Datasheet

bq29330

www.ti.com

SLUS673E –SEPTEMBER 2005–REVISED MARCH 2012

FUNCTION_CONTROL : Function control register

FUNCTION_CTL REGISTER (0x03)

7 6 5 4 3 2 1 0

0 0 0 0 TOUT BAT PACK VMEN

The FUNCTION_CONTROL register enables and disables features of the bq29330.

FUNCTION_CONTROL b0 (VMEN): This bit enables or disables the cell and battery voltage monitoring

function.

0 = Disable voltage monitoring (default). CELL output is pulled down to GND level.

1 = Enable voltage monitoring

FUNCTION_CONTROL b1 (PACK): This bit is used to translate the PACK input to the CELL+, CELL– pins

when VMEN = 1. The PACK input voltage is divided by 18 and is presented on CELL+, CELL– pins regardless

of the CELL_SEL register settings.

0 = CELL_SEL (b0, b1) settings determine CELL+, CELL– output when VMEN = 1(default).

1 = PACK input translated to CELL output regardless of CELL_SEL (b0, b1) selection when VMEN=1

FUNCTION_CTL b2 (BAT): This bit is used to translate the BAT input to the CELL+, CELL– pins when

VMEN=1. The VC5 input voltage is divided by 18 and is presented on CELL+, CELL– regardless of the

CELL_SEL register settings.

0 = CELL_SEL (b0, b1) settings determine CELL+, CELL– output when VMEN = 1(default).

1 = BAT input translated to CELL+, CELL– output regardless of CELL_SEL (b0, b1) selection when

VMEN = 1

This bit priority is higher than PACK(b1).

FUNCTION_CONTROL b3 (TOUT): This bit controls the power to the thermistor.

0 = Thermistor power is off (default).

1 = Thermistor power is on.

CELL_SEL : Cell select register

CELL_SEL REGISTER (0x04)

7 6 5 4 3 2 1 0

CB3 CB2 CB1 CB0 CAL1 CAL0 CELL1 CELL0

This register determines cell selection for voltage measurement and translation, cell balancing, and the

operational mode of the cell voltage monitoring.

CELL_SEL b0–b1 (CELL0–CELL1): These two bits select the series cell for voltage measurement translation.

CELL1 CELL0 SELECTED CELL

0 0 VC4–VC5, Bottom series element (default)

0 1 VC4–VC3, Second lowest series element

1 0 VC3–VC2, Second highest series element

1 1 VC1–VC2, Top series element

Product Folder Link(s): bq29330