AT76C120 [ATMEL]

High- Performance Digital Imaging and Video Processor; 高性能数字成像和视频处理器


型号：	AT76C120
厂家：	ATMEL
描述：	High- Performance Digital Imaging and Video Processor 高性能数字成像和视频处理器
文件：	总5页 (文件大小：74K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Features

• Supports Image (Up to 16 Mpixels) and Video Playback Applications

• ARM7TDMI^®CPU Running at a Maximum Rate of 78 MHz

• 16/8-bit CCIR Digital Video Input Interface for Video/Still-Picture Capture

• Video Encoder for NTSC/PAL TV Signal

• Digital Video Outputs Include: Composite, 16/8-bit YC (CCIR-656), RGB 565, 24-bit

RGB, Component (Y/Pr/Pb), VESA Up to XGA Resolutions

• Integrated Triple Video DAC for Composite, Component, RGB, or S-Video Outputs

• Direct Interface to Epson, Casio, or AU LCDs

• Image Scaling and Rotation Hardware

• Baseline JPEG Compression/Decompression

• MPEG-1 Encode/Decode at 24 fps VGA

• MPEG-4 Codec Simple Profile at 30 fps CIF Resolution

• SDRAM Interface Supports Up to 512 Mbit Devices

• Unified Memory Architecture (All Program and Data Stored in SDRAM)

• Static Memory Controller (Flash/SRAM) Supports Up to Four 16 MB Devices

• Support for All Flash Card Interfaces (MMC/SD, Memory Stick Pro^™,

SSFDC/Smartmedia, CompactFlash^®with IDE I/O Mode Support)

• Audio Data Interface for Connection to External Stereo ADC/DAC

• USB 2.0 High-speed Slave Controller for PC Card Reading Applications - OR -

• USB 1.1 Full-speed Host/Slave Controller for Direct Connection to Digital Cameras

• USART Interface

High-

Performance

Digital Imaging

and Video

Processor

• Serial Peripheral Interface for Loading Boot Code and Controlling External Devices

• Three General-purpose Timers for Waveform Generation and Event Monitoring

• Programmable Watchdog Timer

AT76C120

Summary

• Up to Eight External Interrupts

• Up to 102 Pins Configurable as General-purpose I/Os

• All Low-level Software and Application Samples are Provided

• 1.8 V Core and 3.3 V I/O Operation

• 208-ball BGA Package

Figure 1. Typical DSC Application Using The AT76C120

Legend

SDRAM

PLL

Filter

Subsystems

ICs

up to

27 MHz

SDRAM Interface

78 MHz Clock, CL=2

Imager

and Lens

Subsystem

Display

Interface

Flash

Cards

Scaler

JPEG

Codec

MPEG-1 MPEG-4

Codec Codec

Direct

LCD Panel

Subsystem

SRAM

Triple

DAC

TV Filters

to PC

USB

USART

SPI

to PC

4KB

Data RAM

Interrupt

Controller

Push-

buttons,

ARM7TDMI

Serial

EEPROM

(boot code)

78 MHz

LEDs, etc.

8KB

Cache

Timers

Audio

Data

Interface

Audio

Codec

Watchdog

Timer

System

12 MHz

PLL

Filter

5676AS–MPIXLY–06/04

Note: This is a summary datasheet. A complete document is available

under NDA. For more information, please contact your local Atmel Sales

Office.

Description

The AT76C120 is a highly integrated solution for still-image and video playback applica-

tions. It can also operate as a video capture device for low-cost Personal Video

Recording (PVR) applications. It combines a number of functions that are required in

such devices:

•

The design is based on an ARM7^®microprocessor that controls the entire chip. A

number of hardware resources, controlled by the ARM processor, perform digital

imaging functions such as image signal processing, JPEG coding/decoding, MPEG-

1 coding/decoding, DMA access to the SDRAM, and video encoding. All of these

computationally-intensive functions are implemented in hardware which can be

programmed according to user specifications, thus allowing the ARM processor to

be free for other user-defined functions. The processor has 8 KB of internal

instruction/data cache that helps it to operate efficiently and use minimal SDRAM

bandwidth.

•

The device also features Personal Video Recording capabilities. It has a 16/8-bit

CCIR digital video input interface (shared with the display interface) that can capture

still-image/video data from either a CMOS sensor or a video decoder. The video

data can then be compressed using the MPEG engine.

The device has numerous display capabilities. It has an integrated video encoder

(double sampling) and 10-bit differential video DACs running at 78 MHz to support

direct display to high-definition TVs and projectors at different VESA rates up to

XGA (1024 x 768) resolutions. The device also has a 24-bit RGB output to interface

to flat-panel TVs (LCDs and Plasma). It supports both square pixel and CCIR-type

formats and can display in NTSC or PAL modes with the same crystal. It also has an

LCD controller that supports a variety of LCD panels (Epson, Casio, AU) without the

need for external ICs. Finally, it has an 8/16-bit CCIR-type output interface.

•

The device has a high-performance image scaler that can do up-and-down scaling

at floating point resolutions. This is very useful for playback applications, where

images of arbitrary sizes need to be displayed on fixed resolution displays. In

addition, the device supports hardware rotation, as well as flipping and mirroring in

both vertical and horizontal dimensions. It takes about 120 ms to rotate a 2M image

(1600 pixels) in any direction.

The AT76C120 has a hardware JPEG compression/decompression engine that can

decode a 2M pixel image in less than 150 ms. Non-standard Huffman JPEG tables

are also supported using a combination of hardware and software resources. The

engine can also do motion JPEG encoding and decoding.

•

The integrated MPEG decoder can be used to play video clips taken from digital

cameras and mobile phones. It supports Simple Profile MPEG-4 bitstreams at 30

fps CIF (I and P frames) and MPEG-1 video at 24 fps VGA (I frames only).

The device utilizes a unified memory architecture using the SDRAM to process,

capture, and play images and video, as well as to store program code and variables.

It supports SDRAM configurations of up to 512 Mbits.

A static memory controller is included that supports up to four 16 MB Flash or

SRAM devices. Both 8-bit and16-bit data buses are supported, with data accesses

of up to 32 bits. The number of wait states and setup, hold, and data float times are

programmable on a per device (chip select) basis.

•

The device supports all Flash cards, including MultiMedia Card (MMC), Secure

Digital (SD), Memory Stick Pro^™, Smartmedia/SSFDC/NAND Flash, and Compact

Flash, including IDE I/O mode for streaming video. The Flash card interfaces can

support read/write operations at the maximum speeds specified by the Flash cards.

Data transfers between the Flash cards and the SDRAM are handled using high-

AT76C120

5676AS–MPIXLY–06/04

AT76C120

speed DMAs with FIFOs that leave the main processor free for other system

applications.

•

The I²S-compatible audio data interface allows the device to connect with an

external stereo ADC/DAC to capture or play voice or audio. The device can encode

captured audio in various popular formats, and can package it in the same bitstream

as the video or the compressed JPEG pictures. It can also play back stand-alone

audio, such as MP3 files or audio embedded in MPEG bitstreams.

The USB 1.1 full-speed host controller allows the playback device to connect

directly to digital cameras and either display images from the DSC or download

them to the playback device. The USB 1.1 full-speed slave controller can be used to

connect to a PC for downloading of images from the playback device to the PC.

•

The USB 2.0 high-speed slave controller can also be used to connect to a PC for the

downloading of images from the playback device to the PC. This interface is

mutually exclusive from the USB 1.1 interfaces (see “Part Versions” below).

An USART interface is included for serial communication. It supports standard baud

rates of up to 460.8 Kbps or non-standard rates of up to 4.875 Mbps in

asynchronous mode. It supports rates of up to19.5 Mbps in synchronous mode.

The serial peripheral interface (SPI) is used to boot from an external EEPROM.

Once the boot code is loaded inside the program memory, the CPU can download

its code from any peripheral supported by the device, including non-volatile storage

media. With two chip select pins, the SPI can also be used to control other external

devices at speeds of up to 19.2 Mbps with 64-bit transfers. Throughput decreases if

the transfer size is reduced or the delay between transfers is increased.

•

Three 16-bit general-purpose timers are included and can be used to generate

interrupts to the internal CPU. They can generate waveforms on their associated

pins via Pulse-width Modulation (PWM) or other techniques. They can also monitor

and count external events on these pins.

A dedicated watchdog timer is available which can provide an interrupt, an event on

an external pin, or a reset to the internal CPU in the event that software is not

responding as expected. Write access to the watchdog is protected by control

access keys to prevent corruption of the watchdog should an error condition occur.

The device provides up to eight external interrupt pins, depending on the system

configuration, which can be handled by the interrupt controller as either edge or

level sensitive.

•

Up to 102 pins can also be configured as GPIOs, depending on the application.

During normal operation, power consumption may be minimized by disabling the

clock of any internal module that is not in use. In order to further reduce power

consumption, the main CPU clock can be divided to run at a slower speed. In order

to minimize power consumption when the device is not in use, a “sleep mode” is

available that halts the operation of all logic and shuts down the oscillators and

PLLs. Recovery from sleep mode occurs via the WKP (“wakeup”) pin, at which time

the device begins execution from its previous state.

Part Versions

The AT76C120 device comes in two versions. One version has USB 1.1 full-speed host

and slave interfaces, while the other version has a USB 2.0 high-speed slave interface.

The corresponding part numbers are the AT76C120-U1 and the AT76C120-U2, respec-

tively. The pin configuration of each version is mostly the same, but with a few

differences as noted below.

Technology

•

The device is fabricated in a 0.18 micron process. It is expected that the device will

operate at less than 60 mA when fully active (video compression/decompression).

5676AS–MPIXLY–06/04

•

The core requires a 1.8 V power supply, while most I/O pads require a 3.3 V supply.

The package is a 208-ball BGA.

AT76C120

5676AS–MPIXLY–06/04

Atmel Corporation

Atmel Operations

2325 Orchard Parkway

San Jose, CA 95131, USA

Tel: 1(408) 441-0311

Fax: 1(408) 487-2600

Memory

RF/Automotive

Theresienstrasse 2

Postfach 3535

74025 Heilbronn, Germany

Tel: (49) 71-31-67-0

Fax: (49) 71-31-67-2340

2325 Orchard Parkway

San Jose, CA 95131, USA

Tel: 1(408) 441-0311

Fax: 1(408) 436-4314

Regional Headquarters

Microcontrollers

2325 Orchard Parkway

San Jose, CA 95131, USA

Tel: 1(408) 441-0311

Fax: 1(408) 436-4314

1150 East Cheyenne Mtn. Blvd.

Colorado Springs, CO 80906, USA

Tel: 1(719) 576-3300

Europe

Atmel Sarl

Route des Arsenaux 41

Case Postale 80

CH-1705 Fribourg

Switzerland

Tel: (41) 26-426-5555

Fax: (41) 26-426-5500

Fax: 1(719) 540-1759

Biometrics/Imaging/Hi-Rel MPU/

High Speed Converters/RF Datacom

Avenue de Rochepleine

La Chantrerie

BP 70602

44306 Nantes Cedex 3, France

Tel: (33) 2-40-18-18-18

Fax: (33) 2-40-18-19-60

BP 123

38521 Saint-Egreve Cedex, France

Tel: (33) 4-76-58-30-00

Fax: (33) 4-76-58-34-80

Asia

Room 1219

Chinachem Golden Plaza

77 Mody Road Tsimshatsui

East Kowloon

Hong Kong

Tel: (852) 2721-9778

Fax: (852) 2722-1369

ASIC/ASSP/Smart Cards

Zone Industrielle

13106 Rousset Cedex, France

Tel: (33) 4-42-53-60-00

Fax: (33) 4-42-53-60-01

1150 East Cheyenne Mtn. Blvd.

Colorado Springs, CO 80906, USA

Tel: 1(719) 576-3300

Japan

9F, Tonetsu Shinkawa Bldg.

1-24-8 Shinkawa

Chuo-ku, Tokyo 104-0033

Japan

Tel: (81) 3-3523-3551

Fax: (81) 3-3523-7581

Fax: 1(719) 540-1759

Scottish Enterprise Technology Park

Maxwell Building

East Kilbride G75 0QR, Scotland

Tel: (44) 1355-803-000

Fax: (44) 1355-242-743

Literature Requests

www.atmel.com/literature

Disclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard

warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any

errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and

does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are

granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use

as critical components in life support devices or systems.

sidiaries. ARM^®, ARM7^®, and ARM7TDMI^®are the registered trademarks of ARM, Ltd. Inc. CompactFlash^®is the registered trademark of Sandisk

Corporation. Memory Stick Pro^™is the trademark of Sony Electronics Inc. Other terms and product names may be the trademarks of others.

Printed on recycled paper.

5676AS–MPIXLY–06/04

AT76C120 [ATMEL]

相关型号：

AT76C120-1DM

AT76C120-1PC

AT76C120-1PI

AT76C120-2DM

AT76C120-2PC

AT76C120-2PI

AT76C120-2RC

AT76C120-2RI

AT76C171-35DC

AT76C171-35DI

AT76C171-35DM

AT76C171-35JC