GS1559_08 Datasheet, PDF (1/71 Pages) Gennum Corporation – HD-LINX II Multi-Rate Deserializer with Loop-Through Cable Driver

GS1559 HD-LINX™ II Multi-Rate Deserializer with Loop-Through Cable Driver
Key Features
• SMPTE 292M and SMPTE 259M-C compliant
descrambling and NRZI →NRZ decoding (with bypass)
• DVB-ASI 8b/10b decoding
• Auto-configuration for HD-SDI and SD-SDI
• Serial loop-through Cable Driver output selectable as
reclocked or non-reclocked
• Dual serial digital input buffers with 2 x 1 mux
• Integrated serial digital signal termination
• Integrated Reclocker
• Automatic or Manual rate selection/indication
(HD/SD)
• Descrambler Bypass option
• User selectable additional processing features
including:
• CRC, TRS, ANC data checksum, line number and EDH
CRC error detection and correction
• Programmable ANC data detection
• Illegal code remapping
• Internal Flywheel for noise immune H, V, F extraction
• FIFO load Pulse
• 20-bit/10-bit CMOS parallel output data bus
• 148.5MHz / 74.25MHz / 27MHz / 13.5MHz parallel
digital output
• Automatic standards detection and indication
• 1.8V core Power Supply and 3.3V Charge Pump Power
Supply
• 3.3V digital I/O supply
• JTAG test interface
• Available in a Pb-free package
• Small footprint (11mm x 11mm)
Applications
• SMPTE 292M Serial Digital Interfaces
• SMPTE 259M-C Serial Digital Interfaces
• DVB-ASI Serial Digital Interfaces
Description
The GS1559 is a reclocking Deserializer with a serial
loop-through Cable Driver. When used in conjunction with
the GS1574 Automatic Cable Equalizer and the
GO1555/GO1525* Voltage Controlled Oscillator, a receive
solution can be realized for HD-SDI, SD-SDI and DVB-ASI
applications.
In addition to reclocking and deserializing the input data
stream, the GS1559 performs NRZI-to-NRZ decoding,
descrambling as per SMPTE 292M/259M-C, and word
alignment when operating in SMPTE mode. When
operating in DVB-ASI mode, the device will word align the
data to K28.5 sync characters and 8b/10b decode the
received stream.
Two serial digital input buffers are provided with a 2x1
Multiplexer to allow the device to select from one of two
serial digital input signals.
The Integrated Reclocker features a very wide Input Jitter
Tolerance of ±0.3 UI (total 0.6 UI), a rapid asynchronous
lock time, and full compliance with DVB-ASI data streams.
An integrated Cable Driver is provided for serial input
loop-through applications and can be selected to output
either buffered or reclocked data. This Cable Driver also
features an output mute on loss of signal, high-impedance
mode, adjustable signal swing, and automatic dual
slew-rate selection depending on HD/SD operational
requirements.
The GS1559 also includes a range of data processing
functions such as error detection and correction, automatic
standards detection, and EDH support. The device can also
detect and extract SMPTE 352M payload identifier packets
and independently identify the received video standard.
This information is read from internal registers via the Host
Interface port.
Line-based CRC errors, line number errors, TRS errors, EDH
CRC errors and ancillary data checksum errors can all be
detected. A single ‘DATA_ERROR’ pin is provided which is
a logical 'OR'ing of all detectable errors. Individual error
status is stored in internal ‘ERROR_STATUS’ registers.
Finally, the device can correct detected errors and insert
new TRS ID words, line-based CRC words, ancillary data
checksum words, EDH CRC words, and line numbers.
Illegal code re-mapping is also available. All processing
functions may be individually enabled or disabled via Host
Interface control.
GS1559 HD-LINX™ II Multi-Rate Deserializer with
Loop-Through Cable Driver
Data Sheet
30572 - 8
July 2008
www.gennum.com
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