BQ29312_15 Datasheet, PDF (20/39 Pages) Texas Instruments – FOUR CELL LITHIUM-ION

bq29312
SLUS546E – MARCH 2003 – REVISED MARCH 2005
CELL SEL: Cell Select Register
7
6
5
CB3
CB2
CB1
CELL_SEL REGISTER (0x04)
4
3
CB0
CAL1
2
CAL0
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1
CELL1
0
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.
CAL1
0
0
1
1
CAL0
0
1
0
1
SELECTED MODE
Cell translation for selected cell (default)
Offset measurement for selected cell
Monitor the V_REF value for gain calibration
Monitor the V_REF directly value for gain calibration, bypassing the translation circuit
CELL_SEL b4–b7 (CB0–CB3): These 4 bits select the series cell for cell balance bypass path.
CELL SEL b4 (CB0): This bit enables or disables the bottom series cell balance charge bypass path
0 = disable bottom series cell balance charge bypass path (default).
1 = enable bottom series cell balance charge bypass path.
CELL SEL b5 (CB1): This bit enables or disables the second lowest series cell balance charge bypass path.
0 = disable series cell balance charge bypass path (default).
1 = enable series cell balance charge bypass path.
CELL SEL b6 (CB2): This bit enables or disables the second highest cell balance charge bypass path.
0 = disable series cell balance charge bypass path (default).
1 = enable series cell balance charge bypass path.
CELL SEL b7 (CB3): This bit enables or disables the highest series cell balance charge bypass path.
0 = disable series cell balance charge bypass path (default).
1 = enable series cell balance charge bypass path.
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