S1D13503 Epson Electronics America, Inc., S1D13503 Datasheet - Page 115

• Manufacturer Part Number: S1D13503
• Description: S1d13503 Graphics Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
3.1.3 Memory Organization for Four Bit Pixels (16 Colors/Gray Shades)
3.1.4 Memory Organization for Eight Bit Pixels (256 Colors)
Programming Notes and Examples
Issue Date: 01/01/30
Bit 7
Pixel 0
Bit 3
Bit 7
Red Bit 2
To store four bit pixels, two pixels are grouped into one byte of display memory as shown below:
When these pixels are shown, Pixel 0 is seen to be left of Pixel 1. For color panels, each four bit pixel represents an index
into the red, green, and blue LUTs. For monochrome panels, each four bit pixel represents an index into the green LUT.
To store eight bit pixels, one pixel is stored in one byte of display memory as shown below:
As shown above, the 256 color pixel is divided into three parts: three bits for red, three bits for green, and two bits for blue.
The red bits represent an index into the red LUT, the green bits represent an index into the green LUT, and the blue bits
represent an index into the blue LUT. Eight bit pixels are only available in color panels.
Bit 6
Pixel 0
Bit 2
Bit 6
Red Bit 1
Figure 3: Pixel Storage For 4 Bits (16 Colors/gray Shades) In One Byte Of Display Memory
Figure 4: Pixel Storage For 8 Bits (256 Colors) In One Byte Of Display Memory
Bit 5
Pixel 0
Bit 1
Bit 5
Red Bit 0
Bit 4
Pixel 0
Bit 0
Bit 4
Green Bit 2
Bit 3
Pixel 1
Bit 3
Bit 3
Green Bit 1
Bit 2
Pixel 1
Bit 2
Bit 2
Green Bit 0
Bit 1
Pixel 1
Bit 1
Bit 1
Blue Bit 1
Bit 0
Pixel 1
Bit 0
Bit 0
Blue Bit 0
X18A-G-002-06
S1D13503
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