BQ27500_08 Datasheet, PDF (9/39 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

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bq27500
bq27501
System-Side Impedance Track™ Fuel Gauge
SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008
4.1 DATA COMMANDS
4.1.1 STANDARD DATA COMMANDS
The bq27500/1 uses a series of 2-byte standard commands to enable system reading and writing of
battery information. Each standard command has an associated command-code pair, as indicated in
Table 4-1. Because each command consists of two bytes of data, two consecutive I²C transmissions must
be executed both to initiate the command function, and to read or write the corresponding two bytes of
data. Additional options for transferring data, such as spooling, are described in Section 7, I²C Interface.
Standard commands are accessible in NORMAL operation. Read/write permissions depend on the active
access mode, SEALED or UNSEALED (for details on the SEALED and UNSEALED states, see
Section 4.4, Access Modes).
NAME
Control( )
AtRate( )
AtRateTimeToEmpty( )
Temperature( )
Voltage( )
Flags( )
NominalAvailableCapacity( )
FullAvailableCapacity( )
RemainingCapacity( )
FullChargeCapacity( )
AverageCurrent( )
TimeToEmpty( )
TimeToFull( )
StandbyCurrent( )
StandbyTimeToEmpty( )
MaxLoadCurrent( )
MaxLoadTimeToEmpty( )
AvailableEnergy( )
AveragePower( )
TimeToEmptyAtConstantPower( )
Reserved
CycleCount( )
StateOfCharge( )
CNTL
AR
ARTTE
TEMP
VOLT
FLAGS
NAC
FAC
RM
FCC
AI
TTE
TTF
SI
STTE
MLI
MLTTE
AE
AP
TTECP
RSVD
CC
SOC
Table 4-1. Standard Commands
COMMAND CODE
0x00 / 0x01
0x02 / 0x03
0x04 / 0x05
0x06 / 0x07
0x08 / 0x09
0x0a / 0x0b
0x0c / 0x0d
0x0e / 0x0f
0x10 / 0x11
0x12 / 0x13
0x14 / 0x15
0x16 / 0x17
0x18 / 0x19
0x1a / 0x1b
0x1c / 0x1d
0x1e / 0x1f
0x20 / 0x21
0x22 / 0x23
0x24 / 0x25
0x26 / 0x27
0x28 / 0x29
0x2a / 0x2b
0x2c / 0x2d
UNITS
N/A
mA
Minutes
0.1 K
mV
N/A
mAh
mAh
mAh
mAh
mA
Minutes
Minutes
mA
Minutes
mA
Minutes
mWh
mW
Minutes
N/A
Counts
%
SEALED ACCESS
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
UNSEALED ACCESS
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
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GENERAL DESCRIPTION
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