Video Surveillance Video Surveillance/Security Applications CX93510 JPEG Encoder with a BT.656 Camera Interface and Optional Microphone Input Low-cost and low-power solution for wireless and battery-operated cameras Conexant’s CX93510 is a monolithic mixedsignal Application Specific Standard Product (ASSP) specifically designed for motion sensors with visual verification. The encoder is controlled through a simple register set via the microprocessor interface. The variety of available interfaces, such as Serial Peripheral Interface (SPI), UART and I2C, allow for wide flexibility in microprocessor selection. Combined with an external CMOS sensor, the CX93510 retrieves and stores compressed JPEG and audio data in an on-chip 256 KB/128 KB frame buffer so no external memory is required. The ASSP enables low-cost, lowpower Passive Infrared (PIR) surveillance camera applications with visual and audio verification. Upon a motion event, the host processor wakes and configures the CX93510 and begins image/audio captures within 100 ms of motion being detected. The chip has both digital and analog photocell sensor inputs available to facilitate the measurement of ambient light and uses an on-chip LED driver to control an external infrared LED during low-light conditions. The CX93510 supports JPEG and MJPEG-DPCM image compression. An optional 2:1 scaler provides Quarter Video Graphics Array (QVGA) images from the VGA input. The device processes both color and black and white images up to 30 fps. With the elective microphone input, the CX93510 records a 2- or 4-bit Adaptive Differential Pulse Code Modulation (ADPCM) audio session simultaneously during image captures. The frame buffer can be optionally configured to contain a 4 KB contiguous memory area for audio data storage. When not enabled, this 4 KB block reverts to video memory use. The stored images and audio data are then passed on to an external microprocessor. The CX93510 allows for flexible power management options with its internal voltage regulators and I/O connection options. To conserve power, it can remain in a very deep sleep during idle periods until awakened by the host processor. For systems that are battery powered, the CX93510 can operate between 3.6 V and 1.8 V. A battery measurement input allows the host to monitor the battery level and alert the user if battery replacement is needed. The CX93510 is a flexible, cost-effective, and low-power ASSP ideally suited for security applications requiring visual verification. Applications • Passive Infrared Camera • Wireless Camera Key Features Benefits Integrated mixed-signal design for analog-todigital image processing No external components required for image conversion On-chip 256 KB/128 KB frame buffer No external RAM required Supports JPEG and MJPEG-DPCM image compression and processes both color and black and white images Provides excellent image processing up to 30 fps Supports low bandwidth Differential JPEG reduces file sizes by up to 80 percent for faster transfer time Low sleep mode power - 10nA Longer battery life • Video Intercom/Monitor Low operating power -12mA Energy-efficient design generates less heat • Security Intercom Integrated analog components (ADCs, LCD driver) No analog components required I2C, SPI, and UART interfaces for flexible connectivity Allows for wide selection of microprocessors Register-driven device Simple operation, no CPU Optional microphone input records audio session simultaneously during image captures Provides complete A/V solution with flexible frame buffer for audio and video data storage • IP Network Camera • Remote Home Monitoring • Personal Emergency Response System • Baby Monitor • Nanny/Pet Camera • Smart Meter Part Number CX93510 Description JPEG Encoder with aBT.656 Camera Interface and Optional Microphone Input Video Surveillance Video Surveillance/Security Applications CX93510 Features – A/D for Photocell sensor, battery voltage monitor, and micro-phone inputs – Sleep mode - ASSP off except frame buffer in retention mode – 12mA in operational mode – 10nA in sleep mode Interfaces • Sensor I/F – 8-b 4:2:2 YCrCb with BT.656 embedded timing codes or frame/line sync support up to 27 MHz, progressive mode – Resolutions: VGA (640x480) and QVGA (320x240) – 27 MHz clk output – 2/3 wire control I/F: I2C master port or SCCB Supported Applications and operating Modes • PIR Sensor with Video – Visual verification of intruder via image sensor interface – VGA - Black and white or color at up to 30 fps – VGA to QVGA Filtered ½ res Scaling – JPEG & MJPEG-DPCM image compression (ISO/IEC 10918-1/2) – Continuous streaming and variable image modes – 256 KB or 128 KB frame buffer for compressed images (no external memory) – Interface to external μP though SPI, UART, or I2C – Variable IR illumination control port CMOS Sensor SoC Scaler BT.656 JPEG Frame Buffer 128 KB/ 256 KB I2C Master SCCB – 4-wire I2C/SPI/UART slave port to ext µP – 8 GPIO (5 dedicated pins, 3 shared pins) – IR illumination with variable DAC and PWM control – Microphone input, mic boost 0-36 dB in 6 dB steps, 2- and 4- bit ADPCM – DC measurement battery monitor – Photocell sensor input - analog or I2C (shared with GPIO) – Support for battery operation: 3.6 V to 1.8 V 48-pin eMLF/QFN • 6 mm x 6 mm lead-less package • 0 to +70 oC ambient, 0 to +100 oC junction I2Cs SPI UART Host Processor Motion Sensor Power Down Memory Retention 27 MHz Crystal/Clock Xtal CLK Microphone MIC IN Power Down Photo Sensor ADC LED Out IR LEDs I2C Master Digital Photocell G P IO s Sensor Host/Status CX93510 Registers VB A T Optional DC/DC Conversion LDOx2 Sensor Host I/O (VRR & VDD) I/O VB A T_IO VB A T_DIG 1V LDO (AVDD) VB A T_ANA VB A T CX93510 Functional Block Diagram Conexant Product Portfolio Conexant’s comprehensive product portfolio includes solutions for imaging, audio, video surveillance, and embedded modem applications. © 2009 Conexant Systems, Inc. All Rights Reserved. Conexant and the Conexant logo are registered trademarks of Conexant Systems, Inc. All other trademarks are owned by their respective owners. Although Conexant strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. This material is provided AS IS and without any express or implied warranties, including merchantability, fitness for a particular purpose and non-infringement. Conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. 09-2857 www.conexant.com General Information: U.S. and Canada: (888) 855-4562 International: 1+ (949) 483-3000 Headquarters 4000 MacArthur Blvd. Newport Beach, CA 92660 Doc# PBR-202204