BQ34Z100 Datasheet, PDF (13/50 Pages) Texas Instruments – Wide Range Fuel Gauge with Impedance Track™ Technology

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ENTER_CAL: 0x0081
Instructs the fuel gauge to enter calibration mode.
SLUSAU1 – MAY 2012
OFFSET_CAL: 0x0082
Instructs the fuel gauge to perform offset calibration.
StateOfCharge(): 0x02/0x03
This read-only function returns an unsigned integer value of the predicted remaining battery capacity expressed
as a percentage of FullChargeCapacity(), with a range of 0 to 100%.
RemainingCapacity(): 0x04/0x05
This read-only command pair returns the compensated battery capacity remaining. Units are 1 mAh per bit.
FullChargeCapacity(): 0x06/07
This read-only command pair returns the compensated capacity of the battery when fully charged. Units are 1
mAh per bit except if X10 mode is selected. In X10 mode, units are 10 mAh per bit. FullChargeCapacity() is
updated at regular intervals, as specified by the Impedance Track algorithm.
Voltage(): 0x08/0x09
This read-word function returns an unsigned integer value of the measured cell-pack voltage in mV with a range
of 0 V to 65535 mV.
AverageCurrent(): 0x0a/0x0b
This read-only command pair returns a signed integer value that is the average current flow through the sense
resistor. It is updated every 1 second. Units are 1 mA per bit except if X10 mode is selected. In X10 mode, units
are 10 mA per bit.
Temperature(): 0x0c/0x0d
This read-word function returns an unsigned integer value of the temperature in units of 0.1ºK measured by the
gas gauge and has a range of 0 to 6553.5 ºK. The source of the measured temperature is configured by the
[TEMPS] bit in the Pack Configuration register (see EXTENDED DATA COMMANDS).
TEMPS
0
1
Table 5. Temperature Sensor Selection
Temperature() Source
Internal Temperature Sensor
TS Input (default)
Flags(): 0x0e/0x0f
This read-word function returns the contents of the gas-gauge status register, depicting current operation status.
High Byte
Low Byte
Bit 7
OTC
OCVTAKEN
Bit 6
OTD
ISD
Table 6. Flags Bit Definitions
Bit 5
BATHIGH
TDD
Bit 4
BATLOW
RSVD
Bit 3
CHG_INH
RSVD
Bit 2
RSVD
SOC1
Bit 1
FC
SOCF
Bit 0
CHG
DSG
OTC: Over-Temperature in Charge condition is detected. True when set. OTD = Over-Temperature
in Discharge condition is detected. True when set.
BATHIGH: Battery High bit indicating a high battery voltage condition. Refer to the data flash BATTERY
HIGH parameters for threshold settings.
BATLOW: Battery Low bit indicating a low battery voltage condition. Refer to the data flash BATTERY
LOW parameters for threshold settings.
Copyright © 2012, Texas Instruments Incorporated
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