Filter
Top Products
Epson Research and Development Page 31
Vancouver Design Center
Programming Notes and Examples S1D13708
Issue Date: 01/11/20 X39A-G-003-01
ADVANCE
D
IN
F
ORMATION
Subje
ct to C
ha
nge
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.
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.
The S1D13708 provides hardware support for SwivelView in all color depths (1, 2, 4, 8 and
16 bpp).
For further details on the SwivelView feature, see the S1D13708 Hardware Functional
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:
Special Effects Register
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
76543 210
Table 7-1: SwivelView
TM
Mode Select Options
SwivelView Mode Select Bits SwivelView Orientation
00 0° (Normal)
01 90°
10 180°
11 270°