Datasheet

bq24270
bq24271
SLUSB10 –JUNE 2012 www.ti.com
Figure 12. Bus Protocol
REGISTER DESCRIPTION
Status and Control Register (READ/WRITE)
Memory location: 00, Reset state: 0xxx 0xxx
BIT NAME Read/Write FUNCTION
Write: TMR_RST function, write “1” to reset the watchdog timer (auto clear)
B7(MSB) TMR_RST Read/Write
Read: Always 0
B6 STAT_2 Read only 000- No Valid Source Detected
001- NA
B5 STAT_1 Read only
010- USB Ready
011-NA
100- Charging from USB
B4 STAT_0 Read only
101- Charge Done
110- NA
111- Fault
B3 NA Read/Write NA
B2 FAULT_2 Read only 000-Normal
001- Thermal Shutdown
B1 FAULT_1 Read only
010- Battery Temperature Fault
011- Watchdog Timer Expired (bq24270/1 only)
100- Safety Timer Expired (bq24270/1 only)
B0(LSB) FAULT_0 Read only
101- NA
110- USB Supply Fault
111- Battery Fault
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