FUNCTIONAL DEVICE OPERATION
BATTERY INTERFACE AND CONTROL
Table 61. Main Control Bit Signals
Name
Description
Control Bits
VCHRG[2:0]
ICHRG[3:0]
TREN
Charger regulator voltage setting
Charger regulator current setting
Internal trickle charger enabling
Battery thermistor check disable
SPI control over BATTFET pin (M3)
THCHKB
FETOVRD: 0 = BATTFET output are controlled by hardware
FETOVRD, FETCTRL
1 = BATTFET controlled by the state of the FETCTRL bit
FETOCTRL: 0 = BATTFET is driven high if FETOVRD is set
1 = BATTFET is driven low if FETOVRD is set
Reverse mode enabling
0 = Reverse mode disabled
1 = Reverse mode enabled
RVRSMODE
Power limiter setting and disabling
PLIMDIS: 0 = Power limiter enabled
1 = Power limiter disabled
PLIM[1:0], PLIMDIS
Charge LED indicator enabling
0 = CHRGLED disabled
1 = CHRGLED enabled
CHRGLEDEN
CHGRESTART
CHGAUTOB
CHGAUTOVIB
CYCLB
Charger state machine restart
Selects between standalone or software controlled charging operation
0 = Standalone charging
1 = Software controlled charging
Allows for SPI control over-voltage and current settings in standalone charging mode
Controls charging resume behavior
0 = Enables cycling
1 = Disables cycling
Interrupt and Status bits
CHGDETI
Charger attach
CHGFAULTI
CHGFAULTS[1:0]
CHGENS
CHRGRAW over-voltage, excessive power dissipation, timeout, battery out of temperature range
Charger fault mode sense bits
Charger enable sense bit
USBOVI
USB over-voltage
CHGSHORTI
CHGREVI
Short-circuit detection in reverse mode
Charger path reverse current, detection based on CHGCURR threshold
Charge current threshold, detection based on CHGCURR threshold
Charger path regulation mode, detection based on BATTCYCL threshold
Wall Charger Detect
CHGCURRI
CCCVI
CHRGSE1BI
CHRGSE1BS
CHRGSSS
CHRSE1B pin sense
Charger configuration sense, serial versus single. A logic 1 indicates a serial path.
Thresholds
CHRGISNS-BPSNS at 35 mA flowing into phone, used for end of charge detection, charger removal and
charge current reversal
CHGCURR
BATT at 3.0 V, used to increase charge current (40/80 mA and 80/560 mA), detect a dead battery insertion
while charging
BATTMIN
BPON
BP at 3.2 V, used to allow turn on when charging from USB, closes M3 when in serial path
BATT at 3.4 V, used to allow turn on when charging from USB, closes M3 when in serial path
BPSNS at 98% of charger voltage setting, used to restart charging, used by CCCVI
BATTON
BATTCYCL
13892
Analog Integrated Circuit Device Data
Freescale Semiconductor
89
FREESCALE [ Freescale ]
