S1D13503 Epson Electronics America, Inc., S1D13503 Datasheet - Page 122

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

Page 26
3.2.4 Four Gray Shades (Two Bits/Pixel in Monochrome Mode)
S1D13503
X18A-G-002-06
When the S1D13503 is configured for two bit pixels in monochrome mode, each pixel can index one of four monochrome
LUT entries. Note that in monochrome mode, the S1D13503 uses the green LUT as the monochrome LUT. The 16 LUT
entries are divided into four separate Look-Up tables or banks, each having four entries (see Figure 5). The following
examples show how to program and select these banks.
Example 6:
1.
2.
3.
4.
5.
Determine location of bank 2 in LUT.
The first four entries in the 16 entry LUT represent the first bank (bank 0). The following four entries in the LUT rep-
resent the second bank (bank 1), etc. Consequently bank 2 starts at LUT index 8 as shown below:
Monochrome (green) Bank 2 is shown in Figure 5.
Write LUT index to Look-Up Table Address Register AUX[0Eh].
For bank 2, the index will one of the following values: 08h, 09h, 0Ah, or 0Bh
Write LUT entry value to Look-Up Table Data Register AUX[0Fh].
For a linear LUT, use the Look-Up table entries in Table 3-8, “S1D13503 Black-To-White Look-up Table For 4 Gray
Shades,” on page 26.
Repeat steps 2 and 3 until all 4 LUT entries have been written.
To display data using Bank 2, write 10b to AUX[0E] bits 7,6.
In 4 gray shade mode, program bank 2 LUT entries and select for use.
Table 3-8: S1D13503 Black-To-White Look-up Table For 4 Gray Shades
start of bank index
start of bank 2
Index
(hex)
A
B
8
9
=
=
bank number 4
2 4
=
Look-Up
Table
8
(hex)
A
F
0
5
Epson Research and Development
Programming Notes and Examples
Vancouver Design Center
Issue Date: 01/01/30