bq29330
www.ti.com
SLUS673A – SEPTEMBER 2005 – REVISED DECEMBER 2005
SAFETY STATE DIAGRAM
LEGEND:
UVLO = Undervoltage Lock Out
KEY:
Disabled = OFF and cannot be changed via firmware
Enabled= Can be changed by firmware
No Power Supply
Power Supply to PACK
Power Supply to PACK
UVLO Mode
CHG: OFF
DSG: OFF
ZVCHG: OFF
VREG: OFF
RST: HIGH
I2 C: Disabled
Current Protection: Disabled
VCELL: Disabled
Watchdog: Disabled
Therm, Output: Disabled
Ship Mode
CHG: OFF
DSG: OFF
ZVCHG: OFF
VREG/VLED: OFF/OFF
I
2
C: Disabled
Current Protection: Disabled
VCELL: Disabled
Watchdog: Disabled
Therm, Output: Disabled
Internal V
LED> 2.4 V
Internal
VLED < 2.3 V
Firmware
Command
Firmware Command
& No Supply to PACK
No supply PACK
DSG: Mode
voltage OFF
DSG: OFF
32 kHz Resumes
FirmwareCommand
Normal Mode
CHG: ON
DSG: ON
ZVCHG: OFF
VREG/VLED: 2.5V/3.3V
RST: Driven low after
t
RST
I2 C: Enabled
Current Protection: Enabled
VCELL: Enabled
Watchdog: Enabled
Therm, Output: Enabled
Firmware
Command
Firmware
Command
Sleep Mode
Firmware
Command
CHG: OFF
DSG: OFF
ZVCHG: OFF
VREG/VLED: ON/ON
I2 C: Enabled
Current Protection: Enabled
VCELL: Enabled
Watchdog: Enabled
Therm, Output: Disabled
32 kHz Input Halted
and t WTO expired
Firmware
Command
WTO Mode
CHG: OFF
DSG: OFF
ZVCHG: OFF
VREG/VLED: 2.5 V/3.3 V
RST: Pulsed
I2 C: Enabled
Current Protection: Enabled
VCELL: Enabled
Watchdog: Enabled
Therm, Output: Enabled
V
SR
> V
OL
or V
SCD
for a period of t
OL
or t
SCD
Respectively, or V
SR
> V
SCC
for a period
of t
SCC
32 kHz Input Halted
and tWTO expired
Current Protection Mode
CHG: OFF
DSG: OFF
ZVCHG: OFF
VREG/VLED: 2.5 V/3.3 V
I2 C: Enabled
Current Protection: Enabled
VCELL: Enabled
Watchdog: Enabled
Therm, Output: Enabled
5
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