參數(shù)資料
型號(hào)： GS1532*
英文描述： Serializer for HD-SDI. SD-SDI & DVB-ASI. 3.3/1.8V supply.
中文描述： 序列化的HD - SDI信號(hào)。標(biāo)清SDI
文件頁(yè)數(shù)： 21/39頁(yè)
文件大小： 631K
GENNUM CORPORATION
21498-1
21 of 39
G
3.2.2 Parallel Input in DVB-ASI Mode
When operating in DVB-ASI mode, (see Section 3.4), the
GS1532 automatically configures the input port for 10-bit
operation regardless of the setting of the 20bit/10bit pin.
The device will accept 8-bit data words on DIN[17:10] such
that DIN17 = HIN is the most significant bit of the encoded
transport stream data and DIN10 = AIN is the least
significant bit.
In addition, DIN19 and DIN18 will be configured as the
DVB-ASI control signals INSSYNCIN and KIN respectively.
See Section 3.4 for a description of these DVB-ASI specific
input signals.
DIN[9:0] will be high impdeance when the GS1532 is
operating in DVB-ASI mode.
3.2.3 Parallel Input in Data-Through Mode
When operating in Data-Through mode, (see Section 3.5),
the GS1532 passes data presented to the parallel input bus
to the serial output without performing any encoding or
scrambling.
The input data bus width accepted by the device in this
mode is controlled by the setting of the 20bit/10bit pin.
3.2.4 Parallel Input Clock (PCLK)
The frequency of the PCLK input signal required by the
GS1532 is determined by the input data format. Table 1
below lists the possible input signal formats and their
corresponding parallel clock rates. Note that DVB-ASI input
will always be in 10-bit format, regardless of the setting of
the 20bit/10bit pin.
TABLE 1 PARALLEL DATA INPUT FORMAT
INPUT DATA FORMAT
CONTROL SIGNALS
DOUT
[19:10]
DOUT
[9:0]
PCLK
20
bit
/10
bit
SD/HD
SMPTE_BYPASS
DVB_ASI
SMPTE MODE
20bit DEMULTIPLEXED SD
HIGH
HIGH
HIGH
LOW
LUMA
CHROMA
13.5MHz
10bit MULTIPLEXED SD
LOW
HIGH
LUMA /
CHROMA
HIGH
IMPEDANCE
27MHz
20bit DEMULTIPLEXED HD
HIGH
LOW
LUMA
CHROMA
74.25 or
74.25/1.001MHz
10bit MULTIPLEXED HD
LOW
LOW
LUMA /
CHROMA
HIGH
IMPEDANCE
148.5 or
148.5/1.001MHz
DVB-ASI MODE
10bit DVB-ASI
HIGH
HIGH
LOW
HIGH
DVB-ASI
DATA
HIGH
IMPEDANCE
27MHz
LOW
DATA-THROUGH MODE
20bit DEMULTIPLEXED SD
HIGH
HIGH
LOW
LOW
DATA
DATA
13.5MHz
10bit MULTIPLEXED SD
LOW
HIGH
DATA
HIGH
IMPEDANCE
27MHz
20bit DEMULTIPLEXED HD
HIGH
LOW
DATA
DATA
74.25 or
74.25/1.001MHz
10bit MULTIPLEXED HD
LOW
LOW
DATA
HIGH
IMPEDANCE
148.5 or
148.5/1.001MHz
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