Cypress AN2131QC Manual do produto - Página 2

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Complete USB Design Made Easy

With the EZ-USB family, the

peripheral designer gains

two overall advantages:

First, the design is much

simpler because of the

chip's significant

integration and built-in

flexibility. Second, the

EZ-USB architecture

reduces software code

significantly over other USB

solutions. This combination

gives users a quick and easy

path toward obtaining a

working prototype.

EZ-USB Series 2100

Typical USB

High-Speed

Peripheral

Implementation

I/O

Flash ROM

Shared

EEPROM

Memory

EPROM

ROM

USB

DMS

Protocol

Controller

(Optional)

Chip

Anchor Chips' EZ-USB family

eliminates the need to become an

expert in USB. It allows the

designer to take advantage of the

benefits of USB without investing

large amounts of time and

energy. With the EZ-USB family,

peripheral designers can have

USB traffic running within

hours, instead of weeks as with

other USB solutions.

The EZ-USB family of controllers

simplifies the process of imple-

menting USB hardware and

software development for

peripheral manufacturers. Low-

level USB protocol requirements

are automatically handled by the

Anchor smart USB core and the

included software utilities.

How does Anchor Chips

make USB easy?

A typical USB

implementation uses

nonvolatile memory

(EPROM, EEPROM, Flash memo-

ry), a microprocessor, RAM, USB

SIE and DMA. The EZ-USB

family includes all the building

blocks for a complete and low-

cost USB solution in a single chip.

The design is much simpler since

timing and interface analysis are

significantly reduced.

Anchor USB

Solution

Micro-

processor

USB

Port

The EZ-USB RAM

architecture provides

design and software

flexibility. Its "soft" configuration

enables peripheral manufacturers

and designers to make changes to

the USB device through software.

This means complete flexibility

with minimal design risks.

The EZ-USB family uses

an intelligent USB core to

simplify 8051 firmware

code by as much as 80%. This

reduces the firmware designer's

need to develop code to handle

the low-level nuances of the USB

specification. The designer is free

to concentrate on higher level

functions. EZ-USB firmware

development is quick, requiring

less binary code and reducing the

likelihood of errors.

With the EZ-USB family's

software utilities and

tools, firmware develop-

ment is simplified and accelerated.

Firmware can be tested indepen-

dent of drivers, allowing the

firmware developer and driver

software developer to write code

simultaneously. They do not need

each other to verify and test code.

This dual path decreases software

development time.