BQ25872 Datasheet, PDF (28/68 Pages) Texas Instruments – Battery Switch Charger

bq25872
SLUSCQ6 – OCTOBER 2016
www.ti.com
8.4 Device Functional Modes
The device is a host controlled device. After power-on-reset, all the registers are in the default settings. All the
device parameters can be programmed by the host. Writing 1 to REG 06 [0] will reset all registers to default
setting. When watchdog timer expires, charge enable bit (REG06 [4]) and ADC enable bit (REG07 [3]) will be
reset to default settings. To prevent watchdog timer expiring, the host has to read or write any register before the
watchdog timer expires, or disable watchdog timer by setting REG06 [3:2] = 00.
POR
Watchdog timer expired
Reset registers
I2C interface enabled
I2C Write?
Y
Start Watchdog timer
Host programs registers
Reset Watchdog Timer
Reset REG 06 bit [4]
REG 07 bit [3]
Reset REG 06
Y
bit[0]
Y
N
Watchdog Timer Expired?
Figure 20. Operation Mode
28
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