AT76C112 Просмотр технического описания (PDF) - Atmel Corporation

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AT76C112

High-Performance Digital Camera Processor

Atmel Corporation 

Description

Capabilities

The AT76C112 is a highly integrated solution for digital camera and image playback

devices. It combines a number of functions that are required for implementing such

devices.

• Image data acquisition from CMOS imagers

• Image display

• Image processing and image storing

• Overall system management

• Control of general-purpose I/O functions

• Data communication

• Control of user functions

• On-screen display

It also provides a large number of interfaces that allow equipment manufacturers to

directly access a variety of devices that may be present in a digital camera or image

playback system.

• Communication with PCs

• Communication with Flash cards

• Serial communication ports for controlling other devices in the system

The design is based on an ARM® microprocessor that controls the entire chip. A number

of hardware resources, controlled by ARM, perform digital imaging functions such as

JPEG coding/decoding, image resizing, and DMA access to SDRAM. All these compu-

tational-intensive functions are implemented in hardware which can be programmed

according to user specifications, thus allowing ARM to be free for other user-defined

functions.

• Supports up to 16 megapixel CMOS imagers

• Interfaces to 16- to 256-Mbit SDRAM, one or two pieces

• 15 frames/sec capture mode (VGA resolution)

• Up to 1.5M bytes/sec read/write from/to Flash cards

• 2M bytes external Flash ROM for program space

• 2M bytes external SRAM for program/working space (optional)

• Full-speed USB interface (mass storage and image class)

• Maximum 80 mA current in normal operation

• 1 - 5 mA in standby mode

• 50 - 100 µA current in sleep mode

2 AT76C112

2372AS–DIGICAM–08/02

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