Epson S1D13708 Benutzerhandbuch
Epson Research and Development
Page 187
Vancouver Design Center
Hardware Functional Specification
S1D13708
Issue Date: 02/03/07
X39A-A-001-02
14 Ink Layer
The S1D13708 Ink Layer design provides support for a foreground image that can be
overlaid on the background (or main) image. The Ink Layer supports all color depths and
automatically adjusts to the resolution of the display.
overlaid on the background (or main) image. The Ink Layer supports all color depths and
automatically adjusts to the resolution of the display.
14.1 Memory Mapping
The S1D13708 has 80K bytes of embedded SRAM. When the ink layer is enabled, this
memory is divided into two 40K byte blocks which can be logically represented as shown
below.
memory is divided into two 40K byte blocks which can be logically represented as shown
below.
Figure 14-1 Memory Mapping for Ink Layer
14.2 Controlling the Ink Layer
The Ink Layer is controlled using REG[C7h] through REG[C9h].
Enabling the Ink Layer
00000h
13FFFh
00000h
13FFFh
0A000h
Ink Layer Disabled
(REG[C9h] bit 0 = 0)
(REG[C9h] bit 0 = 0)
Ink Layer Enabled
(REG[C9h] bit 0 = 1)
(REG[C9h] bit 0 = 1)
40K Byte
Display Buffer
Display Buffer
80K Byte
Display Buffer
Display Buffer
40K Byte
Ink Layer
Ink Layer
(background)
(foreground)