PTM1300 데이터 시트보기 (PDF) - Philips Electronics

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PTM1300

Programmable Media Processor

Philips Electronics 

The AI unit supports up to two channels of audio input. Mono and

16-bit stereo formats are supported. The AO unit delivers up to eight

channels of output using one external pin per channel. Output of 16-

bit and 32-bit stereo and mono formats are supported. The AO unit

can also be used to control highly integrated PC codecs. Software sup-

port for decode and output of Dolby ProLogic® and Dolby Digital

(AC-3)® multichannel audio is provided through optional TriMedia

application library modules.

SPDIF output—The SPDIF out unit allows output of a one-bit

high-speed serial datastream. The primary application is output of dig-

ital audio data in SPDIF format to external audio equipment. Since

datastream content is entirely software controlled, the SPDIF out unit

can also be used as a general purpose high-speed datastream output

device such as a UART.

The SPDIF out unit supports two-channel linear PCM audio, one or

more Dolby Digital six-channel datastreams (embedded per Project

1937), or one or more MPEG-1 or MPEG-2 audio streams (embed-

ded per Project 1937). It supports arbitrary, programmable sample

rates independent of and asynchronous to the AO unit sample rate.

Image coprocessor—The image coprocessor (ICP) unit off-loads the

CPU of cycle-consuming image processing tasks such as copying an

image from SDRAM to a host video frame buffer. The ICP unit can

operate as either a memory-to-memory or memory-to-PCI coproces-

sor device. In both modes, it can perform horizontal or vertical image

filtering and scaling and can optionally perform YUV to RGB color-

space conversion for screen display (in memory-to-PCI mode).

The ICP also provides display support for live video in occluded win-

dows. The number and sizes of windows processed are limited only by

available bandwidth. The final resampled and converted images are

transmitted over the PCI bus to an optional off-chip graphics

card/frame buffer.

Variable length decoder—A variable length decoder (VLD) unit

operates as a memory-to-memory coprocessor to decode Huffman-

encoded MPEG-1 and MPEG-2 video datastreams. After processing,

the VLD unit outputs a decoded stream optimized for MPEG-2

decompression software. This minimizes communications with the

CPU where other steps of MPEG processing are performed.

DVD descrambler—The on-chip digital versatile disc (DVD)

descrambler unit provides DVD authentication and descrambling.

This enables developers to add low-cost, flexible DVD video playback

functions into multimedia products with minimal effort.

I2C interface—An I2C interface provides an external I2C (or compat-

ible interface) for use in hardware or software operation modes. In

hardware mode, it can connect to and control a variety of different

I2C multimedia devices allowing configuration and status inspection

of off-chip peripheral video devices such as digital encoders and

decoders, digital cameras, parallel I/O expanders, and more. I2C soft-

ware mode enables full software control of the I2C interface. The

interface can also be used to read the boot program from an off-chip

EEPROM.

Synchronous serial interface—A synchronous serial interface (SSI)

unit provides serial access for a variety of multimedia and data com-

munications applications. It contains the buffers and logic necessary to

interface with simple analog modem front ends. When used with a

TriMedia V.34 application, the SSI unit can provide fully V.34-com-

pliant modem capability. Alternatively, it can be connected to an

ISDN interface chip to provide advanced digital modem capabilities.

Timers—TM-1300 provides four general purpose timers useful in

counting/timing events such as CPU clock cycles, data/instruction

breakpoints, cache tracing, audio/video clocks, and more. Three timers

are available to programmers, the fourth is reserved for use by system

software.

PCI/XIO bus interface—A PCI/XIO interface connects the CPU

and on-chip peripheral units to a PCI/XIO bus. In embedded appli-

cations where TM-1300 is the main processor, this interface enables

TM-1300 to access off-chip devices implementing functions not pro-

vided on-chip. In host-based applications, the interface connects TM-

1300 to a standard PCI bus, allowing placement directly on the host

mainboard or a plug-in card. For low-cost standalone systems, XIO

support allows glueless connection of eight-bit x86 or 68K devices

such as ROM, Flash, EEPROM, UARTs, and more.

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