CY7C9235A Datasheet: SMPTE-259M/DVB-ASI Scrambler/Controller





CY7C9235A SMPTE-259M/DVB-ASI Scrambler/Controller Datasheet

Part Number CY7C9235A
Description SMPTE-259M/DVB-ASI Scrambler/Controller
Manufacture Cypress Semiconductor
Total Page 8 Pages
PDF Download Download CY7C9235A Datasheet PDF

Features: CY7C9235A SMPTE-259M/DVB-ASI Scrambler/ Controller Features • Fully compatibl e with SMPTE-259M • Fully compatible with DVB-ASI • Operates from a single +5V supply • 44-pin PLCC package • Encodes both 8- and 10-bit parallel di gital streams for 27M characters/sec (2 70 Mbits/sec serial) • Operates with CY7B9234 SMPTE HOTLink serializer/tr ansmitter This device performs both TRS (sync) detection and filtering, data s crambling with the SMPTE-259M ×9 + ×4 + 1 algorithm, and NRZ-to-NRZI encodin g. These functions operate at a 27 MHz character rate. For those systems opera ting with non-SMPTE-259M compliant vide o streams (or for diagnostic purposes), the scrambler and NRZI encoding functi ons can be disabled. DVB-ASI Operation The CY7C9235A also contains the necessa ry multiplexers, control inputs, and ou tputs, to sequence out a DVB-ASI compli ant video stream. DVB-ASI operation is enabled through activation of a single input signal. This allows a single serial output port to support both SMPTE and.

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CY7C9235A
Features
• Fully compatible with SMPTE-259M
• Fully compatible with DVB-ASI
• Operates from a single +5V supply
• 44-pin PLCC package
• Encodes both 8- and 10-bit parallel digital streams for
27M characters/sec (270 Mbits/sec serial)
• Operates with CY7B9234 SMPTE HOTLink
serializer/transmitter
• ×9 + ×4 + 1 scrambler and NRZI encoder may be
bypassed for raw data output
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Functional Description
SMPTE-259M Operation
The CY7C9235A is a CMOS integrated circuit designed to
encode SMPTE-125M bit-parallel digital characters (or other
data formats) using the SMPTE-259M encoding rules.
Following encoding, the characters are output as bit-parallel
characters ready for serialization. The encoded outputs of the
CY7C9235A are designed to be directly mated to a CY7B9234
HOTLink transmitter, which then converts the bit-parallel
characters into a SMPTE-259M compatible high-speed serial
data stream.
SMPTE-259M/DVB-ASI
Scrambler/Controller
This device performs both TRS (sync) detection and filtering,
data scrambling with the SMPTE-259M ×9 + ×4 + 1 algorithm,
and NRZ-to-NRZI encoding. These functions operate at a 27
MHz character rate. For those systems operating with
non-SMPTE-259M compliant video streams (or for diagnostic
purposes), the scrambler and NRZI encoding functions can be
disabled.
DVB-ASI Operation
The CY7C9235A also contains the necessary multiplexers,
control inputs, and outputs, to sequence out a DVB-ASI
compliant video stream. DVB-ASI operation is enabled
through activation of a single input signal. This allows a single
serial output port to support both SMPTE and DVB data
streams under software or hardware control.
In DVB-ASI mode the CY7C9235A operates with two enable
signals (ENA and ENN) to allow data to be presented from
either synchronous (clocked) or asynchronous FIFOs. When
data is not available, the CY7C9235A ensures that the proper
fill character (K28.5) is generated by the attached CY7B9234
serializer.
The CY7C9235A operates from a single +5V supply. It is
available in a 44-pin PLCC space saving package.
Logic Block Diagram
PD9(SVS)
PD8
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0(SC/D)
TRS_FILT
SC/D_EN
SVS_EN
BYPASS
DVB_EN
ENA
ENN
CKW
OE
10 10 10
10 10
TRS_DET
Q9(SVS)
Q8
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0(SC/D)
ENA_OUT
Cypress Semiconductor Corporation • 3901 North First Street • San Jose, CA 95134 • 408-943-2600
Document #: 38-02082 Rev. **
Revised October 13, 2003

                    
  






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