S1D13704 Epson Electronics America, Inc., S1D13704 Datasheet - Page 105
S1D13704
Manufacturer Part Number
S1D13704
Description
LCD Controller
Manufacturer
Epson Electronics America, Inc.
Datasheet
1.S1D13704.pdf
(492 pages)
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2.1 Frame Rate Calculation
Programming Notes and Examples
Issue Date: 01/02/12
Register
[1E],[1F]
[1C]
[0F]
[10]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[1A]
[1B]
1111 1111 (FF)
0000 0000 (00)
0000 0000 (00)
0000 0000 (00)
0000 0011 (03)
0000 0000 (00)
0000 0000 (00)
0000 0000 (00)
0000 0000 (00)
0000 0000 (00)
0000 0000 (00)
0000 0000 (00)
0000 0000 (00)
0000 0000 (00)
Value (hex)
The system the S1D13704 is being configured for dictates certain physical constraints such
as the width and height of the panel and the video system input clock.
The following are the formulae for determining the frame rate of a panel. The frame rate
for a single passive or TFT panel is calculated as follows:
for a dual passive panel the formula is:
where: PCLK
To achieve the desired frame rate the HNDP and VNDP values can be manipulated. The
example below is a generic routine to calculate HNDP and VNDP from a desired frame
rate.
Table 2-1: S1D13704 Initialization Sequence (Continued)
Screen 2 Start Address - set to 0 for initialization
Memory Address offset - not virtual setup so set to 0
Set the vertical size to the maximum value.
SetLUT control registers to 0 for this example.
GPIO control and status registers - set to “0”
Set the scratch pad bits to “0”.
We are not setting up SwivelView mode so set this register to “0”.
Line Byte Count is only required for SwivelView mode.
These registers are reserved and should not be written to.
HDP
HNDP
VDP
VNDP
FrameRate
FrameRate
= Pixel clock (in Hz)
= Horizontal Display Period (in pixels)
= Horizontal Non-Display Period (in pixels)
= Vertical Display Period (in lines)
= Vertical Non-Display Period (in lines)
=
=
-------------------------------------------------------------------------------------------------- -
2
---------------------------------------------------------------------------------------- -
HDP
HDP
+
+
HNDP
Notes
HNDP
PCLK
PCLK
VDP
VDP
----------- -
2
+
+
VNDP
VNDP
Split Screen on page 30
Look-Up Table (LUT) on
page 14
See Also
X26A-G-002-03
S1D13704
Page 9
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