Datasheet

bq2060A
www.ti.com SLUS500D –OCTOBER 2001– REVISED OCTOBER 2011
Table 3. bq2060A Register Functions (continued)
COMMAND CODE
SMBus
FUNCTION UNITS
ACCESS
SMBus HDQ16
AverageTimeToEmpty 0x12 0x12 read minutes
AverageTimeToFull 0x13 0x13 read minutes
ChargingCurrent 0x14 0x14 read mA
ChargingVoltage 0x15 0x15 read mV
Battery Status 0x16 0x16 read n/a
CycleCount 0x17 0x17 read cycles
DesignCapacity 0x18 0x18 read mAh, 10 mWh
DesignVoltage 0x19 0x19 read mV
SpecificationInfo 0x1a 0x1a read n/a
ManufactureDate 0x1b 0x1b read n/a
SerialNumber 0x1c 0x1c read integer
Reserved 0x1d–0x1f 0x1d–0x1f – –
ManufacturerName 0x20 0x20–0x25 read string
DeviceName 0x21 0x28–0x2b read string
DeviceChemistry 0x22 0x30–0x32 read string
ManufacturerData 0x23 0x38–0x3b read string
Pack Status 0x2f (LSB) 0x2f (LSB) read/write n/a
Pack Configuration 0x2f (MSB) 0x2f (MSB) read/write n/a
VCELL4 0x3c 0x3c read/write mV
VCELL3 0x3d 0x3d read/write mV
VCELL2 0x3e 0x3e read/write mV
VCELL1 0x3f 0x3f read/write mV
MAIN GAS GAUGE REGISTERS
RemainingCapacity() (RM)
RM represents the remaining capacity in the battery. The bq2060A computes RM in either mAh or 10 mWh,
depending on the selected mode.
On initialization, the bq2060A sets RM to 0. RM counts up during charge to a maximum value of FCC and down
during discharge and self-discharge to 0. In addition to charge and self-discharge compensation, the bq2060A
calibrates RM at three low-battery-voltage thresholds, EDV2, EDV1, and EDV0 and three programmable
midrange thresholds VOC25, VOC50, and VOC75. This provides a voltage-based calibration to the RM counter.
DesignCapacity() (DC)
The DC is the user-specified battery full capacity. It is calculated from Pack CapacityEE 0x3a–0x3b and is
represented in mAh or 10 mWh. It also represents the full-battery reference for the absolute display mode.
FullChargeCapacity() (FCC)
FCC is the last measured discharge capacity of the battery. It is represented in either mAh or 10 mWh depending
on the selected mode. On initialization, the bq2060A sets FCC to the value stored in Last Measured Discharge
EE 0x38–0x39. During subsequent discharges, the bq2060A updates FCC with the last measured discharge
capacity of the battery. The last measured discharge of the battery is based on the value in the DCR register
after a qualified discharge occurs. Once updated, the bq2060A writes the new FCC value to EEPROM in mAh to
Last Measured Discharge. FCC represents the full battery reference for the relative display mode and relative
state of charge calculations.
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