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GS9090B Datasheet(PDF) 22 Page - Gennum Corporation

Part # GS9090B
Description  GenLINX짰 III 270Mb/s Deserializer for SDI
Download  71 Pages
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Manufacturer  GENNUM [Gennum Corporation]
Direct Link  http://www.gennum.com
Logo GENNUM - Gennum Corporation

GS9090B Datasheet(HTML) 22 Page - Gennum Corporation

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GS9090B Data Sheet
40749 - 2
January 2007
22 of 71
3. Detailed Description
Functional Overview
Serial Digital Input
Clock and Data Recovery
Serial-To-Parallel Conversion
Modes Of Operation
SMPTE Functionality
DVB-ASI Functionality
Data-Through Functionality
Additional Processing Features
Internal FIFO Operation
Parallel Data Outputs
Programmable Multi-Function Outputs
GS9090B Low-latency Mode
GSPI Host Interface
JTAG Operation
Device Power Up
3.1 Functional Overview
The GS9090B is a 270Mb/s reclocking deserializer with an internal FIFO and
programmable multi-function output port. The device has two basic modes of
operation. In Auto mode, the GS9090B can automatically detect SMPTE or
DVB-ASI data streams at its input. In Manual mode, the device can be set to
process SMPTE or DVB/ASI data streams.
The digital signal processing core handles ancillary data detection/indication, error
detection and handling (EDH), SMPTE352M extraction, and automatic video
standards detection. These features are all enabled by default, but may be
individually disabled via internal registers accessible through the GSPI host
interface.
The provided programmable multi-function output pins may be configured to output
various status signals including H, V, and F timing, ancillary data detection, EDH
detection, and a FIFO load pulse. The internal FIFO supports 4 modes of
operation, which may be used for data alignment, data delay, MPEG packet
extraction, or ancillary data extraction.
The GS9090B contains a JTAG interface for boundary scan test implementations.
3.2 Serial Digital Input
The GS9090B contains a current mode differential serial digital input buffer. The
input buffer has internal 50
Ω termination resistors, which are connected to ground
via the TERM pin.
If the input signal is AC coupled to the device, the signal source common mode
level will be set internally to typically 1.45V. If the input signal is DC coupled to the
device, the internal biasing will be ignored. Please see AC Electrical
Characteristics for Common Mode range and swing characteristics.


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