S1D13503 Epson Electronics America, Inc., S1D13503 Datasheet - Page 78

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

Page 70
bits 7-6
bits 5-4
S1D13503
X18A-A-001-08
AUX[0E] Look-Up Table Address Register
I/O address = 1110b, Read/Write
Green Bank
Bit 1
.
The S1D13503 has three internal 16 position, 4-bit wide Look-Up Tables (palettes). The 4-bit value programmed into each
table position determines the output gray shade / color weighting of display data. These tables are bypassed in black-and-
white (BW) display mode.
These three 16 position Look-Up Tables can be arranged in many different configurations to accommodate all the gray
shade / color display modes.
Refer to Look-Up Table Architecture on page 72 for formats.
Green Bank
Bit 0
Green Bank Bits [1:0]
In 4-level gray / color display modes (2-bits/pixel), the 16 position Green palette is arranged into four, 4
position “banks”. These two bits control which bank is currently selected. These bits have no effect in 16-
level gray / color display modes (4-bits/pixel).
In 256 color display modes (8-bit/pixel), the 16 position Green palette is arranged into two, 8 position
“banks” for the display of “green” colors. Only bit 0 of these two bits controls which bank is currently
selected.
ID Bit / RGB Index Bits [1:0]
These bits have dual purpose;
ID Bits: After power on or hardware reset, these bits can be read to identify the S1D13503. These same
bits are used to identify the pin compatible S1D13502 and would only be used in system implementations
where common software is being used. As these bits are R/W they must be read before being written in
order to be used as ID bits.
RGB Index bits [1:0]: These bits are also used to provide access to the three internal Look-Up Tables
(RGB).
Power On or
RESET
bit 5
0
0
1
1
ID Bit /
RGB Index
Bit 1
Aux[0E]
Table 8-7: Look-Up Table Access
bit 4
0
1
0
1
ID Bit /
RGB Index
Bit 0
S1D13503
S1D13502
S1D13502
Chip
F352
Auto-increment (see Note 1)
Table 8-6: ID Bit Usage
Green palette R/W access
Blue palette R/W access
Look-Up Table Access
Red palette R/W access
Palette
Address
Bit 3
Palette
Address
Bit 2
bit 5
0
0
1
1
Aux[0E]
Palette
Address
Bit 1
Hardware Functional Specification
Epson Research and Development
bit 4
0
1
0
1
Vancouver Design Center
Palette
Address
Bit 0
Issue Date: 01/01/29