SLUSDQ4 April 2019 BQ79606A-Q1
Using post-assembly calibration adjustment can also improve the GPIO channel accuracy further after exposure to soldering and/or bake cycles in the manufacturing process. The process is the same as the steps for the VC* channel correction. Perform the correction procedures at room temperature (RT) using a stable, high-accuracy DC source and / or voltmeter. The registers contain 10-bit, signed, 2's-complement values. A zero value in any register indicates no correction. Each correction measures two voltage points. The procedure can use the expected minimum and maximum values for the cell. The gain values are updated in the GPIO*_GAIN registers and the offset values are updated in the GPIO*_OFF registers.