S1D13503 Epson Electronics America, Inc., S1D13503 Datasheet - Page 93

• Manufacturer Part Number: S1D13503
• Description: S1d13503 Graphics Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
9.4 Memory Size Calculation
9.5 Memory Size Requirement
Hardware Functional Specification
Issue Date: 01/01/29
(1) Memory more than 128KB cannot be supported by S1D13503.
(2) Memory more than 64KB can only be supported through 16-bit display memory interface.
(3) 256 color mode must use 16-bit display memory interface.
* KB = K byte = 1024 bytes
Memory Size (bytes) =
Example : For a 640x480, 4 gray shades (2 bits-per-pixel) system :
Memory Size (bytes) =
The following tables summarize the preceding information (formulae).
Input clock (f
being used. As a result, different resolutions will have different input clock and memory requirements for a particular frame
rate. Tables 9-3 through 9-5 summarize the minimum memory size and access time requirements for various resolutions at
a particular input clock along with the corresponding frame rates.
480
400
320
256
240
200
Condition AUX[0C] = AUX[02]
Interface
Memory
Display
Display
Mode
16-bit
16-bit
16-bit
16-bit
16-bit
16-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
OSC
(KB) 3V/3.3V
37.5
Size
) is limited by SRAM access time depending on the display mode and display memory interface that is
32
25
20
19
16
Black-and-White
(1 bit-per-pixel)
Table 9-3: Memory Size Requirement: Number of Horizontal Pixels = 640
125 ns
160 ns
210 ns
125 ns
290 ns
125 ns
290 ns
160 ns
360 ns
Access Time
40 ns
60 ns
85 ns
(BW)
----------------------------------------------------------------------------------------------------------------------------------------------- -
----------------------------------------------- -
HorizontalPixels
640
140 ns
175 ns
100 ns
225 ns
140 ns
305 ns
140 ns
305 ns
175 ns
375 ns
55 ns
75 ns
5V
480
8
(KB) 3V/3.3V
Size
62.5
37.5
75
50
40
32
4 Grays / 4 Colors
(2 bits-per-pixel)
Number of Horizontal Pixels = 640
AUX[0C] = 0
2
125 ns
160 ns
210 ns
125 ns
290 ns
125 ns
290 ns
160 ns
360 ns
Access Time
60 ns
85 ns
=
(2)
76800bytes
VerticalLines
140 ns
175 ns
100 ns
225 ns
140 ns
305 ns
140 ns
305 ns
175 ns
375 ns
8
75 ns
5V
(2)
(KB) 3V/3.3V
16 Grays / 16 Colors
Size
62.5
150
125
100
=
80
75
(4 bits-per-pixel)
75Kbyte
AUX[0C] = 0
125 ns
125 ns
160 ns
BitsPerPixel
Access Time
60 ns
85 ns
60 ns
(1)
(2)
(2)
(2)
(2)
100 ns
140 ns
140 ns
175 ns
75 ns
75 ns
5V
(1)
(2)
(2)
(2)
(2)
(KB) 3V/3.3V
Size
300
250
200
160
150
125
(8 bits-per-pixel)
AUX[0C] = 0
256 Colors
(2)(3)
Access Time
60 ns
(1)
(1)
(1)
(1)
(1)
(2)(3)
75 ns
5V
(1)
(1)
(1)
(1)
(1)
24 MHz 76 Hz 74 Hz
20 MHz 75 Hz 74 Hz
16 MHz 75 Hz 73 Hz
12 MHz 70 Hz 69 Hz
12 MHz 75 Hz 73 Hz
10 MHz 75 Hz 73 Hz
(f
Clock
Input
OSC
X18A-A-001-08
)
Example
BW /
Gray
S1D13503
Frame Rate
Page 85
Color