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SLUUBY1B December 2020 – April 2022 BQ76942

4.5 Subcommands 0x0071–0x0073 DASTATUS1-3(), Cell Voltage and Synchronized Current Counts

The 0x0071 DASTATUS1(), 0x0072 DASTATUS2(), and 0x0073 DASTATUS3() subcommands provide raw ADC counts in 32-bit format of the cell voltage measurements, as well as the synchronized current measurements taken simultaneously with each cell voltage measurement.

Note: Only 24-bit raw data is generated by the data converters, but it is provided in a 32-bit numerical format (the 24-bit data is contained in the lower 3 bytes of the 32-bit data, and is sign-extended to create the upper byte). The raw ADC data provided for cell voltage measurements uses a digital fullscale range of ± (5 × VREF1), although cell voltage measurements more negative than –0.2 V cannot practically be measured. The raw coulomb counter ADC data provided for current measurements uses a digital fullscale range of ± (VREF2 / 5).

The 32-bit cell voltage counts data has an LSB value of approximately 5 × V_REF1 / 2²³ ≅ 5 × 1.212 V / 2²³ ≅ 0.722 μV.

Note: This data was not processed using the internal factory gain and offset trim corrections, which are used for calculation of the 16-bit data provided by the Cell # Voltage() commands.

The 32-bit current counts data has an LSB value of approximately V_REF2 / (5 × 2²³) ≅ 1.24 V / (5 × 2²³) ≅ 29.56 nV.

Note: This data was not processed for gain or offset, which are used for calculation of the 16-bit current data provided by the CC2 Current() and CC3 Current() commands.

Table 4-4 shows further details.

Table 4-4 Cell Voltage and Synchronized Current Counts

Subcommand Address	Bytes Within Block	Name	Unit
0x0071	0–3	Cell 1 Voltage Cnts	ADC counts
	4–7	Cell 1 Current Cnts	ADC counts
	8–11	Cell 2 Voltage Cnts	ADC counts
	12–15	Cell 2 Current Cnts	ADC counts
	16–19	Cell 3 Voltage Cnts	ADC counts
	20–23	Cell 3 Current Cnts	ADC counts
	24–27	Cell 4 Voltage Cnts	ADC counts
	28–31	Cell 4 Current Cnts	ADC counts
0x0072	0–3	Cell 5 Voltage Cnts	ADC counts
	4–7	Cell 5 Current Cnts	ADC counts
	8–11	Cell 6 Voltage Cnts	ADC counts
	12–15	Cell 6 Current Cnts	ADC counts
	16–19	Cell 7 Voltage Cnts	ADC counts
	20–23	Cell 7 Current Cnts	ADC counts
	24–27	Cell 8 Voltage Cnts	ADC counts
	28–31	Cell 8 Current Cnts	ADC counts
0x0073	0–3	Cell 9 Voltage Cnts	ADC counts
	4–7	Cell 9 Current Cnts	ADC counts
	8–11	Cell 10 Voltage Cnts	ADC counts
	12–15	Cell10 Current Cnts	ADC counts
	16–31	Reserved	-