S1D13503 Epson Electronics America, Inc., S1D13503 Datasheet - Page 121

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

Epson Research and Development
Vancouver Design Center
3.2.3 Black-and-White (One Bit/Pixel)
Programming Notes and Examples
Issue Date: 01/01/30
Example 5:
This example shows how to invert an image by changing only the LUT. Inverting means that pixels formally shown as light
gray shades are now shown as dark gray shades, and vise versa. It does not matter whether the S1D13503 is in 4 gray shade
or 16 gray shade mode.
1.
2.
3.
4.
If Table 3-6 was previously programmed into the S1D13503, the new inverted LUT would be the following:
When the S1D13503 is configured for one bit pixels, the monochrome (green) LUT is not used. Instead, a pixel value of 0
represents black and a pixel value of 1 represents white.
Note
One bit/pixel is only available in monochrome mode.
Read LUT entry.
Write LUT index to Look-Up Table Address Register AUX[0Eh]
Read “Old LUT Entry” from Look-Up Table Data Register AUX[0Fh]
Calculate “New LUT Entry” according to the following formula:
Write LUT entry back.
Write LUT index to Look-Up Table Address Register AUX[0Eh]
Write “New LUT Entry” to Look-Up Table Data Register AUX[0Fh]
Repeat steps 1 to 3 until all 16 LUT entries have been changed.
Initialize an Inverted Look-Up Table
Table 3-7: S1D13503 Inverted Look-Up Table (White-To-Black)
Index
(hex)
0
1
2
3
4
5
6
7
New LUT Entry
Look-Up
Table
(hex)
D
C
B
A
F
E
9
8
=
15 Old LUT Entry
–
Index
(hex)
A
D
B
C
E
8
9
F
Look-Up
Table
(hex)
7
6
5
4
3
2
1
0
X18A-G-002-06
S1D13503
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