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)： 37/69頁(yè)
文件大小： 687K
代理商： GS9090ACNE3
GS9090A Preliminary Data Sheet
Proprietary and Confidential
34714 - 0
February 2006
37 of 69
3.9.6.1 Video Standard Indication
As well as detecting the video standard, the GS9090A can extract the data format
being carried on the serial digital interface (i.e. SDTI, SDI, or DVB-ASI).
This information is represented by bits 0 to 3 of the DATA_FORMAT register
(
Table 3-7
), which may be read by the application layer via the host interface.
DATA_FORMAT[3:0] register codes are shown in
Table 3-10
.
The DATA_FORMAT[3:0] register defaults to Fh (undefined) after a system reset.
The register will also be set to its default value if the device is not locked (LOCKED
= LOW), or if both SMPTE_BYPASS and DVB_ASI pins are LOW.
3.9.7 Error Detection and Indication
The GS9090A contains a number of error detection functions to enhance operation
of the device when operating in SMPTE mode. These functions, except lock error
detection, will not be available in DVB-ASI mode (
DVB-ASI Functionality on
page 27
) or Data-Through mode (
Data-Through functionality on page 28
).
The device maintains an error status register at address 01h called
ERROR_STATUS. Each type of error has a specific flag or bit in this register that
is set HIGH whenever that error is detected (
Table 3-11
).
All bits in the ERROR_STATUS register, except the LOCK_ERR bit, will be cleared
at the start of each video field or when read by the host interface, whichever
condition occurs first.
All bits, with the exception of the LOCK_ERR, will also be cleared if a change in the
video standard is detected, or under the following conditions:
LOCKED is asserted LOW
SMPTE_BYPASS is asserted LOW in Manual mode
Table 3-10: Data Format Register Codes
Data Format[3:0]
Data Format
Applicable Standards
0h
SDTI DVCPRO - No ECC
SMPTE 321M
1h
SDTI DVCPRO - ECC
SMPTE 321M
2h
SDTI DVCAM
SMPTE 322M
3h
SDTI CP
SMPTE 326M
4h
Other SDTI fixed block size
–
5h
Other SDTI variable block size
–
6h
SDI
–
7h
DVB-ASI
–
8h ~ Eh
Reserved
–
Fh
Unknown data format
–
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