SLUUDA0A April 2026 – July 2026 BQ27Z855
All calibration steps that require accessing data on MACData() must begin read operations starting at AltManufacturerAccess() to ensure the data portion of the block is properly refreshed per the intended AltManufacturerAccess() subcommand (in this case 0xF081). The first two bytes returned are the AltManufacturerAccess() subcommand followed by the counter, status, and raw ADC values, as shown in AltManufacturerAccess() Descriptions.
The new calibration process is outlined in the release notes. This method does not require the host to calculate the calibration constants and send them to the device, the constants are automatically calculated and stored by the device upon command.