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CXD1948R

IEEE1394 Link Layer LSI for DVB and DSS

Sony Semiconductor 

CXD1948R

IEEE1394 Link Layer LSI for DVB and DSS

Description

The CXD1948R is a Link Layer LSI conforming to

the IEEE1394 serial bus standard. During transmission,

the MPEG2 transport stream is time stamped,

transformed to IEEE1394 format and sent to the

IEEE1394 Phy IC.

During reception, the signal from IEEE1394 is kept

in the built-in FIFO, synchronized to the time stamp

value and output.

This IC utilizes Apple Computer’s Fire Wire

technology.

Features

• Conforms to IEEE1394 serial bus standard

• Supports DVB and DSS transport streams

• Dedicated ports for asynchronous data/isochronous

data

• Isochronous data inserted from asynchronous data

port

• Smoothing buffer function

• Large capacity FIFO

Isochronous transmit/receive FIFO 960 × 32 bits

Asynchronous transmit FIFO

30 × 33 bits

Asynchronous receive FIFO

36 × 33 bits

Isochronous Insert Packet Transmit Buffer

47 × 33 bits

• CIP header automatic attachment/detection

100 pin LQFP (Plastic)

Absolute Maximum Ratings (Ta = 25°C)

• Supply voltage VDD

Vss – 0.5 to +4.6

V

• Input voltage VI Vss – 0.5 to VDD + 0.5 V

• Output voltage VO Vss – 0.5 to VDD + 0.5 V

• Operating temperature

Topr

–20 to +75

°C

• Storage temperature

Tstg

–55 to +150

°C

Recommended Operating Conditions

• Supply voltage VDD

3.0 to 3.6

V

• Operating temperature

Topr

–20 to +75

°C

Applications

• Digital interface for D-STB

• Digital interface for D-VHS

Structure

Silicon gate CMOS IC

Fire Wire is a registered trademark of Apple Computer Corporation, USA

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by

any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the

operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

–1–

E96844-PS

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