S1D13505 Epson Electronics America, Inc., S1D13505 Datasheet - Page 173

• Manufacturer Part Number: S1D13505
• Description: LCD Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
3.1.6 Memory Organization for Sixteen Bit-Per-Pixel (65536 Colors/16 Gray Shades)
Programming Notes and Examples
Issue Date: 01/02/05
Bit 15
Red Bit 4
Bit 7
Green Bit 2
Figure 3-6: Pixel Storage for 16 Bpp (65536 Colors/16 Gray Shades) in Two Bytes of Display Buffer
Bit 14
Red Bit 3
Bit 6
Green Bit 1
In 16 bit-per-pixel mode the S1D13505 is capable of generating 65536 colors. The 65536
color pixel is divided into three parts: five bits for red, six bits for green, and five bits for
blue. In this mode the Look-Up Table is bypassed and output goes directly into the Frame
Rate Modulator.
The full color range is only available on TFT/D-TFD or CRT displays. Passive LCD
displays are limited to using the four most significant bits from each of the red, green and
blue portions of each color. The result is 4096 (2
When monochrome mode is selected, the green component of the LUT is used to determine
the gray shade intensity. The green indices, with only four bits, can resolve 16 gray shades.
In this situation one might as well use four bit-per-pixel mode and conserve display buffer.
Bit 13
Red Bit 2
Bit 5
Green Bit 0
Bit 12
Red Bit 1
Bit 4
Blue Bit 4
Bit 11
Red Bit 0
Bit 3
Blue Bit 3
Bit 10
Green Bit 5
Bit 2
Blue Bit 2
4
* 2
4
* 2
4
) possible colors.
Bit 9
Green Bit 4
Bit 1
Blue Bit 1
Bit 8
Green Bit 3
Bit 0
Blue Bit 0
X23A-G-003-07
S1D13505
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