3.0 PC Board Considerations
CX25870/871
3.6 Applications Information
Flicker-Free Video Encoder with Ultrascale Technology
3.6.3 System Block Diagrams
The CX25870/871 can be designed into any system that requires analog standard
definition television outputs (NTSC/PAL/SECAM/SCART) or high definition
television outputs (YPBPR/HD RGB) based on a digital RGB or YCrCb set of
inputs.
The following system block diagrams are meant to illustrate several common
applications which presently utilize the CX25870/871 encoder.
Figure 3-14. System Block Diagram for Desktop/Portable PC with TV Out
Intel Pentium III™
or AMD K7™
Series CPU
CPU CLK
AGP
Bus
Analog RGB
AGP
Graphics
Controller
Control
Address
Data
Memory
Bus
VGA Monitor
DIMM*2
North Bridge
Core Logic
CLKs
Digital RGB
CX25871
or YCrCB
Pixels
or
Bt869
Core Logic
CLK #1
Clock
Generator
NTSC/PAL/SECAM
Television or HDTV
Conexant VGA Encoder
PCI Bus
Core Logic CLK #2
SMBus
Parallel Port
Serial Port
IDE
IEEE 1394
Host
Controller
PCI/Legacy
Audio
Controller
PCI CardBus
PC Controller
PCI Riser
Device
South Bridge
Core Logic
FDD i-f
AC '97
USB Ports
ATA 33/066
GPIO
PCMCIA
Socket
BIOS
Flash ROM
CODEC
ACPI
Lin IN
Lin OUT
Mic IN
100381_099
3-26
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
