Cypress 2100 ユーザーズマニュアル

High-Speed

Peripheral

Shared

Memory

Flash ROM

EEPROM

EPROM

ROM

Micro-

processor

DMS

Controller
(Optional)

USB

Protocol

Controller

Chip

USB

Port

I/O

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.

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.

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.

4

3

2

1

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.