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Control(): 0x00 and 0x01
4.1.6 CHEM_ID: 0x0008
Instructs the fuel gauge to return the chemical identifier for the Impedance Track™ configuration to
addresses 0x00 and 0x01. The expected value for bq27441-G1A is 0x0128 and for bq27441-G1B it is
0x0312.
4.1.7 BAT_INSERT: 0X000C
Forces the
Flags() [BAT_DET]
bit to set when the battery insertion detection is disabled via
OpConfig
[BIE]
= 0. In this case, the gauge does not detect battery insertion from the BIN pin logic state, but relies
on the
BAT_INSERT
host subcommand to indicate battery presence in the system. This subcommand
also starts Impedance Track™ gauging.
4.1.8 BAT_REMOVE: 0X000D
Forces the
Flags() [BAT_DET]
bit to clear when the battery insertion detection is disabled via
OpConfig
[BIE]
= 0. In this case, the gauge does not detect battery removal from the BIN pin logic state, but relies
on the
BAT_REMOVE
host subcommand to indicate battery removal from the system.
4.1.9 SET_HIBERNATE: 0x0011
Instructs the fuel gauge to force the
CONTROL_STATUS [HIBERNATE]
bit to 1. If the necessary
conditions are met, this enables 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.
4.1.10 CLEAR_HIBERNATE: 0x0012
Instructs the fuel gauge to force the
CONTROL_STATUS [HIBERNATE]
bit to 0. This prevents 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.
4.1.11 SET_CFGUPDATE: 0x0013
Instructs the fuel gauge to set the
Flags() [CFGUPMODE]
bit to 1 and enter CONFIG UPDATE mode. This
command is only available when the fuel gauge is UNSEALED.
NOTE:
A
SOFT_RESET
subcommand is typically used to exit CONFIG UPDATE mode to resume
normal gauging.
4.1.12 SHUTDOWN_ENABLE: 0x001B
Instructs the fuel gauge to enable SHUTDOWN mode and set the
CONTROL_STATUS [SHUTDOWNEN]
status bit.
4.1.13 SHUTDOWN: 0x001C
Instructs the fuel gauge to immediately enter SHUTDOWN mode after receiving this subcommand. The
SHUTDOWN mode is effectively a power-down mode with only a small circuit biased by the BAT pin
which is used for wake-up detection. To enter SHUTDOWN mode, the
SHUTDOWN_ENABLE
subcommand must have been previously received. To exit SHUTDOWN mode, the GPOUT pin must be
raised from logic low to logic high for at least 200 µs.
4.1.14 SEALED: 0x0020
Instructs the fuel gauge to transition from UNSEALED state to SEALED state and will set bit 7 (0x80) in
the
Update Status
register to 1. The fuel gauge should always be set to the SEALED state for use in end
equipment. The SEALED state blocks accidental writes of specific subcommands (see
) and
most Standard and Extended Commands (see
and
, respectively).
19
SLUUAC9A – December 2013 – Revised May 2015
Standard Commands
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