bq20z80-V101
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SLUS625D–SEPTEMBER 2004–REVISED OCTOBER 2005
CPE
This bit enables or disables PEC transmissions to the smart-battery charger for master-mode alarm
messages.
0 = No PEC byte on alarm warning to charger
1 = PEC byte on alarm warning to charger
NR
This bit can set the bq20z80 in non-removable battery mode and determines the recovery method
for current based Primary Protection features.
0 = Removable battery mode
1 = Non-removable battery mode
CHGIN
This bit can set enable the CHG FET (and ZVCHG FET if used) to turn off when the bq20z80 is in
charge-inhibit mode.
0 = No FET change in charge-inhibit mode.
1 = Charge and ZVCHG, if used, turn off in charge-inhibit mode.
CHGFET
OTFET
This bit enables or disables the CHG FET from reacting to a valid charge termination.
0 = CHG FET stays on at charge termination.
1 = CHG FET turns off at charge termination.
This bit enables or disables FET actions from reacting to an overtemperature fault.
0 = There is NO FET action when an overtemperature condition is detected.
1 = When SBS.SafetyStatus( ) [OTC] is set then the CHG FET is turned off and when
SBS.SafetyStatus( ) [OTD] is set then the DSG FET is turned off
CHGSUSP This bit can enable the CHG FET (and ZVCHG FET if used) to turn off when the bq20z80 is in
Charge Suspend mode.
0 = No FET change in Charge Suspend mode.
1 = Charge and ZVCHG, if used, turns off in Charge Suspend mode.
CCT
This bit sets the format of the Cycle Count Threshold.
0 = DF:Cycle Count is a fixed mAh value.
1 = DF:Cycle Count is in % of SBS.FullChargeCapacity( ).
CHGTERM This bit enables or disables SBS.BatteryStatus( ) [TCA, FC] to be cleared after charger termination
confirmed.
0 = SBS.BatteryStatus( ) [TCA, FC] are not cleared by charge termination confirmation, but are
cleared by other means.
1 = SBS.BatteryStatus( [TCA, FC] are cleared when SBS.Current( ) < DF:Chg Current Threshold
for a period of 2 x DF:Current Taper Window. Note: This does notdisable clearing by
DF:TCA_Clear and DF:FC_Clear.
CSYNC
Enables the bq20z80 to write SBS.RemainingCapacity( ) to equal SBS.FullChargeCapacity( ) when
a valid charge termination is detected.
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