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PBR-CX25822-0020 pages
Video
Video Surveillance/Security Applications
CX25822
960H PCI-Express Media Bridge
Multi-Channel Video and Audio to
PCIe Bridge
The CX25822 multi-channel media bridge
device enables bi-directional digital video
and audio transfers to a host PC via a
PCIe x1 interface. The CX25822 contains
BT.656/VIP2.0 digital video interfaces
supporting up to 36 MHz input clock rates
and I2S digital audio interfaces supporting
up to 96 kHz sample rates, for
uncompressed video and audio data
respectively. The CX25822 device is
designed for PC-based security Digital
Video Recorders (DVRs) supporting
960H applications.
Flexible Architecture
With ten bi-directional video interfaces
(maximum of eight in either direction)
and five bi-directional audio interfaces
(maximum of four in either direction), the
CX25822 can bridge multiple streams of
BT.656/VIP2.0 video and I2S audio to/
from the PCIe bus.
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 CX25822 contain 48 GPIO pins,
which maximize flexibility and allow
customization to a variety of applications
and designs. The GPIO pins also support
I2C interfaces, interrupts, flags for motion
detection, and other features.
Surveillance-Specific Features
The CX25822 contains programmable
logic to detect motion on incoming
BT.656/VIP2.0 streams. The ability to detect motion on incoming video streams allows the CX25822 to immediately alert the
host processor of motion via interrupts
over PCIe.
Distinguishing Features
PCIe 1.1 Compliant
Bi-directional BT.656 interfaces to
PCIe
Bi-directional I2S interfaces to PCIe
Programmable Motion Detection
Supports “54 MHz Mode” digital video
data (2 channel byte-interleaved
mode)
48 GPIO pins
Applications
960H PC-based DVRs
CCIR656 Input/Output
CCIR656 Input/Output
CCIR656 Input/Output
System Monitor
Flags & Alarms
DMA Controller
8 Upstream DMA Channels
8 Downstream DMA Channels
SRAM Buffers
CCIR656 Input/Output
Clock,
Data[7:0],
(x10)
MPU I/F
Packages
233-pin, 14x14 mm, fpBGA
256-pin, 28x28 mm, eLQFP
I 2 S Input/Output
Motion
Detection
PCI Express
TL/DLL
MAC
CCIR656 Input
I 2 S Input/Output
16 - 24 Bit;
32, 44.1,
48, 96
kHz
(x5)
I 2 S Input
CCIR656 Input
CCIR656 Output
SCL & SDA (x3)
I 2 S Input/Output
CCIR656 Input/Output
CCIR656 Input/Output
48 x GPIO
I 2 S Output
x1 PCI Express
PHY Interface
CCIR656 Output
Part Number CX25822
PCI Express Bus
Description
960H PCI-Express Media Bridge
