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RS8235KHFD

Endstation ServiceSAR Controller

Conexant Systems 

Figure 1. RS8235 functional block diagram

Virtual Path Networking

The RS8235 can interleave segmentation of numerous

VCCs (i.e., separate VC channels) as members of one VP.

VP-based traffic shaping is supported.The entire VP is

scheduled according to one set of traffic parameters.

CBR Tunneling

The user can designate up to four CBR pipes (or tunnels)

in which to transmit multiple CBR channels. This

allows proprietary traffic management schemes to

operate under a pre-allocated CBR bandwidth.

RS8235/8251EVM ATM Evaluation Module

The RS8235 ATM Evaluation Module (EVM) provides

complete evaluation capability for the RS8235

segmentation and reassembly controller. The

EVM serves as a hardware and software reference

design for development of customer-specific ATM

applications. The RS8235/8251EVM was designed to

provide a rapid prototyping environment to assist

and speed customer development of new ATM

products, thereby reducing product time to market.

The PCI interface between the host processor and

the local system is controlled by the RS8235 Hardware

Programming Interface (RS8235HPI), a software driver

for the RS8235, on top of which a system designer can

develop and place proprietary driver software. This

interface allows users to easily port their applications

to the RS8235/8251EVM. This software is written in

C, and source code is available under a no-cost

license agreement.

The RS8235/8251EVM also includes documentation,

a full set of design schematics and artwork for the

RS8235/8251EVM PCI card.

RS8235/8251EVM (Standard PCI Card Size)

Figure 2 shows a block diagram of the hardware for

the RS8235/8251EVM. The software is described on the

following page.

The RS8235/8251EVM PCI card is specifically

designed to be a full-featured ATM controller based

on Conexant’s RS8251 ATM receiver/transmitter and

the RS8235 Endstation SAR. The PHY interface comes

configured with an optical OC-3 connection for testing

at 155 Mbps.

PCI Bus

Figure 2. RS8235/8251EVM hardware block diagram

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