13892 datasheet(89/161 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

13892

FUNCTIONAL DEVICE OPERATION

BATTERY INTERFACE AND CONTROL

Table 61. Main Control Bit Signals

Name

Description

Control Bits

VCHRG[2:0]

Charger regulator voltage setting

ICHRG[3:0]

Charger regulator current setting

TREN

Internal trickle charger enabling

THCHKB

Battery thermistor check disable

FETOVRD, FETCTRL

SPI control over BATTFET pin (M3)

FETOVRD: 0 = BATTFET output are controlled by hardware

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

RVRSMODE

Reverse mode enabling

0 = Reverse mode disabled

1 = Reverse mode enabled

PLIM[1:0], PLIMDIS

Power limiter setting and disabling

PLIMDIS: 0 = Power limiter enabled

1 = Power limiter disabled

CHRGLEDEN

Charge LED indicator enabling

0 = CHRGLED disabled

1 = CHRGLED enabled

CHGRESTART

Charger state machine restart

CHGAUTOB

Selects between standalone or software controlled charging operation

0 = Standalone charging

1 = Software controlled charging

CHGAUTOVIB

Allows for SPI control over-voltage and current settings in standalone charging mode

CYCLB

Controls charging resume behavior

0 = Enables cycling

1 = Disables cycling

Interrupt and Status bits

CHGDETI

Charger attach

CHGFAULTI

CHRGRAW over-voltage, excessive power dissipation, timeout, battery out of temperature range

CHGFAULTS[1:0]

Charger fault mode sense bits

CHGENS

Charger enable sense bit

USBOVI

USB over-voltage

CHGSHORTI

Short-circuit detection in reverse mode

CHGREVI

Charger path reverse current, detection based on CHGCURR threshold

CHGCURRI

Charge current threshold, detection based on CHGCURR threshold

CCCVI

Charger path regulation mode, detection based on BATTCYCL threshold

CHRGSE1BI

Wall Charger Detect

CHRGSE1BS

CHRSE1B pin sense

CHRGSSS

Charger configuration sense, serial versus single. A logic 1 indicates a serial path.

Thresholds

CHGCURR

CHRGISNS-BPSNS at 35 mA flowing into phone, used for end of charge detection, charger removal and

charge current reversal

BATTMIN

BATT at 3.0 V, used to increase charge current (40/80 mA and 80/560 mA), detect a dead battery insertion

while charging

BPON

BP at 3.2 V, used to allow turn on when charging from USB, closes M3 when in serial path

BATTON

BATT at 3.4 V, used to allow turn on when charging from USB, closes M3 when in serial path

BATTCYCL

BPSNS at 98% of charger voltage setting, used to restart charging, used by CCCVI

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