5.4.4.2.3 Color Look-Up Table (CLUT)

The GFX2D module includes two CLUTs. Each CLUT includes 256 entries containing 32 bits. Each entry contains a 32-bpp ARGB color.

Table 5-96. Color Look-Up Table Entry
Mem. addr.	0x3								0x2								0x1								0x0
Bit	31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Color entry	A								R								G								B

The CLUT can be loaded using an LDR instruction with the LDRC bit set. The LDRCID bit indicates the targeted CLUT. The LDRCS bit provides the amount of data to be loaded. Using a reduced CLUT mapping (i.e., 16 entries) reduces the number of accessible colors but improves loading time. The data structure is loaded from a memory location defined by the address in the REG field.