at76c114 ATMEL Corporation, at76c114 Datasheet - Page 4

• Manufacturer Part Number: at76c114
• Description: Highperformance Digital/video Camera Processor At76c114 Summary
• Manufacturer: ATMEL Corporation

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AT76C114
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digital cameras and mobile phones. All performance figures are for half-duplex
operation. Full duplex is possible, but the performance has not been characterized.
The device utilizes a unified memory architecture using the DDR-SDRAM to
capture, process, and play back images and video as well as to store program code
and variables. It supports SDRAM configurations of up to 1 gigabit.
The device supports all Flash cards, including Multimedia Card (MMC), Secure
Digital (SD), Memory Stick Pro, SSFDC/Smartmedia/NAND Flash, and
CompactFlash. The Flash card interfaces can support read/write operations at the
maximum speeds specified by the Flash cards.
The device has an ATA/IDE controller with UDMA capability to stream video directly
to hard drives or CompactFlash devices.
A static memory controller is included that supports up to eight 16 MB devices such
as Flash, SRAM, or other memory-mapped peripherals. Both 8-bit and16-bit data
buses are supported, with data accesses of up to 32 bits. The number of wait states,
and setup, hold, and data float times are programmable on a per device (chip select)
basis.
A general-purpose 10-bit, 96 kHz DAC is available. It can be used to control camera
components such as the iris, shutter motor, lens motor, flash bulb, or AGC gain. It
can also be used to drive audio output.
A general-purpose 10-bit, 96 kHz ADC is available. This ADC has four input
channels, which can be used for such things as battery level checking, photo
detection, focus sensing, or audio capture.
The I
with an external stereo ADC/DAC to capture or play back voice or audio. The device
can encode captured audio in various popular formats, and can package it in the
same bitstream as the video or inside compressed JPEG pictures. It can also play
back stand-alone audio such as MP3 files, or audio embedded in MPEG bitstreams.
The USB 2.0 high-speed slave controller can be used to connect to a PC for efficient
downloading of captured images to the PC. The USB 2.0 full-speed host controller
allows the device to connect directly to printers and other slave devices.
An IEEE 1394 link layer interface allows the device to stream video (compressed or
uncompressed) to other devices.
Two USART interfaces are included for serial communication. They support
standard baud rates of up to 460.8 kbps or non-standard rates of up to 4.875 Mbps
in asynchronous mode. They support rates of up to19.5 Mbps in synchronous
mode.
The Serial Peripheral Interface (SPI) is used to boot from an external EEPROM.
Once the boot code is loaded inside the program memory, the CPU can download
its code from any peripheral supported by the device, including non-volatile storage
media. With four chip select pins, the SPI can also be used to control other external
devices at speeds of up to 24 Mbps.
Three 16-bit and three 32-bit general purpose timers are included which can be
used to generate interrupts to the internal CPU. The 16-bit timers can also generate
waveforms on their associated pins via pulse-width modulation (PWM) or other
techniques. They can also monitor and count external events on these pins.
A dedicated watchdog timer is available which can provide an interrupt, an event on
an external pin, or a reset to the internal CPU in the event that software is not
responding as expected. Write access to the watchdog is protected by control
access keys to prevent corruption of the watchdog should an error condition occur.
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S- and AC ’97-compatible audio data interface allows the device to connect
5674BS–IMAGE–09/04