Atmel AVR943 User manual

Atmel AVR943: ATAVRBM300 User Guide

Features

• USB to serial interface converter

- USB1.1 device

• Converts USB to

- SMBus/TWI

- SPI

- UART

- Single-wire UART

• USB supply power for Atmel®BM300

• USB gateway to PC/Atmel AVR®Battery Studio 2

• LED status indication

• Supports the Atmel ATBMxxx-EK evaluation kits

1 Introduction

The Atmel ATAVRBM300 is a USB based communication tool that can be used to

communicate with Smart Battery systems by a PC. It supports four popular

interfaces used in Smart Battery system: SMBus/TWI, single-wire UART, UART,

and SPI. USB1.1 is used for connection with a PC. The product works as the USB

device while the PC is the USB host. The communication protocol is compliant with

SBS data specification v1.1, and some extended commands are added according

to the application requirement. PC software (Battery Studio 2) is required to

interpret the Smart Battery data.

Figure 1-1. ATAVRBM300.

8-bit Atmel

Microcontrollers

Application Note

Rev. 8463A-AVR-11/11

2 Atmel AVR390

8463A-AVR-11/11

2 Quick start

The following steps are required to install and start using the Atmel ATAVRBM300:

1. Install Atmel AVR Battery Studio 2.

2. Connect ATAVRBM300 to ATBMxxx-EK.

3. Connect ATAVRBM300 to a USB port of the PC.

4. Start AVR Battery Studio 2.

The install file of AVR Battery Studio 2 can be downloaded from the Atmel website:

www.atmel.com/BM300. The 10-pin communication port of ATAVRBM300 should be

connected to the communication port of ATBMxxx-EK as shown in Figure 2-1.

Figure 2-1. ATAVRBM300 connect to ATBMxxx-EK.

About AVR Battery Studio 2 introduction please refer to application note Atmel

AVR363 AVR Battery Studio 2 user guide.

Atmel AVR390

8463A-AVR-11/11

3 Interfaces

3.1 USB interface

The USB interface on the Atmel ATAVRBM300 module is USB Type B. The

ATAVRBM300 connects to a host computer via this interface. The ATAVRBM300 is

also powered by the USB port from the PC. The PC must deliver minimum 50mA to

power the ATAVRBM300. USB (USB 1.1, HID communication class) is used to

communicate between the PC and the ATAVRBM300. A PC USB driver is included in

Atmel AVR Battery Studio 2. This PC software must be installed before connecting

the ATAVRBM300 the first time.

3.2 Interfaces to device

The ATAVRBM300 supports four communication interfaces: SMBus/TWI, SPI, UART,

and single-wire UART. A 10-pin flat parallel cable includes all the signals from the

ATAVRBM300.

Table 3-1. Pins definition.

Pin number Pin name Description

1 SDA SMBus data pin

2 SCL SMBus clock pin

3 TXD UART transmit pin

4 RWD UART receive pin

5 SCLK SPI serial clock

6 MISO SPI Bus Master input/Slave output

7 MOSI SPI Bus Master output/Slave input

8 /SS SPI Slave select input

9 R/T Single-wire UART transmit/receive pin

10 GND Ground

Figure 3-1. 10-pin header definition.

3.2.1 SMBus

To use the SMBus interface, three pins are required: SCL, SDA, and GND. SMBus

specification v1.1 is supported.

4 Atmel AVR390

8463A-AVR-11/11

3.2.2 SPI

To use the SPI interface five pins are required: SCLK, MISO, MOSI, /SS, and GND.

3.2.3 UART

The UART interface needs three pins: TXD, RXD, and GND. A command-response

mechanism is employed on the communication through this port. All the transactions

are initiated by the host.

3.2.4 Single-wire UART

The single-wire UART interface uses two pins: T/R and GND. Through the two pins,

half duplex communication is implemented: only transmit or receive can be performed

at one time.

Atmel AVR390

8463A-AVR-11/11

4 LED indication

4.1 Red LED

This red LED is used to indicate whether the tool is powered. It will be bright when it

is powered.

4.2 Bi-color LED

The red-green LED is used to indicate the communication status.

Table 4-1. Bi-LED colors indication.

Color Description

Red LED blinking ATAVRBM300 is transmitting data to the target board

Green LED blinking ATAVRBM300 is receiving data from the target board

5 Communication protocols

The communication protocol between Atmel BM300 and Smart Battery is compliant

with SBS data specification v1.1. In addition, some extended commands are added

according to the application requirement. For more details about supported

commands, refer to the user guide for the specific ATBMxxx-EK you are using.

6 Atmel AVR390

8463A-AVR-11/11

6 EVALUATION BOARD/KIT IMPORTANCE NOTICE

This evaluation board/kit is intended for use for FURTHER ENGINEERING,

DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY. It is

not a finished product and may not (yet) comply with some or any technical or legal

requirements that are applicable to finished products, including, without limitation,

directives regarding electromagnetic compatibility, recycling (WEEE), FCC, CE or UL

(except as may be otherwise noted on the board/kit). Atmel supplied this board/kit

“AS IS,” without any warranties, with all faults, at the buyer’s and further users’ sole

risk. The user assumes all responsibility and liability for proper and safe handling of

the goods. Further, the user indemnifies Atmel 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 and any other technical or legal concerns.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER

USER NOR ATMEL SHALL BE LIABLE TO EACH OTHER FOR ANY INDIRECT,

SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

No license is granted under any patent right or other intellectual property right of

Atmel covering or relating to any machine, process, or combination in which such

Atmel products or services might be or are used.

Mailing Address: Atmel Corporation, 2325 Orchard Parkway, San Jose, CA 95131

8463A-AVR-11/11

Atmel Corporation

2325 Orchard Parkway

San Jose, CA 95131

USA

Tel: (+1)(408) 441-0311

Fax: (+1)(408) 487-2600

www.atmel.com

Atmel Asia Limited

Unit 01-5 & 16, 19F

BEA Tower, Milennium City 5

418 Kwun Tong Road

Kwun Tong, Kowloon

HONG KONG

Tel: (+852) 2245-6100

Fax: (+852) 2722-1369

Atmel Munich GmbH

Business Campus

Parkring 4

D-85748 Garching b. Munich

GERMANY

Tel: (+49) 89-31970-0

Fax: (+49) 89-3194621

Atmel Japan

16F, Shin Osaki Kangyo Bldg.

1-6-4 Osaki Shinagawa-ku

Tokyo 104-0032

JAPAN

Tel: (+81) 3-6417-0300

Fax: (+81) 3-6417-0370

Atmel®, Atmel logo and combinations thereof, AVR®, and others are registered trademarks or trademarks of Atmel Corporation or its

subsidiaries. Other terms and product names may be trademarks of others.

Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to

any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL

TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS

ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE

LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION,

DAMAGES FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO

USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or

warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and

product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically

provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel products are not intended, authorized, or

warranted for use as components in applications intended to support or sustain life.

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