S1D13704 Epson Electronics America, Inc., S1D13704 Datasheet - Page 140

• Manufacturer Part Number: S1D13704
• Description: LCD Controller
• Manufacturer: Epson Electronics America, Inc.

Page 44
S1D13704
X26A-G-002-03
Plugging the values into the frame rate calculations yields:
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.
FrameRate
FrameRate
=
=
---------------------------------------------------------------------------------------- -
HDP
-------------------------------------------------------
320
+
16 000 000
----------------------------- -
+
HNDP
88
2
PCLK
240
VDP
+
3
+
=
VNDP
80.69
Epson Research and Development
Programming Notes and Examples
Vancouver Design Center
Issue Date: 01/02/12