Datasheet

bq24272
SLUSB09 –JUNE 2012 www.ti.com
Table 1. STAT Pin Summary
CHARGE STATE STAT AND INT BEHAVIOR
Charge in progress and EN_STAT=1 Low
Other normal conditions High-Impedance
Status Changes: Supply Status Change (plug in or removal), safety timer fault, watchdog
expiration, sleep mode, battery temperature fault (TS), battery fault (OVP or absent), 128-µs pulse, then High Impedance
thermal shutdown
REGISTER DESCRIPTION
Status/Control Register (READ/WRITE)
Memory location: 00, Reset state: 0xxx 0xxx
BIT NAME Read/Write FUNCTION
B7(MSB) TMR_RST Read/Write Write: TMR_RST function, write “1” to reset the watchdog timer (auto clear)
Read: Always 0
B6 STAT_2 Read only 000- No Valid Source Detected
001- IN Ready
B5 STAT_1 Read only
010- NA
B4 STAT_0 Read only
011- Charging
100-
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
100- Safety Timer Expired
101- Supply Fault
110- NA
111- Battery Fault
Battery/ Supply Status Register (READ/WRITE)
Memory location: 01, Reset state: xxxx 0xxx
BIT NAME Read/Write FUNCTION
B7(MSB) STAT1 Read Only 00-Normal
01-Supply OVP
B6 STAT0 Read Only
10-Weak Source Connected (No Charging)
11- V
IN
<V
UVLO
B5 NA Read Only NA
B4 NA Read Only NA
B3 NA Read/Write NA
B2 BATSTAT1 Read Only 00-Battery Present and Normal
01-Battery OVP
B1 BATSTAT0 Read Only
10-Battery Not Present
11- NA
B0 (LSB) EN_NOBATO Read/ Write 0-Normal Operation
P
1-Enables No Battery Operation when termination is disabled
(default 0)
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