STBC21 Datasheet, PDF (47/54 Pages) STMicroelectronics – LI+ battery charger with thermal regulation

STBC21
Charger, battery and alarm status registers
Appendix H Charger, battery and alarm status registers
Table 41. Address: 11H, Reset state: 00000000
Bit
Name
Read/Write
Function
B7(MSB)
VCC_uvlo
Read
1: VCC undervoltage protection, valid only after initialization.
Cleared at reset or sw_alarms_clr=Reg13H(5).
B6
VCC_ovp
Read
1: VCC over protection. Cleared at reset or sw_alarms_clr.
B5
IBAT_ocp
Read
1: IBAT over protection. Cleared at reset or sw_alarms_clr.
B4
Batt_ovp
Read
1: Battery overvoltage protection always active. Cleared at
battery disconnection or sw_alarms_clr, disabled by
Reg19H(6).
B3
Batt_uvlo
B2
Batt_hot
Read
Read
1: Battery undervoltage protection valid only in fast-charge.
Cleared at battery disconnection or sw_alarms_clr.
1: Battery temperature too high. Cleared at battery
disconnection or sw_alarms_clr.
B1
Batt_detect_KO
Read
1: Battery detection failed. Cleared at battery disconnection
or sw_alarms_clr.
B0(LSB) Batt_no_conn
Read
1: Battery disconnected
Table 42. Address: 12H, Reset state: 00000000
Bit
Name
Read/Write
Function
B7(MSB)
ASD_mode
Read
1: Automatic shutdown mode.
B6
Thermal protection
B5
Batt_temp_alarm
(T>60 ºC)
Read
Read
1: Chip temperature over 115 ºC.
1: Battery temp. is out of range during charge. At the first
occurrence it can be cleared if the battery temp. returns
again in a good range; after the first one, a battery
disconnection or sw_alarms_clr is needed.
B4
Batt_temp_alarm
(T>60 ºC or T<0 °C)
Read
1: Battery temp. is out of range during charge. Cleared if
battery temp. returns in a good range or at battery
disconnection or sw_alarm_clr.
B3
Batt_temp_soc
(at batt. insertion)
Read
1: Battery temp. is out of range at start of charge (battery
connection). Cleared at battery disconnection or
sw_alarms_clr or when temperature returns in good range.
B2
Timer2_expired
Read
1: Timer2 expired. Active only during fast-charge. Cleared
at battery disconnection or sw_alarms_clr.
B1
B0(LSB)
Timer1_expired
0 V-Chrg_alarm
Read
Read
1: Timer1 expired. Active only during pre-charge. Cleared
at battery disconnection or sw_alarms_clr.
1: Timer4 expired and battery still under 1 V. Cleared at
battery disconnection or sw_alarms_clr.
Doc ID 023256 Rev 1
47/54