PNX1500E NXP Semiconductors, PNX1500E Datasheet - Page 444
PNX1500E
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PNX1500E
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1500E.pdf
(828 pages)
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PNX15XX_PNX952X_SER_N_4
Product data sheet
Four sequential ANC preamble bytes, 00, FF, FF and a qualified DID word, enable
ANC data capture. A qualified DID word is defined:
2 LSBs of both ID_MASK_0 and ID_MASK_1 need to be programmed to 2’b00 in 8-
bit data mode to prevent unexpected results.
In the type 1 case, the data block number (DBN) distinguishes successive data
packets with a common data ID. In the type 2 case, the DID is followed by the
secondary identification (SDID). The captured packed length is taken form the data
count (DC) byte.
A value of DC=0 will capture exactly four data words consisting of DID, DBN (or
SDID), DC and checksum (CS). If DC is not equal to 0, additional user data words
defined by DC are captured. Parity bits for DBN (or SDID) and DC bytes are not
checked.
Auxiliary Data Acquisition Window
The auxiliary data acquisition window can be used to capture either VBI data or an
additional region of video data. It provides yet another capture-window. The field
identifier is compared against AUX_CFEN bits at the start of the programmed window
to control whether a field is captured or not. The start and end points of the auxiliary
window are defined by the AUX Window Start and End registers at offsets 00180 and
00184 ( AUX_XWS, AUX_YWS, AUX_XWE, AUX_YWE ).
The AUX_XWS parameter specifies the number of the first pixel to be captured after
the HREF reference edge.The AUX_YWS parameter specifies the number of the first
line to be captured after AUX reference edge.
The AUX_XWE parameter specifies the number of the last pixel to be captured.The
AUX_YWE parameter specifies the number of the last line to be captured.
Pixel and lines start counting at 0.
Figure 14: ANC Masked ID Checking
•
•
•
masked AUX_ANC-enabled ID matched (see
bit 8 is even parity for bit 7-0(10-bit data mode) / bit 7-2(8-bit data mode)
bit 9 = not bit 8
ID_MASK_0/ID_MASK_1
DATA_ID_0/DATA_ID_1
data stream DID word
Rev. 4.0 — 03 December 2007
MSB
9
8
7
7
7
ID of 10-bit data
ID of 8-bit data
6
6
6
5
5
5
4
4
4
3
3
3
2
2
2
Chapter 12: Video Input Processor
PNX15xx/952x Series
Figure
1
1
1
LSB
0
0
0
13)
ID_MASK_*[i] bit enables
DATA_ID_*[i] bit checking
on bit i of a data stream
DID word
© NXP B.V. 2007. All rights reserved.
12-444
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