BQ2040 Datasheet, PDF (4/33 Pages) Texas Instruments – Gas Gauge IC With SMBus Interface

bq2040
Table 1. Configuration Memory Map
Parameter Name
Address
Description
EEPROM length
0x00
Number of EEPROM data locations
must = 0x64
EEPROM check1
0x01 EEPROM data integrity check byte, must = 0x5b
Remaining time alarm
0x02/0x03 Sets RemainingTimeAlarm (0x02)
Remaining capacity alarm 0x04/0x05 Sets RemainingCapacityAlarm (0x01)
Reserved
0x06/0x07 Reserved for future use
Initial charging current
0x08/0x09 Sets the initial charging current
Charging voltage
0x0a/0x0b Sets ChargingVoltage (0x15)
Battery status
0x0c/0x0d Initializes BatteryStatus (0x16)
Cycle count
0x0e/0x0f Initializes and stores CycleCount (0x17)
Design capacity
0x10/0x11 Sets DesignCapacity (0x18)
Design voltage
0x12/0x13 Sets DesignVoltage (0x19)
Specification information 0x14/0x15 Programs SpecificationInfo (0x1a)
Manufacture date
0x16/0x17 Programs ManufactureDate (0x1b)
Serial number
0x18/0x19 Programs SerialNumber (0x1c)
Fast-charging current
0x1a/0x1b Sets ChargingCurrent (0x14)
Maintenance-charge current 0x1c/0x1d Sets the trickle current request
Reserved
0x1e/0x1f Reserved must = 0x0000
Manufacturer name
0x20-0x2b Programs ManufacturerName (0x20)
Current overload
0x2c/0x2d Sets the overload current threshold
Battery low %
0x2e Sets the battery low amount
Reserved
0x2f Reserved for future use
Device name
0x30-0x37 Programs DeviceName (0x21)
Li-Ion taper current
0x38/0x39
Sets the upper limit of the taper current for charge
termination
Maximum overcharge limit 0x3a/0x3b Sets the maximum amount of overcharge
Reserved
0x3c Reserved must = 0x00
Access protect
0x3d Locks commands outside of the SBS data set
FLAGS1
0x3e Initializes FLAGS1
FLAGS2
0x3f Initializes FLAGS2
Device chemistry
0x40-0x45 Programs DeviceChemistry (0x22)
Current measurement gain 0x46/0x47 Sense resistor calibration value
Battery voltage offset
0x48 Voltage calibration value
Temperature offset
0x49 Temperature calibration value
Maximum temperature and
∆T step
0x4a
Sets the maximum charge temperature and the ∆T
step for ∆T/∆t termination
Length Units
8 bits
NA
8 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
96 bits
16 bits
8 bits
8 bits
64 bits
NA
minutes
mAh
NA
mA
mV
NA
cycles
mAh
mV
NA
NA
NA
mA
mA
mAh
NA
mA
%
NA
NA
16 bits mA
16 bits NA
8 bits
NA
8 bits
NA
8 bits
NA
8 bits
NA
48 bits NA
16 bits NA
8 bits
NA
8 bits
NA
8 bits
NA
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