IEEE1394 Просмотр технического описания (PDF) - Philips Electronics

Номер в каталоге

Компоненты Описание

Список матч

IEEE1394

IEEE 1394/Device Bay ATSC DTV receiver

Philips Electronics 

PDI1394L11 1394 A/V Link layer controller

• Full IEEE 1394-1995 compliant

• Hardware support for IEC 61883 standard

• A/V interface port supports high-speed (isochronous)

digital data streams

• Asynchronous interface port supports command and

control functions

• Compatible with any IEEE 1394-1995 100, 200 and

400 Mbits/s physical layer devices

Philips’ PDI1394L11, is an IEEE 1394-1995 link layer controller

featuring an embedded A/V layer interface. The A/V layer is

designed to pack and un-pack application data packets for

transmission over an IEEE 1394 bus using isochronous data transfers.

Application data is packetized according to IEC61883 specification

of digital interface for consumer electronic audio/video equipment.

The A/V layer interface is a byte wide port capable of

accommodating various MPEG2 and DV codecs. A byte wide host

interface is provided for internal register configuration as well as

performing asynchronous data transfers.

PDI1394P11 three-port Physical Layer Controller

• IEEE 1394-1995 compliant

• Three cable ports capable of 100 Mbits/s and 200 Mbits/s

data rates

• Energy saving power down feature offers lower power

consumption than competing devices

• Interfaces to any IEEE 1394 standard link layer controller

Integrated on the main board for output over 1394 port connections,

or on a Device Bay daughter card for output over a Device Bay signal

connector, the PDI1394P11 provides the analog physical layer

functions to connect to a three-port node in a 1394 application.

It manages bus initialization and arbitration cycles, as well as

transmission and reception of data bits. Supporting the IEEE 1394a

short arbitrated bus reset, the PDI1394P11 reduces reset times and

hence the risk of losing isochronous data.

TDA9829 IF downconverter

The TDA9829 DTV IF amplifier/converter chip provides the signal

stages for IF processing to the DVB standard, down-converting the

digital Quadrature Amplitude Modulation (QAM) signal to a

frequency matching the symbol rate. It features VCO for QAM

carrier recovery, internal and external AGC for DVB, and is

applicable for VSB (HDTV) IF and OFDM downconversion.

The board supports standard 6 MHz VHF/

UHF digital terrestrial TV channels in the

38.9 MHz to 45.75 MHz frequency range.

IF gain is controlled using three AC-coupled,

differential amplifier stages, with a feedback

stage controlled by emitter-degeneration.

87C654 microcontroller

Together with an FPGA, the microcontroller

performs basic data, address and control signal

handling, as well power-up and reset functions.

A derivative of the 80C51 microcontroller

family, with the same instruction set, it has a

non-volatile 16 k x 8 EPROM and a volatile

256 x 8 read/write data memory, four 8-bit

I/O ports, two 16-bit timer/event counters,

nested multiple interrupts, an I2C-bus interface

and on-board UART.

The IEC61883 standard

Today, transmission of digital video and audio

data is commonplace, demanding standards to

ensure compatibility of equipment and

interfaces. IEC61883 specifies a digital

interface for consumer electronic audio/video

equipment. As a major contributor to the

IEC61883 protocol Philips has in-depth

expertise in the implementation of IEC61883

over IEEE 1394.

The IEC61883 standard describes the general

packet format, data flow and connection

management for audio/visual data. General

transmission rules for control commands are

also specified, as are the transmission protocol

and control commands for digital audio and

video equipment connecting via the IEEE

1394 interface. Data packetization and

transmission timing for MPEG2 transport

streams transmitted over the IEEE 1394

interface and specifications for the IEEE 1394

packet itself are also covered by IEC61883.

Share Link: