BQ27350 Datasheet, PDF (9/33 Pages) Texas Instruments – Single Cell Li-Ion Battery Manager With Impedance Track Fuel Gauge Technology

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bq27350
Single Cell Li-Ion Battery Manager
With Impedance Track Fuel Gauge Technology
SLUS754 – MARCH 2007
4.1.1.1 Control( ): 0x00/0x01
Issuing a Control( ) command requires a subsequent two-byte sub-command (little endian format:
least-significant byte written to lowest address location). These additional bytes specify the particular
control function desired. The Control( ) command allows the host to control specific features of the
bq27350 during normal operation and additional features when the bq27350 is in different access modes,
as described in Table 4-2.
Table 4-2. Control( ) Subcommands
CNTL FUNCTION
CONTROL STATUS
DEVICE TYPE
FW VERSION
HW VERSION
DFCHECKSUM
RESET DATA
Reserved
PREV_MACWRITE
CHEMID
BOARD OFFSET
CC INT OFFSET
SET HIBERNATE
CLEAR HIBERNATE
SEALED
IT ENABLE
IFCHECKSUM
CALMODE
RESET
CNTL
DATA
0x0000
0x0001
0x0002
0x0003
0x0004
0x0005
0x0006
0x0007
0x0008
0x0009
0x000b
0x0011
0x0012
0x0020
0x0021
0x0022
0x0040
0x0041
SEALED
ACCESS
Yes
Yes
Yes
Yes
No
No
No
No
Yes
No
No
Yes
Yes
No
No
No
No
No
DESCRIPTION
Reports the status of DF Checksum, Hibernate, IT, etc.
Reports the device type (eg: "bq27350")
Reports the firmware version on the device type
Reports the hardware version of the device type
Enables a DF checksum to be generated and reports on a read
Returns reset data
Not to be used
Returns previous MAC command code
Reports the chemical identifier of the ImpedanceTrack™
configuration
Forces the device Board Offset to be measured and stored
Forces the device to measure and store the internal CC offset
Forces DF:Pack Configuration [HIBERNATE] to 1
Forces DF:Pack Configuration [HIBERNATE] to 0
Places the bq27350 in SEALED access mode
Enables the ImpedanceTrack™ algorithm
Reports the instruction flash checksum
Places the bq27350 in calibration mode
Forces a full reset of the bq27350
CONTROL STATUS: 0x0000
Instructs the gas gauge to return status information to Control addresses 0x00/0x01. The status
word should include the following information.
Table 4-3. CONTROL STATUS Flags
Flags( )
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
High Byte
–
FAS
SS
CSV
CCA
BCA
–
–
Low Byte
–
–
–
–
LDMD
RUP_DIS
VOK
QEN
FAS = Full access sealed (Sealed = 1)
CSV = Indicates a valid DF checksum has been generated
BCA = Board calibration active
RUP_DIS = Indicates Ra table updates disabled
QEN = QMAX updates enabled if set
SS = Sealed state (Sealed = 1)
CCA = Coulomb counter calibration active
LDMD = Indicates Z-track alg, using const. power mode
VOK = Indicates voltages are OK for QMAX update if set
DEVICE TYPE: 0x0001
Instructs the gas gauge to return the device type to addresses 0x00/0x01.
FW_VERSION: 0x0002
Instructs the gas gauge to return the firmware version to addresses 0x00/0x01.
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GENERAL DESCRIPTION
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