參數(shù)資料
型號: TVP5146PFPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 顏色信號轉(zhuǎn)換
英文描述: COLOR SIGNAL DECODER, PQFP80
封裝: GREEN, PLASTIC, HTQFP-80
文件頁數(shù): 36/109頁
文件大?。?/td> 1658K
代理商: TVP5146PFPR
24
SLES084C August 2007
TVP5146
NTSC 601
64
PAL 601
10-Bit (PCLK = 2
Pixel Clock)
NTSC Sqp
PAL Sqp
64
Mode
B/2
First Field
B/2
858
864
780
944
H/2
32
20-Bit (PCLK = 1
Pixel Clock)
32
B/2
429
432
390
472
H/2
HS
VS
Second Field
HS
VS
B/2
H/2 + B/2
Figure 224. VSYNC Position With Respect to HSYNC
2.5.3 Embedded Syncs
Standards with embedded syncs insert the SAV and EAV codes into the data stream on the
rising and falling edges of AVID. These codes contain the V and F bits which also define vertical
timing. Table 23 gives the format of the SAV and EAV codes.
H equals 1 always indicates EAV. H equals 0 always indicates SAV. The alignment of V and F to
the line and field counter varies depending on the standard.
The P bits are protection bits:
P3 = V xor H; P2 = F xor H; P1 = F xor V; P0 = F xor V xor H
Table 23. EAV and SAV Sequence
D9 (MSB)
D8
D7
D6
D5
D4
D3
D2
D1
D0
Preamble
1
Preamble
0
Preamble
0
Status word
1
F
V
H
P3
P2
P1
P0
0
2.6
I2C Host Interface
Communication with the TVP5146 decoder is via an I2C host interface. The I2C standard
consists of two signals, the serial input/output data (SDA) line and the serial input clock line
(SCL), which carry information between the devices connected to the bus. A third signal (I2CA)
is used for slave address selection. Although an I2C system can be multimastered, the TVP5146
decoder functions as a slave device only.
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