monitoring and management applications such as

Vitesse VSC055/050 Backplane Controllers.

The VSC205 requires off chip memory for firmware

code storage.

Most applications will use flash

memory devices for non-volatile storage.

Static

RAM

may

be

added

for

higher

performance

applications. The VSC205 has three external chip

selects each with a one-megabyte address range.

Two RS-232 serial ports provide assist firmware

debug. One port is dedicated to in circuit emulation

for the embedded processor.

The second port

implements a XMODEM connection for additional

debug

and

firmware

download.

Firmware

downloads are also supported via the SCSI bus.

Software

The software designed to execute on the VSC205

determines

the

characteristics

of

the

overall

enclosure management solution.

Most enclosure

management applications will be unique to a

customer's

individual

product.

The

VSC205

firmware architecture uses a Personality Module with

captures the unique functionality required by a

particular application. Vitesse provides a Software

Development Kit (SDK) to customers to assist their

development of their Personality Module.

The SDK includes software to implement an ESI and

a parallel SCSI transport for SAF-TE or SES

diagnostic environments. In addition, the SDK also

includes a System Services module with provides

APIs to the peripheral functionality (interrupts, timers

etc.) in the VSC205.

The

VSC205

shares

a

similar

hardware

and

firmware

architecture

as

Vitesse

SSC200

and

SSC100. This allows system designers to leverage

enclosure

management

strategies

and

implementations across parallel SCSI, ESI and

dedicated port FC-AL storage solutions.

For More Information:

www.vitesse.com

email: prodinfo@vitesse.com

TEL: 1-800-VITESSE

FAX: 805/987-5896

Vitesse Semiconductor Corporation reserves the right to make

changes in its products, specifications or other information at any

time without prior notice. Therefore the reader is cautioned to

confirm that this datasheet is current prior to placing any orders.

The

company

assumes

no

responsibility

for

any

circuitry

described other than circuitry entirely embodied in a Vitesse

product.

(Version 1.0)

© 2000 Vitesse Semiconductor Corporation, All Rights Reserved.

Transport

Diagnostic Interface

Personality Module

System Services

SDK Firmware Block Diagram

GPIO

(x3)

Serial I/F

(x3)

UART

Serial

ICE

External

Memory

I/F

Timer

INT

Cont.

Wide SCSI

Controller

2048 Byte

Data

Buffer

32 Byte

Command

Buffer

R3000 CPU

Bus

I/F

Unit

8KB SRAM

LVD

SCSI

Interface

8KB SRAM

VSC205 Block Diagram