SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The video pipeline supports a look up table to perform either of the following operations:
The look-up table consists of 3 separate 1024 x 10-bit memories and is indexed either by the source BITMAP data or by R/G/B component data. The table is loaded through direct register access by writing to the CLUT registers.
The sequence to load the table is:
SW needs to ensure that there is no visible effect when modifying the table, since it is not under hardware control.
The usage of the look-up table in CLUT mode is activated when a BITMAP format is selected in the DSS0_VID_ATTRIBUTES[6:1] FORMAT register bit-field.
The usage of the look-up table for RGB inverse gamma correction can be enabled by setting DSS0_VID_ATTRIBUTES[30] GAMMAINVERSION register bit.
Scaling and color look-up table features are mutually exclusive. If color look-up feature is enabled, then video pipeline scaler has to be disabled.