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參數(shù)資料
| 型號： | AU1100LCDPERF_30274A |
| 英文描述： | AMD Alchemy? SolutionsAu1100? Processor LCD Performance Application Note? 574KB (PDF) |
| 中文描述： | 采用AMD Alchemy？ SolutionsAu1100？處理器液晶性能應(yīng)用筆記？ 574KB（PDF格式） |
| 文件頁數(shù)： | 11/19頁 |
| 文件大小： | 574K |
| 代理商： | AU1100LCDPERF_30274A |
Application Note
11
AMD Alchemy Solutions Au1100 Processor LCD Performance
Rev. 30274A April 2003
The number of 320-word buffer fills per refresh multiplied by the display refresh rate determines the
number of opportunities per second for buffer under-flows to occur. If a 320-word buffer under-flow
does occur, the display artifacts last only until the start of the next refresh.
The LCD controller under-flow problem is the direct result of long latency, and not a bandwidth
short-coming. The SDRAM has adequate bandwidth to supply the LCD controller; however, the
ability of the LCD controller to access the SDRAM in an efficient manner is impacted by the system
bus latency introduced by competing accesses to the static bus.
Table 6: LCD 320-Word Buffer Fills Per Refresh
Horizontal
(Pixels)
Vertical
(Pixels)
Framebuffer
Size
(Pixels)
Bits Per
Pixel
Pixels
Per
Buffer
Buffer Fills
Per
Refresh
QVGA
320
240
76,800
1
10240
7.5
320
240
76,800
2
5120
15
320
240
76,800
4
2560
30
320
240
76,800
8
1280
60
320
240
76,800
12
640
120
320
240
76,800
16
640
120
VGA
640
480
307,200
1
10240
30
640
480
307,200
2
5120
60
640
480
307,200
4
2560
120
640
480
307,200
8
1280
240
640
480
307,200
12
640
480
640
480
307,200
16
640
480
XGA
800
600
480,000
1
10240
46.8
800
600
480,000
2
5120
93.7
800
600
480,000
4
2560
197.5
800
600
480,000
8
1280
375
800
600
480,000
12
640
750
800
600
480,000
16
640
750
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