BQ29330 Datasheet, PDF (21/26 Pages) Texas Instruments – 2-,3-,AND 4-CELL LITHIUM-ION OR LITHIUM-POLYMER BATTERY PROTECTION AFE

bq29330
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FUNCTION_CONTROL : Function control register
SLUS673A – SEPTEMBER 2005 – REVISED DECEMBER 2005
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
0
0
1
1
CELL0
0
1
0
1
SELECTED CELL
VC4-VC5, Bottom series element (default)
VC4-VC3, Second lowest series element
VC3-VC2, Second highest series element
VC1-VC2, Top series element
CELL_SEL b2-b3 (CAL1, CAL0): These bits determine the mode of the voltage monitor block
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