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

• 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.

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

AT76C111

2334AS–IMAGE–08/0 2

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