vpx3224d ETC-unknow, vpx3224d Datasheet - Page 19

• Manufacturer Part Number: vpx3224d
• Description: Video Pixel Decoders
• Manufacturer: ETC-unknow

Micronas
PRELIMINARY DATA SHEET
be checked and corrected if necessary to assure an ap-
propriate size of VACT for both data and ancillary header.
Table 2–5 shows the coding of the ancillary header in-
formation. The word I[2:0] contains a value for data type
identification (1 for sliced and 3 for raw data during odd
fields, 5 for sliced and 7 for raw data during even fields).
M[5:0] contains the MSBs and L[5:0] the LSBs of the
number of following D-words (32 for sliced data, 285 for
raw data). DC1 is normally used as secondary data ID.
The value 0 for M[5:0] in the case of sliced data marks
an undefined format. Bit 6 is even parity for bit5 to bit0.
Bit 7 is the inverted parity flag. Note that the following
user data words (video data) are either limited or have
odd parity to assure that 0 and 255 will not occur. Bit 3
in RAM 0x150 selects between these two options.
Digital
Video Output
VACT
Fig. 2–18: Output of video or VBI data with embedded reference headers (according to ITU-R656)
DATA
(Port A)
VACT
PIXCLK
LLC
Fig. 2–19: Detailed data output (double clock mode)
Digital
Video Output
VACT
Fig. 2–20: Output of VBI-data as ancillary data
80h
10h
Y = 10
Y = 10
SAV
horizontal blanking
horizontal blanking
constant during
constant during
1
hex
hex
SAV
; C
; C
2
R
R
= C
= C
SAV
B
B
3
= 80
= 80
SAV
hex
hex
4
current line length
current line length
C
B1
size of programmable VACT
dependent on window size
Y
1
dependent on VBI-window size
C
C
R1
B
D
Y C
1
Y
D
2
R
2
Y ...
D
Table 2–5: Coding of the ancillary header information
3
C
Pream1
Pream2
Pream3
DID
DC1
DC2
D
Word
Bn–1
4
...
Y
n–1
VPX 3225D, VPX 3224D
MSB
0
1
1
NP
NP
NP
7
C
Rn–1
SAV: “start of active video” header
EAV: “end of active video” header
SAV: “start of active video” header
EAV: “end of active video” header
0
1
1
P
P
P
6
Y
n
EAV
0
1
1
0
M5
L5
5
1
EAV
0
1
1
1
M4
L4
4
Bit No.
2
EAV
0
1
1
0
M3
L3
C
C
3
3
B
B
Y C
Y C
EAV
0
1
1
I2
M2
L2
2
R
R
4
Y ...
Y ...
80h
0
1
1
I1
M1
L1
1
10h
LSB
0
1
1
I0
M0
L0
0
19