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GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 E-mail: info@gennum.com
www.gennum.com
Revision Date: July 2003
Document No. 27360 - 2
PRELIMINARY DATA SHEET
G
KEY FEATURES
SMPTE 292M and SMPTE 259M-C compliant
descrambling and NRZI
→
NRZ decoding (with
bypass)
DVB-ASI sync word detection and 8b/10b decoding
auto-configuration for HD-SDI, SD-SDI and DVB-ASI
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
adjustable loop bandwidth
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
small footprint compatible with GS1561, GS1532,
GS9060 and GS9062
APPLICATIONS
SMPTE 292M Serial Digital Interfaces
SMPTE 259M-C Serial Digital Interfaces
DVB-ASI Serial Digital Interfaces
DESCRIPTION
The GS1560A is a reclocking deserializer with a serial loop-
through cable driver. When used in conjunction with the
GS1524 Automatic Cable Equalizer and the 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 GS1560A 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.
A 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 GS1560A 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 325M 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
function may be individually enabled or disabled via host
interface control.
GS1560A
HD-LINX
II
Multi-Rate Deserializer
with Loop-Through Cable Driver