SNLS477B October 2014 – November 2018 DS90UB948-Q1
The user must load all 3 LUTs prior to enabling the white balance feature. The following sequence must be followed by the user.
To initialize white balance after power-on:
An option does exist to allow LUT reloading after power-on and initial LUT loading (as previously described). This option may only be used after enabling the white-balance reload feature via the associated serial control bus register. In this mode the LUTs may be reloaded by the master controller via I2C. This provides the user with the flexibility to refresh LUTs periodically, or upon system requirements, to change to a new set of LUT values. The host controller loads the updated LUT values via the serial bus interface. There is no need to disable the white balance feature while reloading the LUT data. Refreshing the white balance to the new set of LUT data is seamless — no interruption of displayed data.
Note that initial loading of LUT values requires that all 3 LUTs be loaded sequentially. When reloading, partial LUT updates may be made; the LUT cannot be read.