STBC21 datasheet(47/54 Pages) STMICROELECTRONICS

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STBC21

Charger, battery and alarm status registers

Doc ID 023256 Rev 1

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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).

VCC_ovp

Read

1: VCC over protection. Cleared at reset or sw_alarms_clr.

IBAT_ocp

Read

1: IBAT over protection. Cleared at reset or sw_alarms_clr.

Batt_ovp

Read

1: Battery overvoltage protection always active. Cleared at

battery disconnection or sw_alarms_clr, disabled by

Reg19H(6).

Batt_uvlo

Read

1: Battery undervoltage protection valid only in fast-charge.

Cleared at battery disconnection or sw_alarms_clr.

Batt_hot

Read

1: Battery temperature too high. Cleared at battery

disconnection or sw_alarms_clr.

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.

Thermal protection

Read

1: Chip temperature over 115 ºC.

Batt_temp_alarm

(T>60 ºC)

Read

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.

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.

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.

Timer2_expired

Read

1: Timer2 expired. Active only during fast-charge. Cleared

at battery disconnection or sw_alarms_clr.

Timer1_expired

Read

1: Timer1 expired. Active only during pre-charge. Cleared

at battery disconnection or sw_alarms_clr.

B0(LSB)

0 V-Chrg_alarm

Read

1: Timer4 expired and battery still under 1 V. Cleared at

battery disconnection or sw_alarms_clr.

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