參數(shù)資料
型號： GS1560A*
英文描述： Reclocking deserializer for HD-SDI. SD-SDI & DVB-ASI with loop thru cable driver. 3.3/1.8V supply.
中文描述： 時鐘重計解串器的HD - SDI的。標(biāo)清SDI
文件頁數(shù)： 39/55頁
文件大小： 922K
GENNUM CORPORATION
27360 - 2
39 of 55
G
3.10.4.2 Data Format Indication
The luma and chroma data format codes will be reported in
the YDATA_FORMAT[3:0] and CDATA_FORMAT[3:0] bits of
the VIDEO_STANDARD register when the device is
operating in HD mode, (SD/HD = LOW).
In SD or DVB-ASI mode, the data format code will only
appear
in
the
YDATA_FORMAT[3:0]
CDATA_FORMAT[3:0] bits will be set to 'F
h
'. These codes
represent the data formats listed in Table 10.
bits.
The
The YDATA_FORMAT[3:0] and CDATA_FORMAT[3:0] bits of
the VIDEO_STANDARD register will default to 'F
h
' after
device reset. These bits will also default to 'F
h
' if the device
loses lock to the input data stream, (LOCKED = LOW), or if
Data-Through mode is enabled, (see Section 3.9).
3.10.5 Error Detection and Indication
The GS1560A 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 either DVB-ASI or
Data-Through operating modes. See Section 3.8 and
Section 3.9.
The device maintains an error status register at address
000
h
called ERROR_STATUS (Table 11). Each type of error
has a specific flag or bit in this register which is set HIGH
whenever that error is detected.
The ERROR_STATUS register will be cleared at the start of
each video field or when read by the host interface, which
ever condition occurs first.
All bits of the ERROR_STATUS register except the
LOCK_ERR bit will also be cleared if a change in the video
standard is detected, or under the following conditions:
RESET_TRST is held LOW
LOCKED is asserted LOW
SMPTE_BYPASS is asserted LOW in slave mode
In addition to the ERROR_STATUS register, a register called
ERROR_MASK (Table 12) is included which allows the host
interface to select the specific error conditions that will be
detected. There is one bit in the ERROR_MASK register for
each type of error represented in the ERROR_STATUS
register.
The bits of the ERROR_MASK register will default to '0' after
device reset, thus enabling all error types to be detected.
The host interface may disable individual error detection by
setting the corresponding bit HIGH in this register.
Error conditions are also indicated to the application layer
via the status signal pin DATA_ERROR. This output pin is a
logical 'OR'ing of each error status flag stored in the
ERROR_STATUS register. DATA_ERROR is normally HIGH,
but will be set LOW by the device when an error condition
that has not been masked is detected.
TABLE 10 DATA FORMAT CODES
YDATA_FORMAT[3:0] OR
CDATA_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
TDM data
SMPTE 346M
9h ~ Eh
Reserved
Fh
Unknown data format
-
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