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.
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E96844-PS