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Firmware Version Changes
bq20z80-V101 to bq20z80-V102 Changes
bq20z80-V102
SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007
Table 4. CHANGE DETAILS
CHANGE bq0z80-V102 bq20z80-V101 COMMENTS
Corrected to allow display to LED display operates correctly LED display would stay on until Correct operation of the LED
turn off when charging and during charging. charging terminated after the button display under all conditions
button pushed. was pushed. Only occurs when LED
display not configured to be always
on during charging.
Allow negative LED Configuring negative LED alarm Feature not available Allow better customization
thresholds to permit LED threshold disables LED alarm
alarms to be disabled functionality.
Allow zero values for ALARM Configuring zero value for the Feature not available Allow better customization
and CHARGING LED blink LED blink rates disables them.
rates to disable them
Restore initialization of dodcharge initialized to the dodcharge value set to zero Improved gauging accuracy with
dodcharge in relaxed state correct value correct initialization of dodcharge
so that the correct dodcharge value.
value is used in capacity
estimation
Only clear offset calibration Prevents offset calibration Offset calibration occurs multiple More appropriate period between
flag when SMBus lines go occurring just because a safety times if safety condition occurs offset calibrations when SMBus
high. condition occurs and then clears when SMBus lines are low. lines are low.
when the SMBus lines are low.
Change so that setting AFE Configurable option to allow Feature not available. Allow better customization
Fail Limit to zero disables disabling PF_AFE_C trigger
PF_AFE_C
Enable LED display to turn LED display turns off after charge LED display stays on when charging Correct operation of the LED
off after charge termination termination. terminates after SMBus lines are display under all conditions
and if SMBus lines are detected low.
detected low and LEDs
enabled during charging.
Set charge FET state Charge FET state set correctly, The CHG FET would not get set to Quicker transition of FET to the
immediately when entering immediately after entering sleep the correct state for sleep until the correct state in sleep
sleep first voltage measurement.
Change DF:Operation Cfg B Data flash default bases DF:Operation Cfg B [CCT = 1], Data flash default changed to
[CCT = 0], so that SBS.CycleCount( ) calculation on making the default reflect common customer usage
SBS.CycleCount( ) threshold mAh and not % of FCC SBS.CycleCount( ) calculation to be
is in mAH, not in % of FCC based on % of FCC
When DF:Operation Cfg B Use DF:CC Threshold as the Small or negative SBS.Full Charge Improved system reliability
[CCT = 1], so that minimum to prevent rapid Capacity( ) values (should not occur
SBS.CycleCount( ) threshold incrementing of the under normal operation) from
is % of FCC, then DF:CC SBS.Cyclecount( ), damaging the causing the SBS.CycleCount( )
Threshold is used as a data flash incrementing rapidly, potentially
minimum for the damaging the data flash
SBS.CycleCount( ) threshold
When exiting the relaxed Corrected initial charge capacity If the relaxed state was exited to More reliable
state to sleep, the initial calculation to be accurate when sleep after a valid DOD SBS:FullChargeCapacity( )
charge capacity is correctly exiting relaxed state to sleep measurement (30-minute default calculation under all system
calculated value), then the initial charge conditions
capacity would not be recalculated
and would result in an incorrect FCC
value if the sleep state was exited
before another valid DOD
measurement (30-minute default
value)
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