1
Features
DSP Functions for CCD/CMOS Image Processing
Video Encoder Including Line Driver for NTSC/PAL TV Signal
Baseline JPEG Compression/Decompression
SDRAM Interface
Support for all Flash Card Interfaces (Atmel DataFlash
, MMC, SD, SSFDC,
CompactFlash)
USB and USART Interfaces for PC Camera Applications
32 Pins for General-purpose I/O
Five External Interrupts, Timer Clock Input and Wakeup Pin
DACs for Camera Control Functions and Audio Output
ADC Channels for Monitoring Camera Analog Inputs, Audio Input and Switch Input,
Like Window Comparator
Serial Interface for Controlling Camera Components
Hardware Up to 2M Bytes Program Space
Support for RTOS
All Low-level Software, Application Samples are Provided
Built-in Outputs Include a CVBS Output with a Line Driver, YC16-bit Digital Output,
RGB 565 Digital Output, Digital Composite Output
Compatible with Various Types of Display Devices
SDRAM Support from 16M Bits to 256M Bits
Direct Interface to Epson LCDs
280-pin FlexBGA Package
1.8-volt Core and 3.3V I/O Operation
Figure 1. Typical DSC Application Using AT76C111
SDRAM
SDRAM I/F
GPIO
CCD
I/F
CCD
CDS
A/D
Serial
Camera
I/F
RS232
Port
(PC)
USART
USB (PC)
USB
DAC
with
L.D.
TV
DACs
ADC
Digital Inputs
Control
Push Buttons
Iris Control
Shutter Motor
Lens Motor
Flash Bulb Control
AGC Gain
Voice Output
Battery-level Check
Photo Detection (AE)
Focus Sensor
Voice Input
MMC/SPI/SD
SSFDC
DataFlash
External
Memory I/F
Flash
Flash
SRAM
CF
Flash
Card
I/F
High-
Performance
Digital Camera
Processor
AT76C111
Summary
Rev. 2334ASIMAGE08/02
Note: This is a summary document. A complete document is
available under NDA. For more information, please contact your
local Atmel sales office.
2
AT76C111
2334ASIMAGE08/02
Description
The AT76C111 is a highly-integrated solution for digital cameras. It combines a number
of functions that are required in digital cameras.
Image data acquisition and capturing from either CCD or CMOS imagers
Image display
Image processing and image storing
Overall camera 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 camera manufacturers to directly
access a variety of devices that may be present in a digital camera.
Communication with PCs
Communication with Flash cards
Serial communication ports for controlling other devices in the camera
The design is based on an ARM
microprocessor that controls the entire chip. A number
of hardware resources, controlled by ARM, perform digital camera functions such as
image DSP processing, JPEG coding/decoding, DMA access to SDRAM and Video
encoding. 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 CCDs/CMOS (10 - 30 MHz CCDs)
CCD colors are limited to the Bayer arrangements of the RGB primary colors
Interfaces to 16 - 256-Mbit SDRAM, one or two pieces
30 frames/sec Video Display mode (NTSC)
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)
60 - 100 mA current
1 - 5 mA in Standby mode
50 A current in Sleep mode
Printed on recycled paper.
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.
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2334ASIMAGE08/02
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