ST7715
9.7 Data Color Coding
9.7.1 8-bit Parallel Interface (IM2, IM1, IM0= “100”)
Different display data formats are available for three Colors depth supported by listed below.
- 4k colors, RGB 4,4,4-bit input.
- 65k colors, RGB 5,6,5-bit input.
- 262k colors, RGB 6,6,6-bit input.
9.7.2 8-bit data bus for 12-bit/pixel (RGB 4-4-4-bit input), 4K-Colors, 3AH= “03h”
RESX “1 ”
IM[2:0] “100”
CSX
D/CX
WRX
“1”
RDX
D7
0
D6
0
D5
1
D4
0
D3
1
D2
1
D1
0
D0
0
R1, Bit 3
R1, Bit 2
R1, Bit 1
R1, Bit 0
G1, Bit 3
G1, Bit 2
G1, Bit 1
G1, Bit 0
Pixel n
12 bits
B1, Bit 3
8080-series control pins
G2, Bit 3
R3, Bit 3
B1, Bit 2
G2, Bit 2
R3, Bit 2
B1, Bit 1
G2, Bit 1
R3, Bit 1
B1, Bit 0
G2, Bit 0
R3, Bit 0
R2, Bit 3
B2, Bit 3
G3, Bit 3
R2, Bit 2
B2, Bit 2
G3, Bit 2
R2, Bit 1
B2, Bit 1
G3, Bit 1
R2, Bit 0
B2, Bit 0
G3, Bit 0
Pixel n+1
12 bits
Look-up table for 4096 color data mapping (12 bits to 18 bits)
18 bits
Frame memory R1 G1 B1 R2 G2 B2 R3 G3 B3
Note1. The data order is as follows, MSB=D7, LSB=D0 and picture data is MSB=Bit 3, LSB=Bit 0 for Red, Green and Blue data.
Note 2: 3-time transfer is used to transmit 1 pixel data with the 12-bit color depth information.
Note 3: ‘-‘ = Don't care - Can be set to '0' or '1'
V1.5
37
2009-12-04