S1D13503 Epson Electronics America, Inc., S1D13503 Datasheet - Page 136

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

Page 40
5 ADVANCED TECHNIQUES
5.1 Virtual Displays
5.1.1 Registers
bits 7-0
S1D13503
X18A-G-002-06
AUX[0D] Address Pitch Adjustment Register
I/O address = 1101b, Read/Write.
Addr Pitch
Adjustment
Bit 7
This section presents information on the following:
•
•
•
•
•
•
This section presents a detailed description of the Address Pitch Adjustment Register, followed by a description of a virtual
display. Afterwards an example is given, showing how to create a virtual display.
Register bits discussed in this section are highlighted.
virtual displays
bitmaps and text displays
reading and writing to the S1D13503 registers
split screen displays
panning and scrolling
power saving
Addr Pitch
Adjustment
Bit 6
Address Pitch Adjustment Bits [7:0]
This register controls the virtual display by setting the numerical difference between the last address of a
display line, and the first address in the following line.
If the Address Pitch Adjustment is not equal to zero, then a virtual screen is formed. The size of the virtual
screen is only limited by the available display memory. The actual display output is a window that is part
of the whole image stored in the display memory. For example, with 128K of display memory, a 640x400
16-gray image can be stored. If the output display size is 320x240, then the whole image can be seen by
changing display starting addresses through AUX[06] and [07], and AUX[08] and [09]. Note that a virtual
screen can be produced on either a single or dual panel.
In 8-bit memory interface, if the Address Pitch Adjustment is not equal to zero, a virtual screen with a line
length of (Line Byte Count +AUX[0D]) bytes is created, with the display reflecting the contents of a win-
dow (Line Byte Count+1) bytes wide. The position of the window on the virtual screen is determined by
AUX[06] and [07], and AUX[08] and [09].
In 16-bit memory interface, if the Address Pitch Adjustment is not equal to zero, then a virtual screen with
a line length of 2x(Line Byte Count +AUX[0D]) bytes is created, with the display reflecting the contents
of a window 2x(Line Byte Count+1) bytes wide. The position of the window on the virtual screen is deter-
mined by AUX[06] and [07], and AUX[08] and [09].
Addr Pitch
Adjustment
Bit 5
Addr Pitch
Adjustment
Bit 4
Addr Pitch
Adjustment
Bit 3
Addr Pitch
Adjustment
Bit 2
Epson Research and Development
Addr Pitch
Adjustment
Bit 1
Programming Notes and Examples
Vancouver Design Center
Addr Pitch
Adjustment
Bit 0
Issue Date: 01/01/30