SED1374 Datasheet, PDF (140/420 Pages) Epson Company – SED1374 Embedded Memory Color LCD Controller

Page 44
Epson Research and Development
Vancouver Design Center
Plugging the values into the frame rate calculations yields:
FrameRate = ₍---H-----D----P-----+-----H-----N----D-----P-P---₎-C--_×--L---₍-K--V----D-----P-----+-----V----N-----D-----P----₎
FrameRate = ₍---3---2---0----1--+-----6----8--^,---8---0-----₎^-0---2--_×^-0------,---₍^{---0---2---0---4---0--0-----+-----3----}₎ = 80.69
For this example the Horizontal Non-Display register [REG[08h]) needs to be set to 07h
and the Vertical Non-Display register (REG[0Ah]) needs to be set to 03h.
The 16,000,000/2 in the formula above represents the input clock being divided by two
when this alternate SwivelView mode is selected. With the values given for this example
we must ensure the Input Clock Divide bit (REG[02h] b4) is reset (with the given values it
was likely set as a result of the frame rate calculations for landscape display mode).
No other registers need to be altered.
The display is now configured for SwivelView mode use. Offset zero of display memory
corresponds to the upper left corner of the display. Display memory is accessed exactly as
it was for landscape mode.
As this is the alternate SwivelView mode the power of two stride issue encountered with
the default SwivelView mode is no longer an issue. The stride is the same as the
SwivelView mode width. In this case 120 bytes.
SED1374
X26A-G-002-02
Programming Notes and Examples
Issue Date: 99/04/27