ATMEL AT76C112

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
HighPerformance
Digital Camera
Processor
Figure 1. Typical DSC Application Using AT76C112
CDS
A/D
RS232
Port
(PC)
USB (PC)
SDRAM
• Digital Inputs
• Control
• Push Buttons
SDRAM I/F
GPIO
Serial
Camera
I/F
AT76C112
YC
I/F
From Imager/
To Display
Summary
MPix
AT76C112
USART
USB
External
Memory I/F
Flash
• Flash
• SRAM
• CompactFlash
Flash
Card
I/F
• MMC/SPI/SD
• SSFDC
• DataFlash
• Memory Stick
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
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Image display
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Image processing and image storing
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Overall system management
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Control of general-purpose I/O functions
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Data communication
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Control of user functions
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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
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Communication with Flash cards
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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 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
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Supports up to 16 megapixel CMOS imagers
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Interfaces to 16- to 256-Mbit SDRAM, one or two pieces
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15 frames/sec capture mode (VGA resolution)
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Up to 1.5M bytes/sec read/write from/to Flash cards
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2M bytes external Flash ROM for program space
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2M bytes external SRAM for program/working space (optional)
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Full-speed USB interface (mass storage and image class)
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Maximum 80 mA current in normal operation
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1 - 5 mA in standby mode
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50 - 100 µA current in sleep mode
AT76C112
2372AS–DIGICAM–08/02
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© Atmel Corporation 2002.
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2372AS–DIGICAM–08/02
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