CX93510 Datasheet, PDF (1/2 Pages) Conexant Systems, Inc – Passive Infrared Camera

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 mixed-
signal 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, low-
power 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.
Key Features
Integrated mixed-signal design for analog-to-
digital image processing
On-chip 256 KB/128 KB frame buffer
Supports JPEG and MJPEG-DPCM image
compression and processes both color and
black and white images
Supports low bandwidth
Low sleep mode power - 10nA
Low operating power -12mA
Integrated analog components (ADCs, LCD
driver)
I2C, SPI, and UART interfaces for flexible
connectivity
Register-driven device
Optional microphone input records audio
session simultaneously during image
captures
Benefits
No external components required for image
conversion
No external RAM required
Provides excellent image processing up to
30 fps
Differential JPEG reduces file sizes by up to
80 percent for faster transfer time
Longer battery life
Energy-efficient design generates less heat
No analog components required
Allows for wide selection of
microprocessors
Simple operation, no CPU
Provides complete A/V solution with flexible
frame buffer for audio and video data
storage
Applications
• Passive Infrared Camera
• Wireless Camera
• IP Network Camera
• Remote Home Monitoring
• Personal Emergency Response
System
• Baby Monitor
• Nanny/Pet Camera
• Smart Meter
• Video Intercom/Monitor
• Security Intercom
Part Number CX93510
Description
JPEG Encoder with aBT.656
Camera Interface and
Optional Microphone Input