sed1374 ETC-unknow, sed1374 Datasheet - Page 115

• Manufacturer Part Number: sed1374
• Description: Sed1374 Embedded Memory Color Lcd Controller
• Manufacturer: ETC-unknow

Epson Research and Development
Vancouver Design Center
4.2 Look-Up Table (LUT) Organization
Programming Notes and Examples
Issue Date: 99/04/27
REG[17h] Look-Up Table Data Register
n/a
n/a
Display Mode
1 Bpp Color
2 Bpp Color
4 Bpp Color
8 Bpp Color
1 Bpp Gray
2 Bpp Gray
4 Bpp Gray
LUT Data
This register is where the 4-bit red/green/blue data value is written/read. With each
successive read or write the internal RGB selector is incremented. Depending on the RGB
Index setting, one to three access of this register will result in the Look-Up Table Address
incrementing.
Color and monochrome operation is slightly different. Both Look-Up Table schemes are
described here.
• The Look-Up Table treats the value of a pixel as an index into an array of colors or gray
• The value inside each LUT entry represents the intensity of the given color or gray
The following table shows how many elements from each Look-Up Table index are used
at the different color depths.
shades. For example, a pixel value of zero would point to the first LUT entry; a pixel
value of 7 would point to the eighth LUT entry.
shade. This intensity can range in value between 00 and 0Fh.
n/a
Table 4-4: Look-Up Table Configurations
Indicates the Look-Up Table is not used for that display mode
4 banks of 2
4 banks of 4
1 bank of 16
2 banks of 8
n/a
Red
4-Bit Wide Look-Up Table
LUT Data
Bit 3
1 bank of 16
1 bank of 16
4 banks of 2
4 banks of 4
4 banks of 2
4 banks of 4
2 banks of 8
Green
LUT Data
Bit 2
4 banks of 2
4 banks of 4
1 bank of 16
4 banks of 4
LUT Data
Bit 1
Blue
LUT Data
Bit 0
X26A-G-002-02
Read/Write
SED1374
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