Epson Research and Development

Page 115

Vancouver Design Center

 

 

 

9.1 Image Buffer

The image buffer contains the formatted display data - see Section 10.1, “Display Mode Data

Format” on page 116.

The displayed image(s) may take up only a portion of the image buffer; the remaining area can be used for multiple images - possibly for animation or general storage. See Section 10, “Display Configuration” on page 116 for details on the relationship between the image buffer and the display.

9.2 Half Frame Buffer

In dual panel mode, with the half frame buffer enabled, the top of the display buffer is allocated to the half-frame buffer. The size of the half frame buffer is a function of the panel resolution and whether the panel is color or monochrome:

Half Frame Buffer Size (in bytes) = (panel width x panel length) * factor / 16

where factor = 4 for color panel

= 1 for monochrome panel

For example, for a 640x480 8 bpp color panel the half frame buffer size is 75K bytes. In a 512K byte display buffer, the half-frame buffer resides from 6D400h to 7FFFFh. In a 2M byte display buffer, the half-frame buffer resides from 1ED400h to 1FFFFFh.

Hardware Functional Specification

S1D13504

Issue Date: 01/01/30

X19A-A-002-18

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Image 121
Epson S1D13504 manual Image Buffer, Half Frame Buffer