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GS2970 Datasheet(PDF) 39 Page - Semtech Corporation

Part # GS2970
Description  3Gb/s, HD, SD SDI Receiver Complete with SMPTE Audio and Video Processing
PDF  145 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

GS2970 Datasheet(HTML) 39 Page - Semtech Corporation

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GS2970 3Gb/s, HD, SD SDI Receiver Complete with
SMPTE Audio and Video Processing
Data Sheet
47478 - 4
September 2012
39 of 145
SYNCOUT is HIGH whenever a K28.5 sync character is output from the device.
WORDERR is HIGH whenever the device has detected a running disparity error or
illegal code word.
4.9.4 Parallel Output in Data-Through Mode
This mode is enabled when the SMPTE_BYPASS and DVB_ASI pins are LOW.
In this mode, data is passed to the output bus without any decoding, descrambling or
word-alignment.
The output data width (10-bit or 20-bit) is controlled by the setting of the 20bit/10bit pin.
NOTE: In order to use Data-Through Mode, a 3G-B input signal must not be connected
at the input of the device when the switch is made from Auto Mode to Data-Through
Mode.
4.9.5 Parallel Output Clock (PCLK)
The frequency of the PCLK output signal of the GS2970 is determined by the output data
rate and the 20bit/10bit pin setting. Table 4-6 lists the output signal formats according to
the data format selected in Manual mode (AUTO/MAN bit in the host interface is set
LOW), or detected in Auto mode (AUTO/MAN bit in the host interface is set HIGH).
Table 4-6: GS2970 PCLK Output Rates
Output Data
Format
Pin/Control Bit Settings
PCLK Rate
20bit/
10bit
RATE_DET0
RATE_DET1
SMPTE_
BYPASS
DVB-ASI
20-bit demultiplexed
HD format
HIGHLOW
LOWHIGH
LOW
74.25 or
74.25/1.001MHz
20-bit data output
HD format
HIGH
LOW
LOW
LOW
LOW
74.25 or
74.25/1.001MHz
20-bit demultiplexed
SD format
HIGHHIGHXHIGHLOW
13.5MHz
20-bit data output
SD format
HIGHHIGHX
LOW
LOW
13.5MHz
20-bit demultiplexed
3G format
HIGHLOW
HIGHHIGH
LOW
148.5 or
148.5/1.001MHz
10-bit multiplexed
3G DDR format
LOW
LOW
HIGHHIGH
LOW
148.5 or
148.5/1.001MHz
10-bit multiplexed
HD format
LOW
LOW
LOW
HIGH
LOW
148.5 or
148.5/1.001MHz
10-bit data output
HD format
LOW
LOW
LOW
LOW
LOW
148.5 or
148.5/1.001MHz
10-bit multiplexed
SD format
LOW
HIGHXHIGH
LOW
27MHz



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