Register Programming - Epson S1D13706 Technical Manual

Page 142

12.4.1 Register Programming

S1D13706
X31B-A-001-08
Enable 270° SwivelView™ Mode
Set SwivelView™ Mode Select bits (REG[71h] bits 1:0) to 11.
The display refresh circuitry starts at pixel "C", therefore the Main Window Display Start
Address registers (REG[74h], REG[75h], REG[76h]) must be programmed with the
address of pixel "C". To calculate the value of the address of pixel "C" use the following
formula (assumes 8 bpp color depth).
Main Window Display Start Address bits 16:0
= (image address + ((panel width - 1) x offset x bpp ÷ 8) ÷ 4)
= (0 + ((480 pixels - 1) x 320 pixels x 8 bpp ÷ 8) ÷ 4)
= 38320 (95B0h)
Line Address Offset
The Main Window Line Address Offset registers (REG[78h], REG[79h]) is based on the
display width and programmed using the following formula.
Main Window Line Address Offset bits 9:0
= display width in pixels ÷ (32 ÷ bpp)
= 320 pixels ÷ 32 ÷ 8 bpp
= 80 (50h)
Epson Research and Development
Vancouver Design Center
Hardware Functional Specification
Issue Date: 01/11/13