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4.6DATAFLASHSUMMARY
bq27500
bq27501
System-SideImpedanceTrack™FuelGauge
SLUS785–SEPTEMBER2007
Boththesetsofkeysforeachlevelare2byteseachinlengthandarestoredindataflash.TheUNSEAL
key(storedatUnsealKey0andUnsealKey1)andtheFULL-ACCESSkey(storedatFullAccessKey
0andFullAccessKey1)canonlybeupdatedwheninFULL-ACCESSmode.Theorderofthebytes
enteredthroughtheControl()commandisthereverseofwhatisreadfromthepart.Forexample,ifthe
1stand2ndwordofUnsealKey0readreturns0x1234and0x5678,thentheControl()shouldsupply
0x3412and0x7856tounsealthepart.
Table4-7summarizesthedataflashlocationsavailabletotheuser,includingtheirdefault,minimum,and
maximumvalues.
Table4-7.DataFlashSummary
SubclassDataMinMaxDefault
ClassSubclassOffsetNameUnits
IDTypeValueValueValue
Configuration2Safety0OTChgI2012005500.1°C
Configuration2Safety2OTChgTimeU10602s
Configuration2Safety3OTChgRecoveryI2012005000.1°C
Configuration2Safety5OTDsgI2012006000.1°C
Configuration2Safety7OTDsgTimeU10602s
Configuration2Safety8OTDsgRecoveryI2012005500.1°C
ChargeInhibit
Configuration320ChargeInhibitTempLow12–400120000.1°C
Config
ChargeInhibit
Configuration322ChargeInhibitTempHigh12–40012004500.1°C
Config
ChargeInhibit
Configuration324TempHys120100500.1°C
Config
Configuration34Charge2ChargingVoltageI20200004200mV
Configuration34Charge4DeltaTemperatureI20500500.1°C
Configuration34Charge6SuspendTemperatureLowI2–4001200–500.1°C
Configuration34Charge8SuspendTemperatureHighI2–40012005500.1°C
Charge
Configuration362TaperCurrentI201000100mA
Termination
Charge
Configuration364MinimumTaperChargeI20100064mAh
Termination
Charge
Configuration366TaperVoltageI201000100mV
Termination
Charge
Configuration368CurrentTaperWindowU106040s
Termination
Configuration48Data0SOC1SetI20700100mAh
Configuration48Data6InitialStandbyCurrentI1–2560–10mA
Configuration48Data7InitialMaxLoadCurrentI2–327670–1000mA
Configuration48Data9CCThresholdI2100327671400mAh
Configuration48Data12DesignCapacityI20655351500mAh
bq27500
Configuration48Data39DeviceNameS8xxor–
bq27501
Configuration49Discharge0SOCFSet%I1–11006%
Configuration49Discharge2SOCFClear%I1–11008%
Configuration49Discharge4MaxLoadRSOCI1010050%
Manufacturer
SystemData580–31BlockA[0–31]H10x000xff0x00–
Info
Manufacturer
SystemData5832–63BlockB[0–31]H10x000xff0x00–
Info
Manufacturer
SystemData5864–95BlockC[0–31]H10x000xff0x00–
Info
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