Features
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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
®
, 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
High-
Performance
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.
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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.
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•
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.
Capabilities
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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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Web Site
http://www.atmel.com
© 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
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components in life support devices or systems.
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®
and DataFlash
®
are the registered trademarks of Atmel.
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®
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of others.
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2372AS–DIGICAM–08/02
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