26 LCD CONTROLLER (LCDC)
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
26-19
Example
VRAM start address: 0x10000000
Screen width:
320 pixels
LUT:
Bypassed
LCD characteristics: Data = 0
→
Low LCD brightness
Display image
Coordinates
(0, 0)
320 pixels
VRAM data
Address
0x1000 0000
0x1000 01e0
0x1000 03c0
:
0x00 0x00 0xf0 0xf0 0xf0 0x00 .....
0xff 0xff 0x0f 0x0f 0x0f 0xff .....
0x00 0x50 0x55 0xaa 0xfa 0xff .....
: : : : : :
480 bytes / line
Note) Display may be inverted depending on the LCD panel used.
5.5.10 Example of VRAM Data in 12-bpp Mode
Figure 26.
16-bpp mode (64K colors for TFT, 4K colors for CSTN)
In 16-bpp mode, each 2-byte data in the VRAM corresponds to one pixel. The bit[15:11] (5 bits), bit[10:5] (6
bits), and bit[4:0] (5 bits) in each 16-bit data represent the Red, Green, and Blue intensities, respectively, of the
pixel. This mode does not support the look-up table.
(0,0)
(1,0)
(2,0)
(3,0)
(4,0)
(5,0)
(6,0)
(7,0)
R4 R3 R2 R1 R0 G5 G4 G3
G5 G4 G3
G2 G1 G0 B4 B3 B2 B1 B0
G2 G1 G0 B4 B3 B2 B1 B0
LCD
I/F
VRAM
Display start address
Byte address offset
16 bit / 1 pixel
LUT bypassed
FPDAT signals
Byte 1
Byte 0
R4 R3 R2 R1 R0
Short
(x, y)
MSB
LSB
MSB
LSB
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15
Figure 26.5.5.11 VRAM Data Format in 16-bpp Mode
Example
VRAM start address: 0x10000000
Screen width:
320 pixels
LUT:
Bypassed
LCD characteristics: Data = 0
→
Low LCD brightness
Display image
Coordinates
(0, 0)
320 pixels
VRAM data
Address
0x1000 0000
0x1000 0280
0x1000 0500
:
0x00 0x00 0x00 0xf8 0xe0 0x07 0x1f 0x00 .....
0xff 0xff 0xff 0x07 0x1f 0xf8 0xe0 0xff .....
0x00 0x00 0xaa 0x52 0x55 0xad 0xff 0xff .....
: : : : : : : :
640 bytes / line
Note) Display may be inverted depending on the LCD panel used.
5.5.12 Example of VRAM Data in 16-bpp Mode
Figure 26.
Note: The LCDC supports up to 4K colors for CSTN panels even if 16-bpp mode is selected.