
CSYNC
SC
b4
CEDV
b3
EDVV
b2
OVSEL
b1
VCOR
b0
OTVC
CSYNC
In usual operation of the bq2084-V133, the CSYNC bit is set so that the coulomb counter is adjusted when a
fast charge termination is detected. In some applications, especially those where an externally controlled
charger is used, it may be desirable not to adjust the coulomb counter. In these cases the CSYNC bit should be
cleared.
0 The bq2084-V133 does not alter RM at the time of a valid charge termination.
1 The bq2084-V133 updates RM with a programmed percentage of FCC at a valid charger termination.
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