參數(shù)資料
型號(hào): SAA6721E
廠商: NXP SEMICONDUCTORS
元件分類: 圖形處理器
英文描述: SXGA RGB to TFT graphics engine(XGA RGB 到 TFT圖形引擎)
中文描述: GRAPHICS PROCESSOR, PBGA292
封裝: 27 X 27 MM, 1.75 MM HEIGHT, PLASTIC, SOT-489-1, BGA-292
文件頁數(shù): 15/72頁
文件大小: 360K
代理商: SAA6721E
1999 May 11
15
Philips Semiconductors
Preliminary specification
SXGA RGB to TFT graphics engine
SAA6721E
Fig.4 Clamp and gain correction pulses.
handbook, full pagewidth
MHB244
CLAMP
RGB data
GAINC
blanking
7.4
YUV input port
The YUV input port supports interlaced video streams and
provides an easy connection to most common decoder
ICs. It consists of the luminance port VPA7 to VPA0, the
chrominance port VPB7 to VPB0, and eventually
VPC7 to VPC0, which are CCIR 601 level compatible
(Y: 16 to 235, and UV: 16 to 240).
Supported at this port are the formats YUV 4 : 1 : 1,
YUV 4 : 2 : 2 and YUV 4 : 2 : 2 with CCIR 656 codes
(see Table 2).
YUV 4 : 4 : 4 data can be applied at VPA7 to VPA0 (Y),
VPB7 to VPB0 (U), and VPC7 to VPC0 (V). Input data is
sampled with respect to the clock at pin VCLK if pin VPD7
(CREF) is asserted.
The start of active video data in a line is marked by the
rising edge at pin VPD6 (HREF) and the end of valid video
data is marked by the falling edge at pin VPD6. Figure 5
illustrates this at a YUV 4 : 2 : 2 example.
Fig.5 CREF and HREF timing.
handbook, full pagewidth
MHB245
VCLK
CREF
HREF
Y0
XX
Y719
Y6
Y5
...
Y3
Y2
Y1
U0
XX
V718
U718
V716
...
V2
U2
V0
XX
XX
Y7 to Y0
UV7 to UV0
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