ATMEL AT76C111 User Manual
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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
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
®
, MMC, SD, SSFDC,
HighPerformance
Digital Camera
Processor
AT76C111
Figure 1. Typical DSC Application Using AT76C111
• Digital Inputs
• Control
• Push Buttons
GPIO
Flash
Card
I/F
• MMC/SPI/SD
• SSFDC
• DataFlash
CCD
CDS
A/D
RS232
Por t
(PC)
USB (PC)
CCD
I/F
Serial
Camera
I/F
USART
USB
SDRAM
SDRAM I/F
External
Memory I/F
Flash
• Flash
• SRAM
• CF
DAC
with
L.D.
DACs
ADC
Summary
TV
• Iris Control
• Shutter Motor
• Lens Motor
• Flash Bulb Control
• AGC Gain
• Voice Output
• Battery-level Check
• Photo Detection (AE)
• Focus Sensor
• Voice Input
Rev. 2334AS–IMAGE–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 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
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.
microprocessor that controls the entire chip. A number
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 µA current in Sleep mode
2
AT76C111
2334AS–IMAGE–08/0 2
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