參數(shù)資料
型號(hào)： W9966CF
廠商： WINBOND ELECTRONICS CORP
元件分類： 消費(fèi)家電
英文描述： Video Camera Interface Controller With Compression(運(yùn)用壓縮技術(shù)的攝像照相機(jī)接口控制器)
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝： PLASTIC, QFP-100
文件頁(yè)數(shù)： 20/44頁(yè)
文件大?。?/td> 278K
代理商： W9966CF
Prel i m nary -20- November 1997
W9966CF/TF
Video Camera Interface Controller with Compression
7.4Memory Controller
A frame buffer (SRAM) is needed to buffer the real-time CCD data for frame rate adjustment. The
Memory Controller is designed to arbitrate memory requests from the CCD and the host, and to
generate all SRAM control signals.
7.4.1Memory Size and Estimated Performance
Table 7.5 shows the memory size needed and the estimated performance for various picture formats.
The performance is estimated based on the assumption of 1.2 Mbytes/s ECP bandwidth.
TABLE 7.5 MEMORY SIZE AND ESTIMATED PERFORMANCE
PICTURE FORMAT
SRAM
PERFORMANCE
(fps)
160x120, Raw Data, Original Transfer
32Kx8x1
30
160x120, YUV4:2:0, Original Transfer
32Kx8x1
30
160x120, YUV4:2:2, Original Transfer
32Kx8x2
30
176x144, Raw Data, Original Transfer
32Kx8x1
30
176x144, YUV4:2:0, Original Transfer
32Kx8x2
30
176x144, YUV4:2:2, Original Transfer
32Kx8x2
23.67
320x240, Raw Data, Original Transfer
128Kx8x1
15.63
320x240, YUV4:2:0, Original Transfer
128Kx8x1
10.42
320x240, YUV4:2:2, Original Transfer
128Kx8 + 32Kx8
7.81
320x240, YUV4:2:2, Compressed Transfer
128Kx8x1
15.63
352x288, Raw Data, Original Transfer
128Kx8x1
11.84
352x288, YUV4:2:0, Original Transfer
128Kx8 + 32Kx8
7.89
352x288, YUV4:2:2, Original Transfer
128Kx8x2
5.92
352x288, YUV4:2:2, Compressed Transfer
128Kx8x1
11.84
640x480, Raw Data, Original Transfer
256Kx8 + 128Kx8
3.90
640x480, YUV4:2:0, Original Transfer
256Kx8x2
2.60
Note:
assumes EyEuEv4:2:2 quantization level is used in Compressed Transfer.
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