BQ28Z560-R1 datasheet(25/60 Pages) TI1

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SLUSBD3 – APRIL 2013

The AtRate() value is a signed integer with negative values interpreted as a discharge current value. The

AtRateTimeToEmpty() function returns the predicted operating time at the AtRate value of discharge. The default

value for AtRate() is zero and will force AtRateTimeToEmpty() to return 65,535. Both the AtRate() and

AtRateTimeToEmpty() commands should only be used in NORMAL mode.

AtRateTimeToEmpty(): 0x04/0x05

This read-only function returns an unsigned integer value of the predicted remaining operating time if the battery

is discharged at the AtRate() value in minutes with a range of 0 to 65,534. A value of 65,535 indicates AtRate() =

0. The gas gauge updates AtRateTimeToEmpty() within 1 s after the system sets the AtRate() value. The gas

gauge automatically updates AtRateTimeToEmpty() based on the AtRate() value every 1 s. The AtRate() and

AtRateTimeToEmpty() commands should only be used in NORMAL mode.

Temperature(): 0x06/0x07

This read-only function returns an unsigned integer value of the battery temperature in units of 0.1K measured by

the gas gauge.

Voltage(): 0x08/0x09

This read-only function returns an unsigned integer value of the measured cell-pack voltage in mV with a range

of 0 to 6000 mV.

Flags(): 0x0a/0x0b

This read-only function returns the contents of the gas-gauge status register, depicting the current operating

status.

Table 7. Flags Bit Definitions

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

High Byte

BATHI

BATLO

CHG_INH

ALRT

CHG

Low Byte

OCVTAKEN

ISD

TDD

CHGFET

DSGFET

SOC1

SOCF

DSG

These fault flags will only clear if the fault condition is removed:

OT = Overtemperature in a Charge or Discharge condition is detected. True when set.

OC = Overcurrent in a Charge or Discharge condition is detected. True when set.

Battery High bit indicating a high battery voltage condition. Refer to the data flash BATTERY HIGH parameters for

BATHI =

threshold settings.

Battery Low bit indicating a low battery voltage condition. Refer to the data flash BATTERY LOW parameters for

BATLO =

threshold settings.

CHG_INH = Charge Inhibit indicates the temperature is outside the range [Charge Inhibit Temp Low, Charge Inhibit Temp

High]. True when set.

ALRT = Indicates there is an Alert in the system. True when set.

Full-charged is detected. FC is set when charge termination is reached and FC Set% = –1 (see CHARGING AND

FC = CHARGE TERMINATION INDICATION for details) or State of Charge is larger than FC Set% and FC Set% is not –1.

True when set.

CHG = (Fast) charging allowed. True when set.

OCVTAKEN = Cleared on entry to RELAX mode and set to 1 when OCV measurement is performed in RELAX.

ISD = Internal Short is detected. True when set.

TDD = Tab Disconnect is detected. True when set.

CHGFET= Indicates the state of the firmware CFET control. True when set to 1.

DSGFET= Indicates the state of the firmware DFET control. True when set to 1.

SOC1 = State-of-Charge-Threshold 1 (SOC1 Set) reached. True when set.

SOCF = State-of-Charge-Threshold Final (SOCF Set %) reached. True when set.

DSG = Discharging detected. True when set.

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