Microchip Technology ATWILC3000 Shield User Manual

ATWILC3000

ATWILC3000 Shield User Guide

Introduction

The ATWILC3000 Shield is an interface board designed to demonstrate the ATWILC3000-MR110CA, a
single chip IEEE® 802.11 b/g/n RF/Baseband/MAC network controller with Bluetooth® Low Energy. This
module is optimized for low-power applications. The ATWILC3000 module can be connected to the host
MCU board using any of the following interfaces:

• For Wi-Fi®, either Secure Digital Input/Outputs (SDIO) or Serial Peripheral Interface (SPI) is used.

• For Bluetooth, Universal Asynchronous Receiver/Transmitter (UART) is used.

Figure 1. ATWILC3000 Shield Board

Features

• Debug I2C and UART Header Footprints

• External Power Supply Header

• Current Measurement Header

• Power and User LED

• Chip Antenna

• Supports 32.768 kHz Low-Power Surface Mount Device (SMD) Crystal Oscillator

• Arduino Shield Stacking Connector

– Supports Wi-Fi through SDIO by default. Pinout is compatible with ATSAMA5D4-XULT

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ATWILC3000

– Supports Wi-Fi through SPI (optional). Pinout is compatible with Arduino header specification

– Supports Bluetooth through UART

• Raspberry Pi Stacking Connector

– Supports Wi-Fi through SDIO or SPI

– Supports Bluetooth through UART

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User Guide

DS50002769A-page 2

Table of Contents

Introduction......................................................................................................................1

Features.......................................................................................................................... 1

1. Kit Overview.............................................................................................................. 4

2. ATWILC3000 Shield Peripheral Configuration...........................................................5

3. Design Documentation and Relevant Links...............................................................6

4. Hardware Specifications............................................................................................7

4.1. ATWILC3000 Shield Arduino Shield Stacking Connectors.......................................................... 7

4.2. ATWILC3000 Shield Raspberry Pi Stacking Connector...............................................................9

4.3. Power Supply Connector............................................................................................................11

4.4. Current Measurement Header....................................................................................................11

4.5. Debug Connectors......................................................................................................................11

5. CE and FCC............................................................................................................ 13

6. Hardware Revision History and Known Issues........................................................14

6.1. Identifying Product ID and Revision........................................................................................... 14

6.2. Revision......................................................................................................................................14

7. Document Revision History..................................................................................... 15

The Microchip Web Site................................................................................................ 16

Customer Change Notification Service..........................................................................16

Customer Support......................................................................................................... 16

Microchip Devices Code Protection Feature................................................................. 16

Legal Notice...................................................................................................................17

Trademarks................................................................................................................... 17

Quality Management System Certified by DNV.............................................................18

Worldwide Sales and Service........................................................................................19

© 2018 Microchip Technology Inc.

User Guide

DS50002769A-page 3

1. Kit Overview

The ATWILC3000 Shield is a shield board containing the low-power ATWILC3000-MR110CA 802.11 b/g/n
IoT module. By default, the ATWILC3000 Shield is configured to use with the SDIO interface which is
compatible with SAMA5D4-XULT.

Figure 1-1. ATWILC3000 Shield Evaluation Kit Overview

ATWILC3000-MR110CA

Module

Raspberry Pi

40-pin Connector

Wi-Fi

UART

Debug

I2C

ATWILC3000

Kit Overview

Current

Measurement

Header

External

Power
Supply

Arduino

Compatible

Headers

Power & Status LED

The ATWILC3000 Shield can also be configured to use with other host MCU boards using SPI peripheral
interface exposed through Arduino compatible connectors. For more details, see ATWILC3000 Wiki for
the list of supported boards and related documents.

32 KHz Crystal Oscillator

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ATWILC3000 Shield Peripheral C...

2. ATWILC3000 Shield Peripheral Configuration

The ATWILC3000 module on the shield board can communicate with the host board using either SDIO or
SPI. By default, SDIO is supported. A resistor combination must be modified to add SPI support. The
following table provides resistor configuration details.

Table 2-1. ATWILC3000 Shield Resistor Configuration for SDIO/SPI

Peripheral Interface Required Modification for Resistors

SDIO Mounted resistors: R311, R218, R219, R220, R221

Not mounted resistors: R214, R215, R216, R217, R310

SPI Mounted resistors: R214, R215, R216, R217, R310

Not mounted resistors: R218, R219, R220, R221, R311

Figure 2-1. ATWILC3000 Shield SDIO-SPI Resistors

ATWILC3000

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Design Documentation and Relevant Links

3. Design Documentation and Relevant Links

The following list contains links to the most relevant documents and software available for the
ATWILC3000 Shield.

• Xplained Boards is a series of small-sized and easy-to-use evaluation kits for microcontrollers and

other products. It consists of low-cost MCU boards for evaluation and demonstration of features
and capabilities of different MCU families.

• Atmel Studio provides a free Atmel IDE for development of C/C++ and assembler code for

microcontrollers.

• Data Visualizer is a program used for processing and visualizing data. The Data Visualizer can

receive data from various sources, such as the embedded debugger data gateway interface found
on Xplained Pro boards and COM ports.

• ATWILC3000 page provides information and documentation on the Microchip ATWILC3000-

MR110CA module.

• ATWILC3000 Wireless Wiki page is an online directory to access source code and documentation

for the ATWILC3000.

• SMART SAMA5 ARM® Cortex® based MPUs page is an online directory to access the tools and

software for SAMA5 Cortex-A5-Based Embedded MPUs.

ATWILC3000

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4. Hardware Specifications

This chapter describes the connectors and header of the ATWILC 3000 Shield board.

4.1 ATWILC3000 Shield Arduino Shield Stacking Connectors

The ATWILC3000 Shield contains Arduino shield stacking connectors, which are used to connect the
board to an MCU base board. This is also used to expose the unused pins to the user. The pinout
definition for the shield connectors are given in the following tables.

Table 4-1. J200 Stacking Connector

Pin Number Function Description

1 SD_DAT2 SDIO Data 2

2 SD_DAT1 SDIO Data 1

3 SPI_SS SPI select. By default, this pin is not connected. Mount

R217 (0Ω) to connect.

ATWILC3000

Hardware Specifications

4 SPI_MOSI SPI MOSI. By default, this pin is not connected. Mount

R216 (0Ω) to connect.

5 SPI_MISO SPI MISO. By default, this pin is not connected. Mount

R215 (0Ω) to connect.

6 SPI_SCK SPI Clock. By default, this pin is not connected. Mount

R214 (0Ω) to connect.

7 GND Ground

8 NC Not connected

9 NC Not connected

10 NC Not connected

Table 4-2. J201 Stacking Connector

Pin Number Function Description

1 NC Not connected

2 NC Not connected

3 NC Not connected

4 VCC_INT_P3V3 3.3V power supply. Mount jumper cap on J300-1 and

J300-2 to use this supply.

5 NC Not connected

6 GND Ground

7 GND Ground

8 NC Not connected

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ATWILC3000

Hardware Specifications

Table 4-3. J202 Stacking Connector

Pin Number Function Description

1 SD_DAT3 SDIO Data 3

2 SD_CLK SDIO Clock

3 SD_CMD SDIO command

4 PWML2/RTC_CLK By default, this pin is not connected. Mount R315 (0Ω) to

connect.

5 SD_DAT0 SDIO Data 0

6 SLEEP Sleep mode control

7 UART_RX Bluetooth® UART RXD. By default, this pin is not

connected. Mount R222 (0Ω) to connect.

8 UART_TX Bluetooth® UART TXD. By default, this pin is not

connected. Mount R223 (0Ω) to connect.

Table 4-4. J203 Stacking Connector

Pin Number Function Description

1 RST ATWILC3000 Reset to be controlled by the host MCU

2 IRQN Host interrupt request output

3 RTS Bluetooth® UART RTS output. By default, this pin is not

connected. Short J208 to connect.

4 CTS Bluetooth® UART CTS input. By default, this pin is not

connected. Short J209 to connect.

5 CHIP_EN Chip enable

6 GPIO3/SUSPEND GPIO signal

7 NC Not connected

8 NC Not connected

Table 4-5. J204 Stacking Connector

Pin Number Function Description

1 UART_RX_1 Bluetooth® UART receive

2 UART_TX_1 Bluetooth® UART transmit

3 NC Not connected

4 NC Not connected

5 NC Not connected

6 NC Not connected

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Pin Number Function Description

7 NC Not connected

8 NC Not connected

Table 4-6. J206 Stacking Connector

Pin Number Function Description

20 UART_RTS Bluetooth® UART RTS output

21 UART_CTS Bluetooth® UART CTS input

35 GND Ground

36 GND Ground

4.2 ATWILC3000 Shield Raspberry Pi Stacking Connector

The ATWILC3000 Shield contains a Raspberry Pi compatible 40-pin stacking connector used to connect
the board to a Raspberry Pi base board. This is also used for exposing the unused pins to the user. The
pinout definition for the Raspberry Pi connector is given in the following table.

Table 4-7. J207 Stacking Connector

ATWILC3000

Hardware Specifications

Pin Number Function Description

1 VCC_INT_P3V3 3.3V power supply. Insert jumper cap on J300-1 and

J300-2 to use this power supply.

2 NC Not connected

3 GPIO2/SUSPEND GPIO signal

4 NC Not connected

5 CHIP_EN ATWILC3000 Chip enable is controlled by the host

MCU

6 GND Ground

7 IRQN Host interrupt request output

8 UART_RX Bluetooth® UART receive

9 GND Ground

10 UART_TX Bluetooth® UART transmit

11 CTS Bluetooth® UART CTS input

12 GEN1/RTC_CLK By default, this pin is not connected. Mount R315 (0Ω)

to connect.

13 SDDATA3 SDIO Data 3. By default, this pin is not connected.

Mount R227 (0Ω) to connect.

14 GND Ground

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ATWILC3000

Hardware Specifications

Pin Number Function Description

15 SDCLK SDIO Clock. By default, this pin is not connected.

Mount R228 (0Ω) to connect.

16 SDCMD SDIO Command. By default, this pin is not connected.

Mount R232 (0Ω) to connect.

17 NC Not connected

18 SDDATA0 SDIO Data 0. By default this pin is not connected.

Mount R229 (0 Ω) to connect.

19 SPI MOSI SPI Master Output Slave Input. By default, this pin is

not connected. Mount R216 (0Ω) to connect.

20 GND Ground

21 SPI MISO SPI Master Input Slave Output. By default this pin is

not connected. Mount R215 (0Ω) to connect.

22 SDDATA1 SDIO Data 1. By default, this pin is not connected.

Mount R230 (0Ω) to connect.

23 SPI SCLK SPI Clock. By default, this pin is not connected. Mount

R214 (0Ω) to connect.

24 SPI CS0 SPI Select. By default, this pin is not connected. Mount

R217 (0Ω) to connect.

25 GND Ground

26 SLEEP Sleep mode control

27 NC Not connected

28 NC Not connected

29 NC Not connected

30 GND Ground

31 NC Not connected

32 RST ATWILC3000 Reset is controlled by host MCU

33 NC Not connected

34 GND Ground

35 NC Not connected

36 RTS Bluetooth® UART receive output. By default, this pin is

not connected. Short J208 to connect.

37 SDDATA2 SDIO Data 2. By default, this pin is not connected.

Mount R231 (0Ω) to connect.

38 NC Not connected

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Pin Number Function Description

39 GND Ground

40 NC Not connected

4.3 Power Supply Connector

The ATWILC3000 Shield is powered either from the shield connector or from an external power supply.
The header (J300) is used to switch between 3.3V supply from the shield connector or a 3.3V external
power supply. The following tables provide pin details and the connector configuration of the power
supply connector.

Table 4-8. ATWILC3000-SHLD J300 Power Supply Connector

Pin Number Description

1 3.3V internal power supply from shield connector

2 3.3V external power supply

3 Ground

ATWILC3000

Hardware Specifications

Table 4-9. ATWILC3000-SHLD Power Supply Connector Configuration

Power Supply J300 Connector Configuration

To set 3.3V power supply from either Arduino
Shield or Raspberry Pi

To set 3.3V external power supply Remove jumper cap from J300-1 and J300-2. Apply

4.4 Current Measurement Header

The current measurement header (J301) is used to measure the current consumed by the ATWILC3000
module using an ammeter. There are two 0Ω resistors, R304 and R305, that can be used to measure the
current consumed by individual power rails, such as VDDIO, and VBAT respectively.

4.5 Debug Connectors

The debug I2C (J302) and Wi-Fi UART (J307) connectors are not mounted on the board. The following
table provides a description of the connectors.

Table 4-10. Debug I2C Connector

Pin on I2C Connector Pin on ATWILC3000 Module Function

Place jumper cap between J300-1 and J300-2, and
J300-3 must not be not connected.

external power to J300-2 and J300-3.

1 10 I2C SCL

2 1 Ground

3 11 I2C SDA

4 — Not connected

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ATWILC3000

Hardware Specifications

Table 4-11. Wi-Fi UART Connector

Pin on Extension Port Pin on ATWILC3000 Module Function

1 17 UART Receiver

2 16 UART Transmitter

3 1 Ground

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5. CE and FCC

The unit is tested at SDIO clock frequency of 29.34 MHz in accordance to the essential requirements and
other relevant provisions of:

• Emission

– FCC part 15 subpart B: 2013 (Class B) EN 55022:2010 Class B

– EN 55024:2010 Class B

• Immunity

– EN 55024:2010

– EN 61000-4-2:2009 contact: level 2 (±4kV), air: level 2 (±8kV)

– EN 61000-4-3:2006+A2:2010, 80 MHz to 1000 MHz, level 2 (3V/m)

– EN 61000-4-8:2010 level 2 (3A/m), continuous field

The technical construction file is located at:

Microchip Norway
Vestre Rosten 79
7075 Tiller
Norway

ATWILC3000

CE and FCC

Every effort is made to minimize the electromagnetic emissions from the product. However, under certain
conditions, the system (this product connected to a target application circuit) may emit individual
electromagnetic component frequencies, which exceed the maximum values allowed by the above
mentioned standards. The frequency and magnitude of the emissions are determined by several factors,
including layout and routing of the target application, where the product is used.

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DS50002769A-page 13

Hardware Revision History and Known Issues

6. Hardware Revision History and Known Issues

6.1 Identifying Product ID and Revision

The revision and product identifier of the ATWILC3000 Shield is available on the sticker on the bottom
side of the PCB. The identifier and revision are printed in plain text as A09-nnnn\rr, where nnnn is the
identifier and rr is the revision. In addition, the label contains a 10-digit serial number unique to each
board.

The product identifier for the ATWILC3000 Shield is A09-2616.

6.2 Revision

Revision 4 is the initially released revision and there are no known issues.

Revision 5 has J302 and J303 as Do Not Populate.

Revision 6 and 7 has the dimension of PCB cutout reduced from 14.68 mm to 11.84 mm, as per the
ATWILC3000-MR110CA module datasheet recommendation for improved radiated performance.

ATWILC3000

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DS50002769A-page 14

7. Document Revision History

Rev A - 06/2018

Section Changes

Document • Updated all the links in Design Documentation and Relevant Links section

• Updated the functions and descriptions of J207 Stacking Connector

• Added hardware revision details for Revision 5, 6 and 7

• Updated the document from Atmel to Microchip template

• Assigned a new Microchip document number

Previously Released Atmel Revisions

Doc. Rev. Date Comment

42731B 04/2017 Added section regulatory notice with Argentina certification information

42731A 05/2016 Initial document release

ATWILC3000

Document Revision History

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User Guide

DS50002769A-page 15

ATWILC3000

The Microchip Web Site

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a means to make files and information easily available to customers. Accessible by using your favorite
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• General Technical Support – Frequently Asked Questions (FAQ), technical support requests,

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To register, access the Microchip web site at http://www.microchip.com/. Under “Support”, click on
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Customer Support

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

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• Field Application Engineer (FAE)

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Customers should contact their distributor, representative or Field Application Engineer (FAE) for support.
Local sales offices are also available to help customers. A listing of sales offices and locations is included
in the back of this document.

Technical support is available through the web site at: http://www.microchip.com/support

Microchip Devices Code Protection Feature

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the
market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of
these methods, to our knowledge, require using the Microchip products in a manner outside the
operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is
engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

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ATWILC3000

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their
code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the
code protection features of our products. Attempts to break Microchip’s code protection feature may be a
violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software
or other copyrighted work, you may have a right to sue for relief under that Act.

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All other trademarks mentioned herein are property of their respective companies.

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ATWILC3000

©

2018, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.

ISBN: 978-1-5224-3263-0

Quality Management System Certified by DNV

ISO/TS 16949

Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer
fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC
DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design and manufacture of development
systems is ISO 9001:2000 certified.

®

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Worldwide Sales and Service

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