Page 208
Epson Research and Development
Vancouver Design Center
Display Start Address
The Display Start Address must be programmed to be at the bottom-right corner of the
image, since the display is now refreshed in the reverse direction. The LCD Display Start
Address register (REG[042h], REG[043h], REG[044h]) must be set accordingly.
LCD Display Start Address (words)
= ((LCD Memory Address Offset) × H) − 1
where H is the height of the panel in number of lines.
Horizontal Panning
Horizontal panning is achieved by changing the LCD Display Start Address register. It
works in the same way as in 90° SwivelView™ mode:
• Increase/decrease LCD Display Start Address register by 1024 (15/16 bpp mode) or 512
(8 bpp mode) pans the display window to the right/left by 1 pixel.
The amount the display window can be panned to the right is limited to 1024 pixels and
limited by the amount of physical memory installed.
Vertical Scrolling
Vertical scrolling is achieved by changing the LCD Display Start Address register and/or
the LCD Pixel Panning register. It works in the same way as in 90° SwivelView™ mode,
except that the effect of the LCD Pixel Panning register is reversed:
• Increment/decrement LCD Display Start Address register in 8 bpp mode scrolls the
display window up/down by 2 lines.
• Increment/decrement LCD Display Start Address register in 15/16 bpp mode scrolls the
display window up/down by 1 line.
• Increment/decrement LCD Pixel Panning register in 8 bpp mode scrolls the display
window down/up by 1 line.
15.4.2 Physical Memory Requirement
270° SwivelView™ mode has the same physical memory requirement as in 90°
SwivelView™ mode.
S1D13506
X25B-A-001-10
Hardware Functional Specification
Issue Date: 01/02/06
EPSON [ EPSON COMPANY ]
