![](http://datasheet.mmic.net.cn/390000/TSB42AA4I_datasheet_16839080/TSB42AA4I_12.png)
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2 ceLynx Overview
2.1
ceLynx Description
Consumer Electronics Link (ceLynx) is a high-performance 1394 link layer device designed specifically to
support advanced consumer electronics applications, particularly those applications which require the
transmission of Moving Picture Expert Group 2 (MPEG2) transport streams and encryption/decryption of
those streams across a 1394 network. The device supports both digital video broadcasting (DVB) and
DirecTV
type MPEG2 streams using the digital transmission content protection method (DTCP) method
of encryption, as well as digital video (DV) encoded streams. The ceLynx supports both the IEC 61883
standard for DVB and DV streams over 1394 and the 1394 Trade Association standard for DirecTV over
1394.
The ceLynx is also versatile enough to handle asynchronous data and asynchronous streams. A key feature
of the ceLynx is its ability to handle multiple data type streams simultaneously; the user may transport DVB,
DirecTV, DV data streams, and asynchronous data
simultaneously
. The ceLynx can also support multiple
streams of the same data type simultaneously, (for example, transmit or receive two DVB transport streams
or two DV streams).
The ceLynx is full duplex, allowing simultaneous playback and recording of audio/video data. Full duplex
support also includes the capability of using the DTCP method, simultaneously using
the
two embedded
M6 cipher modules. The large internal 8-Kbyte FIFO is very flexible, allowing the user to partition it into eight
independent first in first out (FIFOs) and allowing the user to determine the exact configuration of each of
these FIFOs to fit the application. Advanced features have been added to support program ID (PID) filtering
and packet insertions.
The ceLynx is also designed to interface seamlessly with popular MPEG2 decoder chipsets. This decreases
the design-in effort of customers when using these popular chipsets.
2.2
Key Features
DTCP content protection (TSB42AA4 only). A separate document explains the DTCP hardware
errata for TSB42AA4. It is available upon request to DTLA licensees only.
Interfaces directly to industry standard 400-, 200-, and 100-Mbps physical layer devices,
including Texas Instruments TSB41LV0X and TSB41AXX family of physical layer devices
Compliant with IEEE 1394-1995 and IEEE 1394a2000 standards
MPEG2 time stamp-based release, as described in IEC 61883-4
High-speed data interface (HSDI):
Byte-wide or serial mode
Two independent HSDI ports
Bidirectional
Several control modes for a variety of applications
Connects seamlessly to common MPEG2 decoder chipsets
16-bit microprocessor interface supports Motorola 68000/68020-style bus
Large 8K-byte FIFO can be configured up to eight independent Tx or Rx FIFOs
8K-byte FIFO supports the following data types:
DVB MPEG2 transport streams (IEC 61883-4)
DirecTV transport streams
DirecTV is a trademark of Hughes Communications, Inc.