Linear Technology DC2294A Linduino Shield Manual de usuario

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DEMO MANUAL DC2294A

DESCRIPTION

Power System Management

Linduino One Shield

TheDC2294ALinduino™Shieldisanadapterboardenabling

use of Linduino PSM (Power System Management) soft-

warewithofftheshelfLinearTechnologyPSMdemonstra-

tionboards. For acompletelist ofcompatibledemo boards,

click this link: http://www.linear.com/search/search.

php?q=dc&col=doc-dm&start=&sort=&order=&ci=1800.

LinduinoPSMsoftwareisasetof librariesmeant tofacilitate

learningand softwaredevelopment forPMBusdevices. The

portability and flexibility of the Linduino platform makes

it ideal for demonstrating a wide variety of applications.

Linduino is an Arduino compatible board with an isolated

I2C interface and a ribbon connector that supports com-

munication with many LT C

demonstration circuit boards.

The DC2294A Linduino Shield extends this capability to

the PSM demonstration circuits. For more information

on Linduino, see:

http://www.linear.com/solutions/linduino

PROGRAMMING: REQUIRED HARDWARE

Varies based on application, but in general:

n Arduino Software Supported PC with USB

n Linduino One (DC2026A)

n USB cable

PROGRAMMING: REQUIRED SOFTWARE

n Arduino IDE

n LTC Linduino Sketchbook (http://www.linear.com/so-

lutions/Linduino) – See the QuickStart Tab

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

Linduino is a trademark of Linear Technology Corporation. All other trademarks are the property

of their respective owners.

DEMONSTRATION: REQUIRED HARDWARE

Varies based on application, but in general:

n DC2026 Linduino One

n DC2294A Linduino Shield

n Target Demo Board (DC1962, etc.)

DEMONSTRATION: NICE TO HAVE

n Total Phase Beagle I2C Protocol Analyzer

n Total Phase Data Center Software

For this getting started manual, we will use the DC1962.

The DC1962 demo board has 14 power supply rails:

2XLTC3880, 4X LTC2974 and 8X LTC2977.

SHIELD FEATURES

n 12 Pin PSM Ribbon Cable Connector

n 10 Pin Total Phase Beagle Connector

n LTC4313 Bus Buffer

n Observe PMBus and SPI with a Beagle

LINDUINO PSM FEATURES

n A Library of Common PMBus Commands that Sup-

ports the Most Recent PMBus Features, Including

Group Protocol and Page Plus

n Demonstration Sketches for the Linduino

Design files for this circuit board are available at

http://www.linear.com/demo/DC2294A

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DEMO MANUAL DC2294A

FIRST STEPS

Figure 1. DC1962 (top), DC2026/DC2294A (middle) and Beagle (bottom). DC1962 and Beagle not included with DC2294A.

The DC1962 sketches are the starting point for becoming

familiar with the PMBus library.

1. Make sure the Arduino preferences point to the cor-

rect Sketchbook as described in the Linduino Demo

Manual. http://www.linear.com/solutions/linduino.

2. Be sure to complete the setup described on pages4/5

of the Linduino Demo Manual to verify the proper

setup and operation of the serial port and the monitor

before proceeding.

3. Place the DC2294A Linduino Shield on the DC2026

Linduino.Allthe pins should go intothecorresponding

sockets. Refer to Figure 1 for the correct orientation.

4. Connect the PC to the DC2026 using the supplied USB

cable.

5. Plug one end of the 12-pin ribbon cable into the cor-

responding 12-pin connector (J2) of the DC1962.

Plug the other end into the 12-pin connector of the

DC2294A Linduino Shield.

6. In the Arduino IDE File menu, select: Sketchbook |User

Contributed | DC1962 | hello_world.

7. Select the Serial port: Tools | Serial Port | COM#.

8. Select the board: Tools | Board | Arduino Uno.

9. In the Arduino IDE File menu, upload the sketch to the

Linduino: File | Upload.

10. Open the Serial Monitor to begin the demo: Tools|Se-

rial Monitor.

11. Set the baud rate to 115200 at the bottom right of the

window.

12. Set the termination to Carriage Return to the left of

the baud rate.

13. If you have a Total Phase Beagle sniffing tool, attach

it and observe the I2C/PMBus traffic produced by

thisdemo.

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DEMO MANUAL DC2294A

HELLO_WORLD SKETCH

The hello_world sketch demonstrates how to perform

basic PMBus commands. Upload the sketch and then

open the Serial Monitor (Refer to Page 2, Steps 6 and 7).

Themain menu(Figure2) demonstratesenabling/disabling

Packet Error Checking (PEC) communication, bus prob-

ing, and resetting the device. The Basic Commands menu

(Figure3)demonstratesreading telemetrydata (Figure4),

altering voltage outputs, sequencing, and margining.

To operate the menu, enter a number on the command

line at the top of the window and press return. Stretching

the window vertically to see the results will help.

The hello_world sketch can be used as a template for new

sketches. Any standard PSM demo board may be used.

VIEWING PMBUS WITH THE BEAGLE

To observe PMBus traffic on the I2C bus, connect a Beagle

tothe DC2294Aas shownin Figure1and followthese steps:

1. Download the latest TotalPhase Data Center Software

and USB drivers from http://www.totalphase.com/

downloads/ and install them using the instructions

supplied by Total Phase. If you do not want to create

a Total Phase login and account, you can use an older

version of Data Center and USB driver.

2. Connect the PC to the Beagle with the supplied

USBcable.

DEMO SKETCH – DC1962 (POWERSTICK)

3. Start Data Center, Connect Data Center to the Beagle

using the toolbar and start data collection with the

toolbar (refer to Beagle documentation).

4. Load the hello_world sketch and press 1 to get the

secondary menu, followed by a 1 to measure voltage

telemetry.

5. Look at the results in the Data Center menu.

6. Compare the PMBus traffic displayed in Data Center

with the code in the hello_world sketch and correlate

the observed behavior with the PMBus commands in

the code.

SUMMARY

TheDC2026 Linduino,and DC2294ALinduinoShield,when

combinedwith aDC1962demo boardisan excellent wayto

learnPMBusand prototype firmware in asafeenvironment

where nothing can be damaged. The PMBus library may

be ported into a commercial platform, or in some cases it

can be reused “as is” using the same ATmega processor

found on the Linduino. The software is fully compatible

with Arduino One and Arduino Mega 2560. The software

has also been used on a Galileo Gen 2 (see factory).

Linear Technology also has drivers for Linux (usermode)

and various RTOS application examples (see factory).

Have fun prototyping and if you need help, just call your

local Linear Technology Field Application Engineer. If

you make something cool and want to contribute to the

Linduino Sketchbook, also give us a call.

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DEMO MANUAL DC2294A

Figure 3. Basic Commands

Figure 2. Main Menu

DEMO SKETCH – DC1962C(POWERSTICK)

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DEMO MANUAL DC2294A

Figure 4. Read All Voltages

DEMO SKETCH – DC1962C(POWERSTICK)

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DEMO MANUAL DC2294A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 1 C35 CAP CER, 0.1μF 16V 5% X7R 0603 MURATA, GRM188R71C104JA01D

2 4 R62, R63, R64, R65 RES 20kΩ 1/10W 1% 0603 SMD PANASONIC, ERJ-3EKF2002V

3 1 JP1 CONN HEADER LOW-PRO 10POS GOLD ASSMANN WSW COMPONENTS, AWHW-10G-0202-T

4 1 J2 CONN HEADER 12POS 2mm STR DL PCB FCI, 98414-G06-12ULF 4 TBS

5 1 U29 2-WIRE BUS BUFFERS WITH HIGH NOISE MARGIN LINEAR, LTC4313IMS8-2#PBF

6 1 JP2 HEADER CONN 28POS 0.100" STR TIN MOLEX, 90131-0134

7 1 J1-A HEADER CONN 6POS 0.100" STR TIN 782-A000084

8 2 J1-B HEADER CONN 8POS 0.100" STR TIN 782-A000085

9 1 J1-C HEADER CONN 10POS 0.100" STR TIN 782-A000086

10 1 J1-D HEADER CONN 6POS(2X3) 0.100" STR TIN CON3DIL25

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DEMO MANUAL DC2294A

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

SCHEMATIC DIAGRAM

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DEMO MANUAL DC2294A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

 LINEAR TECHNOLOGY CORPORATION 2015

LT 0115 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT

OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete

in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety

measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date

of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU

OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR

ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims

arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all

appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application

engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Mouser Electronics

Authorized Distributor

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