Page 42
Epson Research and Development
Vancouver Design Center
S1D13706 Programming Notes and Examples
X31B-G-003-03 Issue Date: 01/02/23
In SwivelView 180°
, these registers set the horizontal coordinates (x) of the sub-window’s
bottom right corner. Increasing values of x move the bottom right corner towards the right
in steps of 32
÷
bits-per-pixel (see Table 8-1: )
Program the Sub-Window X Start Position registers so that
sub-window X start position registers = (panel width - x)
÷
(32
÷
bits-per-pixel)
Note
panel width - x must be a multiple of 32
÷
bits-per-pixel.
In SwivelView 270°
, these registers set the vertical coordinates (y) of the sub-window’s
bottom left corner. Increasing values of y move the bottom left corner downwards in steps
of 1 line.
Program the Sub-Window X Start Position registers so that
sub-window X start position registers = panel width - y
•
These bits determine the Y start position of the sub-window in relation to the origin of the
panel. Due to the S1D13706 SwivelView feature, the Y start position may not be a vertical
position value (only true in 0° and 180° SwivelView). For further information on defining
the value of the Y Start Position registers, see Section 8.3, “Picture-In-Picture-Plus
Examples” on page 48.
The registers is also incremented differently based on the SwivelView orientation. For 0°
and 180° SwivelView the Y start position is incremented in 1 line increments. For 90° and
270° SwivelView the Y start position is incremented by Y pixels where Y is relative to the
current color depth.
REG[88h] Sub-Window Y Start Position Register 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
REG[89h] Sub-Window Y Start Position Register 1
n/a n/a n/a n/a n/a n/a Bit 9 Bit 8
Table 8-2: 32-bit Address Increments for Color Depth
Bits-Per-Pixel (Color Depth) Pixel Increment (Y)
1 bpp 32
2 bpp 16
4 bpp 8
8 bpp 4
16 bpp 2
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