S1D13704 Epson Electronics America, Inc., S1D13704 Datasheet - Page 87

• Manufacturer Part Number: S1D13704
• Description: LCD Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
12.1.1 How to Set Up Default SwivelView Mode
Hardware Functional Specification
Issue Date: 02/02/01
Note
The following describes the register settings needed to set up Default SwivelView Mode
for a 240x320x4 bpp image:
• Select Default SwivelView Mode: REG[1Bh] bit 7 = 1 and bit 6 = 0
• The display refresh circuitry starts at pixel “B”, therefore the Screen 1 Start Address
• The Line Byte Count Register for SwivelView Mode must be set to the virtual-image
• Panning is achieved by changing the Screen 1 Start Address register:
register must be programmed with the address of pixel “B”, i.e.
width in bytes, i.e.
• Increment the register by 1 to pan horizontally by one byte, e.g. two pixels in 4 bpp
• Increment the register by twice the value in the Line Byte Count register to pan verti-
Vertical panning by a single line is not supported in Default SwivelView Mode.
mode
cally by two lines, e.g. add 100h to pan by two lines in the example above.
REG 0Dh REG 0Ch
Where bpp is bits-per-pixel and bpb is bits-per-byte.
Where bpb is bits-per-byte and bpp is bits-per-pixel.
REG 1Ch
=
----------------------------------------- -
8bpb
=
=
=
=
256
AddressOfPixelB
AddressOfPixelA
AddressOfPixelA
AddressOfPixelA
4bpp
=
256
-------- -
2
=
128
+
+
+


77h
ByteOffset
240pixels
--------------------------------------------
=
80h
8bpb
4bpp


–
1
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S1D13704
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