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L9963E Datasheet(PDF) 94 Page - STMicroelectronics |
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L9963E Datasheet(HTML) 94 Page - STMicroelectronics |
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94 / 184 page  Operation Skip condition C9-C8 VCELL9_EN = 0 C10-C9 VCELL10_EN = 0 C11-C10 VCELL11_EN = 0 C12-C11 VCELL12_EN = 0 C13-C12 VCELL13_EN = 0 C14-C13 VCELL14_EN = 0 The step duration is not fixed, since it lasts TCYCLEADC, thus depending on the value programmed in the ADC_FILTER_SOC or ADC_FILTER_CYCLE fields (refer to Table 38). The following failures can be flagged during cell conversion step execution, thus causing Configuration Override: • VCELLX_UV: if the voltage of the x-th cell is lower than the programmed UV threshold (VCELL_UV) • VCELLX_OV: if the voltage of the x-th cell is higher than the programmed OV threshold (VCELL_OV) • VSUM_OV: if summing all cells voltage the outcome is higher than the programmed OV threshold (VBAT_OV (SUM)) • VSUM_UV: if summing all cells voltage the outcome is lower than the programmed UV threshold (VBAT_UV (SUM)) • VCELLX_BAL_UV (maskable): if the voltage of the x-th cell is lower than the programmed balance UV threshold (VCELL_UV + VCELL_BAL_UV_ Δ) 4.12.3.2 VBAT conversion VBAT pin conversion is the second step of the voltage conversion routine. It is mandatory, meaning that it cannot be excluded from routine execution, neither in On-Demand Conversions nor in Cyclic Conversions. During this step, the voltage on VBAT pin will be converted. The step duration is not fixed, since it lasts TCYCLEADC, thus depending on the value programmed in the ADC_FILTER_SOC or ADC_FILTER_CYCLE fields (refer to Table 38). The following failures can be flagged during VBAT conversion step execution, thus causing Configuration Override: • VBATTCRIT_OV: if the voltage converted is higher than the VBAT_CRITICAL_OV_TH. • VBATTCRIT_UV: if the voltage converted is lower than the VBAT_CRITICAL_UV_TH. 4.12.3.3 GPIO conversion GPIO conversion is the third step of the voltage conversion routine. L9963E allows possible to provide either the absolute conversion or the ratiometric conversion with respect to VTREF_MEAS, based on GPIOx dedicated R/W SPI register bits ratio_abs_x_sel. This step is optional: • To include it in On-Demand Conversions, the GPIO_CONV bit must be set along with the SOC in the same SPI frame. • To specify its periodicity in Cyclic Conversions, the NCYCLE_GPIO field must be programmed (refer to Operations Periodicity). During this step, all the GPIO configured as analog inputs will be converted. Table 62. Operations performed during GPIO conversion step Operation Skip condition GPIO1 Always GPIO2 Always GPIO3 GPIO3_CONFIG != 00 L9963E Voltage conversion routine DS13636 - Rev 12 page 94/184 |
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