BQ2060A_15 Datasheet, PDF (26/61 Pages) Texas Instruments – SBS v1.1-Compliant Gas Gauge IC

bq2060A
SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011
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Table 9. Battery Mode Bits and Values
Battery Mode() Bits
INTERNAL_CHARGE_CONTROLLER
PRIMARY_BATTERY_SUPPORT
Reserved
RELEARN_FLAG
CHARGE_CONTROLLER_ENABLED
PRIMARY_BATTERY
Reserved
ALARM_MODE
CHARGER_MODE
CAPACITY_MODE
Bits Used
0
1
2–6
7
8
9
10–12
13
14
15
Format
Read only bit flag
Read only bit flag
Allowable Values
Read only bit flag
R/W bit flag
R/W bit flag
0—Battery OK
1—Relearn cycle requested
R/W bit flag
R/W bit flag
R/W bit flag
0—Enable alarm broadcast (default)
1—Disable alarm broadcast
0—Enable charging broadcast (default)
1—Disable charging broadcast
0—Report in mA or mAh (default)
1—Report in 10 mW or 10 mWh
ALARM_MODE bit is set to disable the bq2060 ability to master the SMBus and send AlarmWarning() messages
to the SMBus Host and the Smart Battery Charger. When set, the bq2060A does NOT master the SMBus, and
AlarmWarning() messages are NOT sent to the SMBus Host and the Smart Battery Charger for a period of no
more than 65 s and no less than 45 s. When cleared (default), the Smart Battery sends the AlarmWarning()
messages to the SMBus Host and the Smart Battery Charger any time an alarm condition is detected.
• The bq2060A polls the ALARM_MODE bit at least every 150 ms. Whenever the ALARM_MODE bit is set, the
bq2060A resets the bit and starts or restarts a 55-s (nominal) timer. After the timer expires, the bq2060A
automatically enables alarm broadcasts to ensure that the accidental deactivation of broadcasts does not
persist. To prevent the bq2060A from becoming a master on the SMBus, an SMBus host must therefore
continually set this bit at least once per 50 s to keep the bq2060A from broadcasting alarms.
• The ALARM_MODE bit defaults to a cleared state within 130 ms after the bq2060A detects the SMBus
Off-State.
• The condition of the ALARM-MODE bit does NOT affect the operation or state of the CHARGER_MODE bit
which is used to prevent broadcasts of ChargingCurrent() and ChargingVoltage() to the Smart Battery
Charger.
CHARGER_MODE bit enables or disables the bq2060 transmission of ChargingCurrent() and ChargingVoltage()
messages to the Smart Battery Charger. When set, the bq2060A does NOT transmit ChargingCurrent() and
ChargingVoltage() values to the Smart Battery Charger. When cleared, the bq2060A transmits the
ChargingCurrent() and ChargingVoltage() values to the Smart Battery Charger. The CHARGER_MODE bit
defaults to a cleared state within 130 ms after the bq2060A detects the SMBus Off-State.
CAPACITY_MODE bit indicates if capacity information is reported in mA/mAh or 10 mW/10 mWh. When set, the
bq2060A reports capacity information in 10 mW/10 mWh as appropriate. When cleared, the bq2060A reports
capacity information in mA/mAh as appropriate. The CAPACITY_MODE bit defaults to a cleared state within
130 ms after the bq2060A detects the SMBus Off-State.
Note 1: The following functions are changed to accept or return values in mA/mAh or 10 mW/10 mWh depending
on the CAPACITY_MODE bit:
• RemainingCapacityAlarm()
• AtRate()
• RemainingCapacity()
• FullChargeCapacity()
• DesignCapacity()
Note 2: The following functions are calculated on the basis of capacity and may be calculated differently
depending on the CAPACITY_MODE bit:
• AtRateOK()
• AtRateTimeToEmpty()
• AtRateTimeToFull()
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