Rainbow-electronics DS4520 Manuel d'utilisateur télécharger pdf

General Description

The DS4520 is a 9-bit nonvolatile (NV) I/O expander with

64 bytes of NV user memory controlled by an I

compatible serial interface. The DS4520 offers users a

digitally programmable alternative to hardware jumpers

and mechanical switches that are being used to control

digital logic nodes. Furthermore, the digital state of each

pin can be read through the serial interface. Each I/O

pin is independently configurable. The outputs are open

drain with selectable pullups. Each output has the ability

to sink up to 12mA. Since the device is NV, it powers up

in the desired state allowing it to control digital logic

inputs immediately on power-up without having to wait

for the host CPU to initiate control.

Applications

RAM-Based FPGA Bank Switching for

Multiple Profiles

Selecting Between Boot Flash

Setting ASIC Configurations/Profiles

Servers

Network Storage

Routers

Telecom Equipment

PC Peripherals

Features

♦ Programmable Replacement for Mechanical

Jumpers and Switches

♦ Nine NV Input/Output Pins

♦ 64-Byte NV User Memory (EEPROM)

♦ I

C-Compatible Serial Interface

♦ Up to 8 Devices Can be Multidropped on the

Same I

C Bus

♦ Open-Drain Outputs with Configurable Pullups

♦ Outputs Capable of Sinking 12mA

♦ Low Power Consumption

♦ Wide Operating Voltage (2.7V to 5.5V)

♦ Operating Temperature Range: -40°C to +85°C

DS4520

9-Bit I

C Nonvolatile

I/O Expander Plus Memory

______________________________________________ Maxim Integrated Products 1

I/O_0

GND

I/O_8

I/O_7

I/O_6

I/O_5

SCL

SDA

TOP VIEW

I/O_1

I/O_2

I/O_3

I/O_4

DS4520

Pin Configuration

SCL

I/O_0

I/O_1

I/O_2

I/O_3

I/O_4

I/O_5

I/O_6

I/O_7

I/O_8

SDA

GND

FROM

SYSTEM

CONTROLLER

FPGA

CLOCK

GENERATOR

CPU

SPEED

SELECT

4.7kΩ

0.1µF

DS4520

Typical Operating Circuit

Rev 0; 6/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Add “/T&R” for tape and reel orders.

Ordering Information

C is a trademark of Philips Corp. Purchase of I

C components from Maxim Integrated Products, Inc., or one of its sublicensed

Associated Companies, conveys a license under the Philips I

C Patent Rights to use these components in an I

C system, provided

that the system conforms to the I

C Standard Specification as defined by Philips.

PART TEMP RANGE PIN-PACKAGE

DS4520E -40°C to +85°C 16 TSSOP

1 2 3 4 5 6 7 8 9 10

Résumé du contenu

Page 1 - I/O Expander Plus Memory

General DescriptionThe DS4520 is a 9-bit nonvolatile (NV) I/O expander with64 bytes of NV user memory controlled by an I2CTM-compatible serial interfa

Page 2

DS45209-Bit I2C NonvolatileI/O Expander Plus MemoryMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied

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DS45209-Bit I2C NonvolatileI/O Expander Plus Memory2 _____________________________________________________________________ABSOLUTE MAXIMUM RATINGSRECO

Page 4

DS45209-Bit I2C NonvolatileI/O Expander Plus Memory_____________________________________________________________________ 3Note 1: All voltages referen

Page 5

DS45209-Bit I2C NonvolatileI/O Expander Plus Memory4 _____________________________________________________________________Typical Operating Characteri

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DS45209-Bit I2C NonvolatileI/O Expander Plus Memory_____________________________________________________________________ 5Pin DescriptionPINNAMEFUNCTI

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DS45209-Bit I2C NonvolatileI/O Expander Plus Memory6 _____________________________________________________________________Detailed DescriptionThe DS45

Page 8

DS45209-Bit I2C NonvolatileI/O Expander Plus Memory_____________________________________________________________________ 7*THE SLAVE ADDRESS IS DETERM

Page 9

DS45209-Bit I2C NonvolatileI/O Expander Plus Memory8 _____________________________________________________________________Bit Read: At the end a write

Page 10

If an incorrect slave address is written, the DS4520assumes the master is communicating with another I2Cdevice and ignores the communication until the

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Rainbow-electronics DS4520 Manuel d'utilisateur

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