S1D13705 Epson Electronics America, Inc., S1D13705 Datasheet - Page 106

• Manufacturer Part Number: S1D13705
• Description: S1d13705 Embedded Memory Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Page 14
3.4 Eight Bit-Per-Pixel (256 Colors)
S1D13705
X27A-G-002-02
Red bit 2
Bit 7
Red bit 1
Figure 3-4: Pixel Storage for 8 Bpp (256 Colors) in One Byte of Display Buffer
Bit 6
In eight bit-per-pixel mode one byte of display buffer represents one pixel on the display.
At this color depth the read-modify-write cycles, required by the lessor pixel depths, are
eliminated.
When using a color panel, each byte of display memory acts as and index to one element
of the LUT. The displayed color is arrived at by taking the display memory value as an
index into the LUT.
Eight bit per pixel is not supported for monochrome display modes. The reason is that each
element of the LUT supports a 4-bit (sixteen value) level for red, green and blue. In
monochrome display modes on the green value is used to set the gray intensity. Thus we
have sixteen possible grey values but, because of the color
.
Red bit 0
Bit 5
Green bit 2
Bit 4
Green bit 1
Bit 3
Green bit 0
Bit 2
Epson Research and Development
Programming Notes and Examples
Blue bit 1
Bit 1
Vancouver Design Center
Issue Date: 01/02/13
Blue bit 0
Bit 0