BQ27541-V200_17 Datasheet, PDF (12/46 Pages) Texas Instruments – Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration

bq27541-V200
Not Recommended for New Designs
SLUSA11B – FEBRUARY 2010 – REVISED SEPTEMBER 2013
DEVICE_TYPE: 0X0001
Instructs the fuel gauge to return the device type to addresses 0x00/0x01.
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FW_VERSION: 0X0002
Instructs the fuel gauge to return the firmware version to addresses 0x00/0x01.
HW_VERSION: 0X0003
Instructs the fuel gauge to return the hardware version to addresses 0x00/0x01.
DF_CHECKSUM: 0X0004
Instructs the fuel gauge to compute the checksum of the data flash memory. The checksum value is written and
returned to addresses 0x00/0x01 (UNSEALED mode only). The checksum will not be calculated in SEALED
mode; however, the checksum value can still be read.
RESET_DATA: 0X0005
Instructs the fuel gauge to return the number of resets performed to addresses 0x00/0x01.
PREV_MACWRITE: 0X0007
Instructs the fuel gauge to return the previous command written to addresses 0x00/0x01. The value returned is
limited to less than 0x0020.
CHEM_ID: 0X0008
Instructs the fuel gauge to return the chemical identifier for the Impedance Track™ configuration to addresses
0x00/0x01.
DF_VERSION: 0x000C
Instructs the gas gauge to return the data flash version to addresses 0x00/0x01.
SET_FULLSLEEP: 0X0010
Instructs the gas gauge to set the FullSleep bit in Control Status register to 1. This will allow the gauge to enter
the FULLSLEEP power mode after the transition to SLEEP power state is detected. In FullSleep mode less
power is consumed by disabling an oscillator circuit used by the communication engines. For HDQ
communication one host message will be dropped. For I²C communications the first I²C message will incur a 6–8
millisecond clock stretch while the oscillator is started and stabilized. A communication to the device in
FULLSLEEP will force the part back to the SLEEP mode.
SET_HIBERNATE: 0X0011
Instructs the fuel gauge to force the CONTROL_STATUS [HIBERNATE] bit to 1. This will allow the gauge to
enter the HIBERNATE power mode after the transition to SLEEP power state is detected. The [HIBERNATE] bit
is automatically cleared upon exiting from HIBERNATE mode. The HIBERNATE power mode is only available in
I²C mode.
CLEAR_HIBERNATE: 0X0012
Instructs the fuel gauge to force the CONTROL_STATUS [HIBERNATE] bit to 0. This will prevent the gauge from
entering the HIBERNATE power mode after the transition to SLEEP power state is detected. It can also be used
to force the gauge out of HIBERNATE mode.
SET_SHUTDOWN: 0x0013
Sets the CONTROL_STATUS [SHUTDOWN] bit to 1, thereby enabling the SE pin to change state. The
Impedance Track algorithm controls the setting of the SE pin, depending on whether the conditions are met for
fuel gauge shutdown or not.
CLEAR_SHUTDOWN: 0X0014
Disables the SE pin from changing state. The SE pin is left in a high-impedance state.
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