CS1301 datasheet(3/25 Pages) NSC

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Revision 2.2

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1.0

System Architecture

The CS1301/CS1311 multimedia companion acts as a

coprocessor to decode multimedia in National’s Geode

SC1200/SC1201, SC2200, and SC3200 (SCx200 unless

otherwise specified). Figure 1-1 provides a typical system

block diagram.

Media decoding is one of the most demanding system

applications. If media is decoded on the main processor, a

much higher performance processor is required to achieve

even comparable levels of media decoding quality. Such a

system would be significantly over-designed for other

tasks, such as browsing the Internet. Using a low-cost pro-

cessor that is ideally suited for all tasks, and adding the

coprocessor for the high performance media decoding

requirement, results in a cost-effective solution.

Another advantage of an processor/coprocessor solution is

that an OEM (Original Equipment Manufacturer) can pro-

vide a scalable solution. A single board can be designed

that supports the coprocessor. If it is desired to support a

low-end product that does not support the high quality

media decoding capabilities, the coprocessor and its sup-

porting components can be excluded from the system,

which results in additional savings in an already cost-effec-

tive design.

1.1

IMPORTANT DESIGN NOTE

The CS1301/CS1311 was designed to be a general pur-

pose media data processor. As such, the CS1301/CS1311

capable

far

than the current

National

CS1301/CS1311 solution. The solution that National is pro-

viding

only

one

possible implementation of

the

CS1301/CS1311 and only this implementation is fully sup-

ported by National Semiconductor. In order to maintain

software compatibility with National’s provided software,

any deviation of the CS1301/CS1311 section of the sche-

matic is strongly discouraged.

For those wishing to deviate from the schematic, or wishing

take

advantage

other

features

the

CS1301/CS1311, documentation is available on the Philips

Semiconductors SDE CD-ROM to support design varia-

tions. However, additional support to implement these vari-

ations must be obtained from one of the TriMedia Alliance

Partners who support the CS1301/CS1311, its software,

and the peripheral functions.

For a list of TriMedia Alliance Partners, visit:

http://www.trimedia.com/TAPP/

Figure 1-1. System Block Diagram

Sub-ISA

USB 1,2,3

Flash or

M-Systems’

DiskOnChip

Display: TV, CRT, or TFT

SDRAM

PCI Bus

AMP

LM4880

Codec

LM4549

XpressROM

BIOS

IRDA

IDE

CompactFlash

CCIR 656 VIP

WM8725

DAC

GeodeTM

CS1301/

CS1311

GeodeTM

SCx200

SDRAM

EEPROM

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