Philips S1D13505 Manual De Usuario

Page 22

Epson Research and Development

Vancouver Design Center

S1D13505

Programming Notes and Examples

X23A-G-003-07

Issue Date: 01/02/05

Color Modes

In color display modes, depending on the color depth, 2 through 256 index entries are used.
The selection of which entries are used is automatic.

1 bpp color

When the S1D13505 is configured for 1 bpp color mode, the LUT is limited to the first two
entries. The two LUT entries can be any two RGB values but are typically set to black-and-
white.

Each byte in the display buffer contains 8 bits, each pertaining to adjacent pixels. A bit
value of '0' results in the LUT 0 index value being displayed. A bit value of '1' results in the
LUT 1 index value being displayed.

The following table shows the recommended values for obtaining a black-and-white mode
while in 1 bpp on a color panel.

2 bpp color

When the S1D13505 is configured for 2 bpp color mode only the first 4 entries of the LUT
are used. These four entries can be set to any desired values.

Each byte in the display buffer contains 4 adjacent pixels. Each pair of bits in the byte are
used as an index into the LUT. The following table shows example values for 2 bpp color
mode.

Table 4-2: Recommended LUT Values for 1 Bpp Color Mode

Index

Red

Green

Blue

...

= Indicates unused entries in the LUT

Table 4-3: Example LUT Values for 2 Bpp Color Mode

Index

Red

Green

Blue

...

= Indicates unused entries in the LUT