BQ27620-G1 Datasheet, PDF (12/45 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27620-G1
SLUSAE3 – OCTOBER 2012
www.ti.com
4.1.1.1.1 CONTROL_STATUS: 0x0000
Instructs the fuel gauge to return status information to control addresses 0x00/0x01. The status word
includes the following information.
Table 4-3. CONTROL_STATUS Bit Definitions
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
High byte
-
FAS
SS
RSVD
-
-
OCVCMDCOMP OCVFAIL
Low byte INITCOMP HIBERNATE RLearn
SLEEP
LDMD RUP_DIS
VOK
OPTMIZ
FAS = Status bit indicating the bq27620-G1 is in FULL ACCESS SEALED state. Active when set.
SS = Status bit indicating the bq27620-G1 is in SEALED state. Active when set.
OCVCMDCOMP = Status bit indicating the bq27620-G1 has executed the OCV command. This bit can only be set with battery’s presence.
True when set.
OCVFAIL = Status bit indicating bq27620-G1 OCV reading is failed due to the current. This bit can only be set with battery’s presence. True
when set.
INITCOMP = Initialization completion bit indicating the initialization completed. This bit can only be set with battery’s presence. True when
set.
HIBERNATE = Status bit indicating a request for entry into HIBERNATE from SLEEP mode. True when set. Default is 0.
RLean = Indicates that resistance has been learned. True when set.
LDMD = Status bit indicating the bq27620-G1 Impedance Track™ algorithm is using constant-power mode. True when set. Default is 0
(constant-current mode).
RUP_DIS = Status bit indicating the bq27620-G1 Ra table updates are disabled. Updates disabled when set.
VOK = Status bit indicating that a relaxed OCV measurement has occurred, always clears at the onset of charge or discharge currents.
True when set.
OPTMIZ = Status bit indicating the bq27620-G1 is in an optimization mode; when set the gauge is in its optimization mode of operation for
determining Qmax. True when set.
4.1.1.1.2 DEVICE_TYPE: 0x0001
Instructs the fuel gauge to return the device type to addresses 0x00/0x01.
4.1.1.1.3 FW_VERSION: 0x0002
Instructs the fuel gauge to return the firmware version to addresses 0x00/0x01. Refer to Available Options
for the expected data value.
4.1.1.1.4 HW_VERSION: 0x0003
Instructs the fuel gauge to return the hardware version to addresses 0x00/0x01.
4.1.1.1.5 PREV_MACWRITE: 0x0007
Instructs the fuel gauge to return the previous subcommand written to addresses 0x00/0x01. Note: This
subcommand is only supported for previous subcommand codes 0x0000 through 0x0014. For
subcommand codes greater than 0x0009, a value of 0x0007 is returned.
4.1.1.1.6 CHEM_ID: 0x0008
Instructs the fuel gauge to return the chemical identifier for the Impedance Track™ configuration to
addresses 0x00/0x01.
4.1.1.1.7 OCV CMD: 0X000C
This command is to request the gauge to take a OCV reading. This command can only be issued after the
[INICOMP] has been set, indicating the initialization has been completed. The OCV measurement take
place at the beginning of the next repeated 1s firmware synchronization clock. During the same time
period, the SOC_INT will pulse. The host should use this signal to reduce the load current below the C/20
in 8ms for a valid OCV reading. The OCV command [OCVFAIL] bit will be set if the OCV_CMD is issued
when [CHG_INH] is set.
12
GENERAL DESCRIPTION
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