SLUUCW4 November 2023 BQ27Z558
Manufacturer Access (MAC) commands are defined by Texas Instruments. MAC commands require a write to the AltManufacturerAccess() registers at 0x3E and 0x3F, and then an additional write to the AltManufacturerAccess() sub-command being used. The complete list of all MAC commands in the BQ27Z558 and an example of a Command Write operation with MAC commands can be found in the 0x00, 0x01 ManufacturerAccess() and 0x3E, 0x3F AltManufacturerAccess() chapter of the BQ27Z558 Technical Reference Manual located on ti.com.
Example: Read Chemical ID() to AltManufacturerAccess().
Figure 4-4 shows this in bqStudio. To perform this process, fill out all of the fields as shown, then click Write and Read.