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Epson Research and Development
Vancouver Design Center
S1D13503
LCD Panel Options / Memory Requirements
X18A-G-005-05
Issue Date: 01/01/30
2 CONFIGURATION EQUATIONS
This application note will follow one example through all the required calculations. For a complete description of all
formula and associated parameters refer to the Hardware Functional Specification.
2.1 Example
LCD panel resolution:
320x240
LCD panel configuration:
8-bit, single panel, single drive panel
LCD colors:
256
Desired frame-rate:
70Hz
S1D13503 operating voltage:
3.3v
2.1.1 Input Clock Requirement Calculation
For a frame rate of 70Hz, the input clock (or pixel clock) frequency can be calculated as following:
f
OSC
= input clock
Where DHNDP is Default Horizontal Non-Display Period in term of pixels:
DHNDP = 16 pixels in gray shade display modes, and
DHNDP = 32 pixels in BW display mode and in color display modes.
Where PHNDP is Programmable Horizontal Non-Display Period in term of pixels:
PHNDP = 0 pixels when AUX[0C] = 0, and
PHNDP =
pixels when AUX[0C] not equal to zero.
Note
For this example we will use DHNDP = 32, PHNDP = 0
Therefore:
f
OSC
= 70 * (320 + 32) * (240 + 4)
f
OSC
= 6.0 MHz
f
OSC
FrameRate
NumberOfHorizontalPixels
PHNDP
DHNDP
+
+
(
)
NumberOfVerticalLines
4
+
(
)
×
×
=
AUX 0C
[
]
1
+
(
)
MemoryInterfaceWidth
(
)
×
BitsPerPixel
(
)
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