Rainbow Electronics W90P710CDG - Manual (Page 283)

W90P710CD/W90P710CDG
Publication Release Date: September 19, 2006
- 283 - Revision B2
N BPP W (WORD)
1 BPP (Black / White) X % 32
2 BPP (4 gray-level) X % 16
4 BPP (16 gray-level) X % 8
8 BPP ( RGB 332) X % 4
12 BPP (RGB 444) X % 2
16 BPP (RGB 565) X % 2
18 BPP (RGB 666) X % 1
24 BPP (RGB 888) X % 1
The first limitation is W must be a integer. The second limitation is W must be a multiple of 8 for Color
STN panel. W can be a multiple of 4, 8 or 16 for other kind of panel. If W is a multiple of 4, the register
value of F1BURSTY (FIFO1PRM register) must be set to 00. If W is a multiple of 8, the register value
of F1BURSTY (FIFO1PRM register) must be set to 01. If W is a multiple of 16, the register value of
F1BURSTY (FIFO1PRM register) must be set to 10.
If there is a picture with N BPP and horizontal width X pixel which is not following the limitation, define
R is quotient of W, and S is quotient of R % 16. Then the value of F1COLCNT (F1DREQCNT register)
can be set to D = (S + 1) * 16, DISPWXE can be set to X. Define E = D * 4. When software is writing
the picture raw data into SDRAM and reach the address of X * 4, software must jump to address E + 1
and then keep on writing data.
6.10.3.5 Color Generation
Video Lookup Table Entry Index 1 Register (VDLUTENTY1)
REGISTER ADDRESS R/W DESCRIPTION RESET VALUE
VDLUTENTY1 0xFFF0_8050 R/W Video lookup table entry index 1 0x0000_0000
31 30 29 28 27 26 25 24
VDLUTENTY1[31:24]
23 22 21 20 19 18 17 16
VDLUTENTY1[23:16]
15 14 13 12 11 10 9 8
VDLUTENTY1[15:8]
7 6 5 4 3 2 1 0
VDLUTENTY1[7:0]