L9963E datasheet(96/184 Pages) STMICROELECTRONICS

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•

To specify its periodicity in Cyclic Conversions, the NCYCLE_CELL_TERM field must be programmed

(refer to Section 4.12.4 Operations periodicity).

During this step, the cell terminal open diagnostic will be performed on all enabled cells.

Table 64. Operations performed during cell terminal diagnostics step

Operation

Skip condition

C0 Open

VCELL1_EN = 0

C1 Open

VCELL1_EN = 0

C2 Open

VCELL2_EN = 0

C3 Open

VCELL3_EN = 0

C4 Open

VCELL4_EN = 0

C5 Open

VCELL5_EN = 0

C6 Open

VCELL6_EN = 0

C7 Open

VCELL7_EN = 0

C8 Open

VCELL8_EN = 0

C9 Open

VCELL9_EN = 0

C10 Open

VCELL10_EN = 0

C11 Open

VCELL11_EN = 0

C12 Open

VCELL12_EN = 0

C13 Open

VCELL13_EN = 0

C14 Open

VCELL14_EN = 0

The step duration is not fixed, since it lasts 2*(TCxOPEN_SET + TCYCLEADC), thus depending on the value

programmed in the ADC_FILTER_SOC or ADC_FILTER_CYCLE fields (refer to Table 38).

The following failure can be flagged during cell terminal diagnostics step execution, thus causing Configuration

Override:

•

CELLX_OPEN: for all enabled cells, if the voltage drop on the path in series to the Cx pin becomes higher

than VCxOPEN.

4.12.3.6

Balance terminal diagnostics

Balance terminal diagnostics is the sixth step of the voltage conversion routine. It is optional:

•

To include it in On-Demand Conversions, the BAL_TERM_CONV bit must be set along with the SOC in

the same SPI frame.

•

To specify its periodicity in Cyclic Conversions, the NCYCLE_BAL_TERM field must be programmed (refer

to Section 4.12.4 Operations periodicity).

During this step, the balance terminal open diagnostic will be performed on all the enabled cells.

Table 65. Operations performed during balance terminal diagnostics step

Operation

Skip condition

B2_1 – S1 Open / Short

VCELL1_EN = 0

S2 – B2_1 Open / Short

VCELL2_EN = 0

B4_3 – S3 Open / Short

VCELL3_EN = 0

S4 – B4_3 Open / Short

VCELL4_EN = 0

B6_5 – S5 Open / Short

VCELL5_EN = 0

S6 – B6_5 Open / Short

VCELL6_EN = 0

L9963E

Voltage conversion routine

DS13636 - Rev 12

page 96/184

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