Epson S1D13708 Manuel D’Utilisation
Epson Research and Development
Page 31
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Programming Notes and Examples
S1D13708
Issue Date: 01/11/20
X39A-G-003-01
ADVANCE
D
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FOR
MAT
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Subje
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7 SwivelView
Most computer displays operate in landscape mode. In landscape mode the display is
typically wider than it is high. For example, a display size of 320x240 is 320 pixels wide
and 240 lines high.
typically wider than it is high. For example, a display size of 320x240 is 320 pixels wide
and 240 lines high.
SwivelView rotates the display image counter-clockwise in ninety degree increments.
Rotating the image on a 320x240 display by 90 or 270 degrees yields a display that is now
240 pixels wide and 320 lines high.
Rotating the image on a 320x240 display by 90 or 270 degrees yields a display that is now
240 pixels wide and 320 lines high.
The S1D13708 provides hardware support for SwivelView in all color depths (1, 2, 4, 8 and
16 bpp).
16 bpp).
For further details on the SwivelView feature, see the S1D13708 Hardware Functional
Specification, document number X39A-A-001-xx.
Specification, document number X39A-A-001-xx.
7.1 SwivelView Registers
The following registers control the SwivelView feature.
SwivelView Mode Select
The SwivelView modes are selected using the SwivelView Mode Select Bits[1:0] (bits 1-
0). The combinations of these bits provide the following rotations:
0). The combinations of these bits provide the following rotations:
Special Effects Register
REG[71h]
REG[71h]
Read/Write
Display Data
Word Swap
Display Data
Byte Swap
n/a
PIP
+
Window
Enable
n/a
SwivelView Mode Select
Bits 1-0
7
6
5
4
3
2
1
0
Table 7-1: SwivelView
TM
Mode Select Options
SwivelView Mode Select Bits
SwivelView Orientation
00
0° (Normal)
01
90°
10
180°
11
270°