參數(shù)資料
型號(hào)： GS9090ACNE3
廠商： Gennum Corporation
英文描述： GS9090A GenLINX-R III 270Mb/s Deserializer for SDI
中文描述： GS9090A GenLINX - R的第三270Mb / s的SDI解串器
文件頁(yè)數(shù)： 35/69頁(yè)
文件大?。?/td> 687K
代理商： GS9090ACNE3
GS9090A Preliminary Data Sheet
Proprietary and Confidential
34714 - 0
February 2006
35 of 69
3.9.5 SMPTE 352M Payload Identifier
The GS9090A can receive and detect the presence of the SMPTE 352M payload
identifier ancillary data packet. This four word payload identifier packet may be
used to indicate the transport mechanism, frame rate and line scanning / sampling
structure.
Upon reception of this packet, the device will extract the four words describing the
video format being transported and make this information available to the host
interface via the four VIDEO_FORMAT 8 bit registers (
Table 3-8
). The device will
also indicate the version of the payload packet in bit 7 of the DATA_FORMAT
register (
Table 3-7
). When this bit is set HIGH the received SMPTE 352M packet
is version 1, otherwise it is version 0.
The VIDEO_FORMAT registers will only be updated if the received checksum is
the same as the locally calculated checksum.
NOTE: The VIDEO_FORMAT registers will not be updated with 352M payload
data if the packets are not on the correct video line (as stated in this standard).
These registers will be cleared to zero, indicating an undefined format, if the device
loses lock to the input data stream (LOCKED = LOW), or if the SMPTE_BYPASS
pin is asserted LOW. This is also the default setting after a device reset.
Table 3-7: Host Interface Description for Data Format Register
Register
Name
Bit
Name
Description
R/W
Default
DATA_FORMAT
Address: 04h
15-12
–
Not Used
–
–
11
EDH_FLAG_UPDATE
When set HIGH by the application layer, the device will
update the ancillary data, full field, and active picture
EDH flags according to SMPTE RP165.
R/W
0
10
AP_CRC_V
Active Picture CRC Valid bit.
R
0
9
FF_CRC_V
Full Field CRC Valid bit.
R
0
8
EDH_DETECT
Set HIGH by the device when EDH packets are
detected in the incoming video data.
R
0
7
VERSION_352M
Indicates whether decoded SMPTE 352M packet is
version 0 or version 1. See
SMPTE 352M Payload
Identifier on page 35
.
R
0
6-5
–
Not Used
–
–
4
STD_LOCK
Standard Lock bit. This bit will be set HIGH when the
flywheel has achieved full synchronization to the
received video standard. See
Automatic Video Standard
and Data Format Detection on page 36
.
R
0
3-0
DATA_FORMAT[3:0]
Displays the data format being carried on the serial
digital interface. See
Video Standard Indication on
page 37
.
R
0
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