ccir656 input/output 48 x gpio motion detection x1 pci express phy interface clock, data[7:0], (x10) dma controller 8 upstream dma channels 8 downstream dma channels sram buffers ccir656 input/output ccir656 input/output ccir656 input/output ccir656 input/output ccir656 input/output ccir656 input ccir656 input ccir656 output ccir656 output i 2 s input/output pci express tl/dll mac i 2 s input/output i 2 s input/output i 2 s input i 2 s output pci express bus system monitor flags & alarms scl & sda (x3) mpu i/f 16 - 24 bit; 32, 44.1, 48, 96 khz (x5) multi-channel video and audio to pcie bridge the CX25820/1 multi-channel media bridge devices enable bi-directional digital video and audio transfers to a host pc via a pcie x1 interface. the CX25820 and cx25821 contain bt.656/vip2.0 digital video interfaces supporting 27 mhz input clock rates and i 2 s digital audio interfaces supporting up to 96 khz sample rates, for uncompressed video and audio data respectively. both devices are designed for pc-based security digital video recorders (dvrs) supporting pal and ntsc applications. flexible architecture with six bi-directional video interfaces and three bi-directional audio interfaces, the CX25820 can bridge multiple streams of bt.656/vip2.0 video and i 2 s audio to/ from the pcie bus. the cx25821 adds four more video interfaces, for a total of ten digital video interfaces (maximum of eight in either direction). the cx25821 also adds two audio interfaces, increasing the total number of i 2 s interfaces to five (maximum of four in either direction).the video interfaces may be configured to accept video data in a ?54 mhz mode?, which reduces the number of traces routed on the pcb by interleaving 2 data streams on a single digital video port. the CX25820/1 contain 48 gpio pins, which maximize flexibility and allow customization to a variety of applications and designs. the gpio pins also support i 2 c interfaces, interrupts, flags for motion detection, and other features. surveillance-specific features the CX25820/1 contains programmable logic to detect motion on incoming bt.656/vip2.0 streams. the ability to de- tect motion on incoming video streams al- lows the CX25820/1 to immediately alert the host processor of motion via interrupts over pcie. CX25820/1 pci-express media bridge distinguishing features ? pcie 1.1 compliant ? bi-directional bt.656 interfaces to pcie ? bi-directional i 2 s interfaces to pcie ? programmable motion detection ? supports ?54 mhz mode? digital video data (2 channel byte-interleaved mode) ? 48 gpio pins applications ? pal and ntsc pc-based dvrs ? multi-m onitor displays packages ? 233-pin, 14 x 14 mm, fpbga ? 256-pin, 28 x 28 mm, elqfp part number CX25820, cx25821 description pci-express media bridge video video surveillance/security applications
distributor/representative information the CX25820/1 can downscale digital video from 4:2:2 format to 4:1:1, reducing the bandwidth from 16 to 12 bits per pixel and permitting additional uncompressed streams to be sent over the pcie bus. when properly configured, the cx25821 and any one of conexant's family of multi-channel video decoders form a high-quality, two-chip pc-dvr solution capable of capturing and bridging up to 8 channels of real-time full d1. 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-201499 ? 2011 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 merchant ability, 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. vid_a i 2 s_record i 2 s_playback vid_b vid_c vid_d 8 (video) 8 (audio) cx25828 cx25821 port a port c port e port g i 2 s in i 2 s out pcie x1 8- channel dvr application cx25821 pcie x1 cx25874 cx25874 cx25874 cx25874 cx25874 cx25874 cx25874 cx25874 multi-monitor display application
|
