SAF7118EH/V1/G-T NXP Semiconductors, SAF7118EH/V1/G-T Datasheet - Page 169
SAF7118EH/V1/G-T
Manufacturer Part Number
SAF7118EH/V1/G-T
Description
Video ICs 9BIT VIDEO DECODER
Manufacturer
NXP Semiconductors
Datasheet
1.SAF7118EHV1G-T.pdf
(175 pages)
Specifications of SAF7118EH/V1/G-T
Screening Level
Industrial
Package Type
HBGA
Pin Count
156
Lead Free Status / RoHS Status
Compliant
Other names
SAF7118EH/V1/G,518
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SAF7118_4
Product data sheet
Workaround:
Such error can be detected and corrected through software post-processing, by
investigating the actual byte count value BC for each data packet:
The entire data packet must be captured in some intermediate memory accessible to
software. (The SAV and EAV sequences may get dropped, i.e. not stored in memory.
At least 48 bytes have to be captured).
The last byte before the SAV sequence contains the BC = byte count of ‘payload’, which is
counted from IDI1 byte to last actual sliced data byte.
The BC byte is coded with 6 bits count value in the 2 lower bits, and complemented with
an odd parity bit in the MSB.
Table 152. BC byte description
In nominal case those BC are 2 bytes more than the real MOJI byte count, i.e. 37d,
BC byte nominal = 25h.
In the event of insertion of erroneous bytes, the fault bytes are counted like payload,
resulting to an unexpectedly increased BC number, BC byte unequal 25h.
Recommended procedure:
Alternative procedure:
This approach is applicable only if it is true, that the first real MOJI byte per line is always
non-zero.
Odd parity
1. Capture VBI sliced data packet
2. Get BC byte, i.e. last byte before EAV sequence
3. Suppress MSB (parity bit), remain payload byte count BC
4. Whenever BC unequals 37d, exactly (BC
5. MOJI data bytes are the 35 bytes following internal header, either if no error occurred
1. Capture VBI sliced data packet
2. Parse through data set, find internal header (by counting)
3. After internal header, skip zero bytes until first non-zero byte
4. MOJI data bytes are the 35 bytes beginning with that first non-zero byte
OP
be removed, directly following the IDI2 byte. That means:
a. If BC = 37d, then no error go to 5
b. If BC = 39d, then remove 2 erroneous bytes after internal header go to 5
c. If BC = 40d, then remove 3 erroneous bytes after internal header go to 5
or after the erroneous bytes have been removed
7
fix
6
0
0
Rev. 04 — 4 July 2008
32
5
5
Multistandard video decoder with adaptive comb filter
16
4
4
BC = byte count of payload, bit value
37d) erroneous bytes from capture must
3
3
8
2
2
4
SAF7118
© NXP B.V. 2008. All rights reserved.
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