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Features
* * * * * * * * * * * * * * *
Baseline JPEG Compression/Decompression Image Resize Engine 16-bit YC Digital Interface for CMOS Imager Input and Display Output Compatible with Various Types of Display Devices SDRAM Interface - Support from 16M Bits to 256M Bits Support for all Flash Card Interfaces (Atmel DataFlash(R), MMC, SD, SSFDC, CompactFlash, Memory Stick) USB and USART Interfaces for PC Camera Applications 4 Dedicated External Interrupts, Timer Clock Input and Wake-up Pin Serial Interface for Controlling Camera Components 32 Pins for General-purpose I/O Up to 2M Bytes Program Space Support for RTOS All Low-level Software, Application Samples are Provided 208-pin BGA Package 1.8-volt Core and 3.3-volt I/O Operation
HighPerformance Digital Camera Processor AT76C112
Figure 1. Typical DSC Application Using AT76C112
* Digital Inputs * Control * Push Buttons
SDRAM
SDRAM I/F
GPIO
YC I/F
From Imager/ To Display
Summary
CDS A/D RS232 Port (PC) USB (PC)
Serial Camera I/F
MPix AT76C112
USART
USB External Memory I/F
Flash Card I/F * MMC/SPI/SD * SSFDC * DataFlash * Memory Stick
Flash
* Flash * SRAM * CompactFlash
Rev. 2372AS-DIGICAM-08/02
Note: This is a summary document. A complete document is available under NDA. For more information, please contact your local Atmel sales office.
1
Description
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(R) 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 computational-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.
Capabilities
* * * * * * * * * *
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 A current in sleep mode
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AT76C112
2372AS-DIGICAM-08/02
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(c) Atmel Corporation 2002. 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. ATMEL (R) and DataFlash (R) are the registered trademarks of Atmel. ARM (R) is the registered trademark of ARM, Ltd. Other terms and product names may be the trademarks of others.
Printed on recycled paper.
2372AS-DIGICAM-08/02 xM

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