CX25822 Datasheet, PDF (1/2 Pages) Conexant Systems, Inc – 960H PCI-Express Media Bridge

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 de-
tect motion on incoming video streams al-
lows 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
Clock,
Data[7:0],
(x10)
CCIR656 Input/Output
CCIR656 Input/Output
CCIR656 Input/Output
CCIR656 Input/Output
CCIR656 Input/Output
CCIR656 Input/Output
CCIR656 Input
CCIR656 Input
CCIR656 Output
CCIR656 Output
DMA Controller
8 Upstream DMA Channels
8 Downstream DMA Channels
SRAM Buffers
48 x GPIO
Motion
Detection
PCI Express
TL/DLL
MAC
x1 PCI Express
PHY Interface
I²S Input/Output
I²S Input/Output
I²S Input/Output
I²S Input
I²S Output
PCI Express Bus
System Monitor
Flags & Alarms
SCL & SDA (x3)
MPU I/F
Applications
‹ 960H PC-based DVRs
Packages
‹ 233-pin, 14x14 mm, fpBGA
‹ 256-pin, 28x28 mm, eLQFP
16 - 24 Bit;
32, 44.1,
48, 96
kHz
(x5)
Part Number CX25822
Description
960H PCI-Express Media Bridge