AT76C111 ATMEL

Document overview

  • Manufacturer or author: Provided By digicamel.com
  • PDF pages: 3

Technical content

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

  • 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. 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.

2 AT76C111

2334AS–IMAGE–08/02 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 µA current in Sleep mode

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