Epson S1D13706 Technical Manual page 195

Epson Research and Development
Vancouver Design Center
Programming Notes and Examples
Issue Date: 01/02/23
Program the Main Window Line Address Offset register. REG[78h] is set to 1Eh, and
REG[79h] is set to 00h.
Example 3: In SwivelView 180
320x240 panel at a color depth of 4 bpp.
1. Confirm the main window coordinates are valid.
The horizontal coordinates must be a multiple of 32 ÷ bpp.
320 ÷ (32 ÷ 4) = 40
Main window horizontal coordinate is valid.
2. Determine the main window display start address.
The main window is typically placed at the start of display memory which is at display
address 0.
main window display start address register
= ((desired byte address + (panel width × panel height × bpp ÷ 8)) ÷ 4) - 1
= ((0 + (320 × 240 × 4 ÷ 8)) ÷ 4) - 1
= 9599
= 257Fh.
Program the Main Window Display Start Address registers. REG[74h] is set to 7Fh,
REG[75h] is set to 25h, and REG[76h] is set to 00h.
3. Determine the main window line address offset.
number of dwords per line
Program the Main Window Line Address Offset registers. REG[78h] is set to 28h, and
REG[79h] is set to 00h.
Example 4: In SwivelView 270
320x240 panel at a color depth of 4 bpp.
1. Confirm the main window coordinates are valid.
The vertical coordinates must be a multiple of 32 ÷ bpp.
240 ÷ (32 ÷ 4) = 30
Main window coordinates are valid.
°
mode, program the main window registers for a
= image width ÷ (32 ÷ bpp)
= 320 ÷ (32 ÷ 4)
= 40
= 28h
°
mode, program the main window registers for a
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S1D13706
X31B-G-003-03