WILCS02 M.2 Wi-Fi Module Card User's Guide

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Document DEVICE REPORTWILCS02-M.2-Wi-Fi-Module-Card-User-Guide-DS50003702

WILCS02 M.2 Wi-Fi® Module Card User's Guide
EV59Y78A
www.microchip.com Product Pages: WILCS02PE, WILCS02UE
Introduction
This user guide provides details on the WILCS02 M.2 Wi-Fi® Module Card. It is an M.2 interface board that supports the IEEE® 802.11 b/g/n standard. It is designed to demonstrate the features and functionalities of
Microchip's low-power Wi-Fi WILCS02UE Module.
Features
· M.2 Key-E Interface with Two Main Interfaces Secure Digital Input Output (SDIO) Serial Peripheral Interface (SPI)
· Packet Traffic Arbitration (PTA) · Powered from M.2 Host Board via M.2 Connector 3.3V VCC
· Hardware-Based Three-Wire PTA Interface to Address Wi-Fi®/Bluetooth® Co-existence
· Configurable Strapping Pins for Host Interface Selection · Device Firmware Update (DFU) · Functional APIs/Drivers Through SPI with Host MCU · Functional APIs/Drivers Through SDIO with Host MPU for Linux-Based Systems · U. FL Antenna Connector · Dimensions: 22.00 mm x 30.00 mm x 2.1 mm

User Guide
© 2024-2025 Microchip Technology Inc. and its subsidiaries

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EV59Y78A
Table of Contents
Introduction .......................................................................................................................................................................... 1
Features................................................................................................................................................................................. 1
1. Quick References...........................................................................................................................................................3 1.1. Reference Documentation................................................................................................................................3 1.2. Hardware Prerequisites.................................................................................................................................... 3 1.3. Acronyms and Abbreviations........................................................................................................................... 3
2. Kit Overview................................................................................................................................................................... 4 2.1. Kit Contents........................................................................................................................................................ 4
3. Hardware........................................................................................................................................................................6 3.1. Power Supply......................................................................................................................................................7 3.2. Firmware Update............................................................................................................................................... 7 3.3. M.2 Connector Pin Specification...................................................................................................................... 7
4. Appendix A: Reference Circuit................................................................................................................................... 10
5. WILCS02 M.2 Wi-Fi® Module Card Bill of Materials.................................................................................................11
6. Appendix B: Regulatory Approval............................................................................................................................. 12 6.1. United States.................................................................................................................................................... 12 6.2. Canada.............................................................................................................................................................. 12
7. Document Revision History....................................................................................................................................... 14
Microchip Information....................................................................................................................................................... 15 Trademarks.................................................................................................................................................................. 15 Legal Notice..................................................................................................................................................................15 Microchip Devices Code Protection Feature............................................................................................................15

User Guide
© 2024-2025 Microchip Technology Inc. and its subsidiaries

DS50003702B - 2

EV59Y78A Quick References

1. Quick References
1.1 Reference Documentation
· WILCS02IC and WILCS02 Family Data Sheet (DS70005557)
· WILCS02 Wi-Fi® Link Controller Application Developer's Guide
1.2 Hardware Prerequisites
· WILCS02 M.2 Wi-Fi® Module Card Kit (EV59Y78A)
· SAM9x75 Curiosity
1.3 Acronyms and Abbreviations

Table 1-1. Acronyms and Abbreviations
Acronyms and Abbreviations BOM DFU I2C LED MCU NC OOB PTA RX SDIO SCL SDA SPI TX UART USB

Description Bill of Materials Device Firmware Update Inter-Integrated Circuit Light Emitting Diode Microcontroller Unit Not Connected Out of the Box Packet Traffic Arbitration Receiver Secure Digital Input Output Serial Clock Serial Data Serial Peripheral Interface Transmitter Universal Asynchronous Receiver-Transmitter Universal Serial Bus

User Guide
© 2024-2025 Microchip Technology Inc. and its subsidiaries

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EV59Y78A Kit Overview
2. Kit Overview
The WILCS02 M.2 Wi-Fi® Module Card is an M.2 board containing the low-power WILCS02UE Module.
The signals required for the control interface are connected to the M.2 Key-E connector of the M.2 board for connectivity, security and ease-of-use requirements.
Note:The following sample silkscreen is a WIxCS02 M.2 Wi-Fi® Module Card, which includes the
WILCS02 Link controller module with Link Controller Firmware
Figure 2-1. WILCS02 M.2 Wi-Fi® Module Card (EV59Y78A) Top View
WILCS02UE Module (U101)
Key-E Connectors
Figure 2-2. WILCS02 M.2 Wi-Fi® Module Card (EV59Y78A) Bottom View

2.1 Kit Contents
The EV59Y78A (WILCS02 M.2 Wi-Fi® Module Card) kit contains the following:
1. WILCS02 M.2 Wi-Fi Module Card mounted with the WILCS02UE Module 2. Antenna (RFA-02-L2H1) and antenna holder (BPC2J5)
User Guide
© 2024-2025 Microchip Technology Inc. and its subsidiaries

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EV59Y78A Kit Overview
3. M.2 screw for SAM9x75
Note:If any of the above items are missing in the kit, go to support.microchip.com or contact your local Microchip Sales office. In this user guide, there is a list of Microchip offices for sales and services provided on the last page.

User Guide
© 2024-2025 Microchip Technology Inc. and its subsidiaries

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EV59Y78A Hardware
3. Hardware
This chapter describes the hardware features of the WILCS02 M.2 Wi-Fi® Module Card. Figure 3-1. WILCS02 M.2 Wi-Fi® Module Card Block Diagram

VDD/VDDIO (Pin 20,23)

MCLR (Pin 4)

UART2_TX (Pin 27)

Debug UART Header-DNP

M.2 Key-E Connector M.2 Key-E Connector

RTCC OSC OUT (Pin 22)

DNP

PTA WLAN ACTIVE (Pin 5) RTCC OSC IN/PTA BT ACTIVE (Pin 21)
PTA BT PRIO (Pin 6)

DFU_RX/STRAP1 (Pin 10) DFU_TX/STRAP2 (Pin 26)

INTOUT (Pin 13) Reserved (Pin 2,3,11)

SDIO/SPI (Pin 14,15,16,17,18,19)

UART1_TX/UART1_RX (Pin 14,19)

Microchip Devices

WILCS02UE Module

RTCC Oscillator

Note:
1. Using Microchip's total system solution, which includes complementary devices, software drivers and reference designs, is highly recommended to ensure the proven performance of the WILCS02 M.2 Wi-Fi Module Card. For more details, go to support.microchip.com or contact your local Microchip Sales office.

Table 3-1. Microchip Components used in the WILCS02 M.2 Wi-Fi® Module Card

S.No. 1

Designator U101

Manufacturer Part Number WILCS02UE-I

Description
MCHP RF Wi-Fi® 802.11 b/g/n WILCS02UE-I

User Guide
© 2024-2025 Microchip Technology Inc. and its subsidiaries

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3.1 3.2
3.3

Power Supply

EV59Y78A Hardware

From the M.2 host platform, the M.2 Key-E interface supplies a 3.3V power source to the WILCS02
M.2 Wi-Fi® Module Card. The module's VDD and VDDIO pin are shorted on board.
Firmware Update
The WILCS02 M.2 Wi-Fi® Module Card comes with pre-programmed firmware. Microchip periodically
releases firmware to fix reported issues or to implement the latest feature support.

Note:For guidance on firmware updates, refer to the WILCS02 Wi-Fi Link Controller Application Developer's Guide.
M.2 Connector Pin Specification

The following table provides details on the interface between the M.2 connector and the WILCS02UE module.

Table 3-2. M.2 Connector Pin Specification

M.2 Pin Number

M.2 Pin Name

GND

USB_D+

USB_D-

GND

SDIO_CLK/SYSCLK(I) (0/1.8V)

SDIO_CMD(I/O)(0/1.8V)

SDIO_DATA0(I/O) (0/1.8V)

SDIO_DATA1(I/O) (0/1.8V)

SDIO_DATA2(I/O) (0/1.8V)

SDIO_DATA3(I/O) (0/1.8V)

SDIO_WAKE# (O) (0/1.8V)

SDIO_RESET#/

TX_BLANKING (I)

(0/1.8V)

27 ADD-IN CARD KEY E
29

GND

PERp0

PERn0

GND

PETp0

PETn0

GND

REFCLKp0

M.2 Connector Pin Description GND USB differential datapositive USB differential datanegative GND SDIO clock input SDIO command line SDIO data line 0
SDIO data line 1
SDIO data line 2
SDIO data line 3
Wake-up host (output)
--
-- -- -- -- -- -- -- --

WILCS02UE Module Pin WILCS02UE Module Pin

Description

Number

GND

PTA_WLAN_ACTIVE

Pin 5

PTA_BT_PRIO -- SD_CLK/UART1_RX SD_CMD/SCK1 SD_DATA0/SDO1

Pin 6 GND Pin 19 Pin 18 Pin 17

SD_DATA1/CS1

Pin 16

SD_DATA2/SDI1

Pin 15

SD_DATA3/UART1_TX Pin 14

INTOUT

Pin 13

GND

User Guide
© 2024-2025 Microchip Technology Inc. and its subsidiaries

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...........continued
M.2 Pin Number 49 51 53
55 57 59 61 63 65 67 69 71 73 75 2 4 6 8
10
12
14 16 18 20
22 24 26 28 30 32 34
36 38 40 42 44 46

EV59Y78A Hardware

M.2 Pin Name

M.2 Connector Pin Description

WILCS02UE Module Pin WILCS02UE Module Pin

Description

Number

REFCLKn0

GND

CLKREQ0# (I/O)(0/1.8V/ 3.3V)

PEWAKE0# (I/O)(0/1.8V/ 3.3V)

GND

RESERVED/PERp1

RESERVED/PERn1

GND

RESERVED/PETp1

RESERVED/PETn1

GND

RESERVED/REFCLKp1 --

RESERVED/REFCLKn1 --

GND

3.3V

3.3V DC power

VDD

Pin 20

3.3V

3.3V DC power

VDD

Pin 20

LED_1# (O)(OD)

PCM_CLK/I2S_SCK (I/O) (0/1.8V)

PCM_SYNC/I2S_WS (I/O) (0/1.8V)

PCM_OUT/I2S_SD_OUT (O)(0/1.8V)

PCM_IN/I2S_SD_IN (I) (0/1.8V)

LED_2# (O)(OD)

VIO_CFG (O)

UART_WAKE# (O) (0/3.3V)

Wake-up Host (output) INTOUT

Pin 13

UART_TXD (O)(0/1.8V)

UART Serial Data Output

SD_DATA3/UART1_TX Pin 14

ADD-IN CARD KEY E

UART_RXD (I)(0/1.8V) UART_RTS (O)(0/1.8V)
UART_CTS (I)(0/1.8V) VENDOR DEFINED VENDOR DEFINED VENDOR DEFINED COEX3 (I/O)(0/1.8V) COEX_TXD (O)(0/1.8V)

UART Serial Data Input SD_CLK/UART1_RX

UART Request To Send (output)

SD_DATA2/SDI1

UART Clear To Send (input)

SD_DATA1/CS1

Mode selection 1/DFU 1 DFU_RX/STRAP1

WAKE (input)

Reserved

Mode selection 2/DFU 2 DFU_TX/STRAP2

PTA_BT_PRIO (input) PTA_BT_PRIO

PTA_WLAN_Active (output)

PTA_WLAN_Active

Pin 19 Pin 15
Pin 16 Pin 10 Pin 11 Pin 26 Pin 6 Pin 5

User Guide
© 2024-2025 Microchip Technology Inc. and its subsidiaries

DS50003702B - 8

EV59Y78A Hardware

...........continued

M.2 Pin Number

M.2 Pin Name

M.2 Connector Pin Description

WILCS02UE Module Pin WILCS02UE Module Pin

Description

Number

COEX_RXD (I)(0/1.8V)

PTA_BT_Active (input)

RTCC_OSC_IN/ PTA_BT_ACTIVE

Pin 21

SUSCLK(I)(0/1.8V/3.3V)

32.768 kHz clock input RTCC_OSC_IN/ from M.2 host platform PTA_BT_ACTIVE

Pin 21

PERST0# (I)(0/1.8V/ 3.3V)

W_DISABLE2# (I) (0/1.8V/3.3V)

Master Clear (input) MCLR

Pin 4

W_DISABLE1# (I) (0/1.8V/3.3V)

I2C_DATA (I/O)(0/1.8V) I2C data

Reserved

Pin 3

I2C_CLK (I)(0/1.8V)

I2C clock

Reserved

Pin 2

ALERT# (O)(0/1.8V)

Wake-up host (output) INTOUT

Pin 13

VIO1.8V

UIM_SWP/PERST1#

UIM_POWER_SNK/ CLKREQ1#

UIM_POWER_SRC/ GPIO_1/PEWAKE1#

3.3V

3.3V DC power

VDD

Pin 20

3.3V

3.3V DC power

VDD

Pin 20

Note:The PTA functionality is not supported while using the RTCC Oscillator.

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4. Appendix A: Reference Circuit
Figure 4-1. Schematic Diagram

EV59Y78A Appendix A: Reference Circuit

DS50003702B - 10

EV59Y78A WILCS02 M.2 Wi-Fi® Module Card Bill of Materials
5. WILCS02 M.2 Wi-Fi® Module Card Bill of Materials
Go to the EV59Y78A product web page for the WILCS02 M.2 Wi-Fi Module Card's Bill of Materials (BOM).

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EV59Y78A Appendix B: Regulatory Approval
6. Appendix B: Regulatory Approval
This equipment (WILCS02 M.2 Wi-Fi® Module Card/EV59Y78A) is an evaluation kit and not a finished
product. It is intended for laboratory evaluation purposes only. It is not directly marketed or sold to the general public through retail; it is only sold through authorized distributors or through Microchip. Using this requires a significant engineering expertise towards understanding of the tools and relevant technology, which can be expected only from a person who is professionally trained in the technology.
Regulatory compliance settings have to follow the WILCS02 module certifications. The following regulatory notices are to cover the requirements under the regulatory approval.
6.1 United States
The WILCS02 M.2 Wi-Fi® Module Card (EV59Y78A) contains the WILCS02 module, which has
received Federal Communications Commission (FCC) CFR47 Telecommunications, Part 15 Subpart C "Intentional Radiators" single-modular approval in accordance with Part 15.212 Modular Transmitter approval.
Contains FCC ID: 2ADHKWIXCS02U This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Important:FCC Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for uncontrolled environment. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 8 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. This transmitter is restricted for use with the specific antenna(s) tested in this application for certification.
Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.
6.2 Canada
The WILCS02 M.2 Wi-Fi® Module Card (EV59Y78A) contains the WILCS02 module, which has been
certified for use in Canada under Innovation, Science and Economic Development Canada (ISED, formerly Industry Canada) Radio Standards Procedure (RSP) RSP-100, Radio Standards Specification (RSS) RSS-Gen and RSS-247.

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EV59Y78A Appendix B: Regulatory Approval
Contains IC: 20266-WIXCS02U This device contains license-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada's license-exempt RSS(s). Operation is subject to the following two conditions: 1. This device may not cause interference; 2. This device must accept any interference, including interference that may cause undesired operation of the device. L'émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d'Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes: 1. L'appareil ne doit pas produire de brouillage; 2. L'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le
fonctionnement.
This equipment complies with radio frequency exposure limits set forth by Innovation, Science and Economic Development Canada for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 cm between the device and the user or bystanders.
Cet équipement est conforme aux limites d'exposition aux radiofréquences définies par d'Innovation, Sciences et Développement économique Canada pour un environnement non contrôlé. Cet équipement doit être installé et utilisé avec un minimum de 20 cm de distance entre le dispositif et l'utilisateur ou des tiers.

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EV59Y78A Document Revision History

7. Document Revision History
The document revision history describes the changes that were implemented in the document. The changes are listed by revision, starting with the most current publication.

Revision B
A

Date 1/2025
10/2024

Section Kit Overview
Document Document

Description Added a note on WIxCS02 M.2
Wi-Fi® Module Card silkscreen
Updating the module name from "WIxCS02" to "WILCS02". Initial revision

DS50003702B - 14

EV59Y78A
Microchip Information
Trademarks
The "Microchip" name and logo, the "M" logo, and other names, logos, and brands are registered and unregistered trademarks of Microchip Technology Incorporated or its affiliates and/or subsidiaries in the United States and/or other countries ("Microchip Trademarks"). Information regarding Microchip Trademarks can be found at https://www.microchip.com/en-us/about/legalinformation/microchip-trademarks.
ISBN: 979-8-3371-0347-1
Legal Notice
This publication and the information herein may be used only with Microchip products, including to design, test, and integrate Microchip products with your application. Use of this information in any other manner violates these terms. Information regarding device applications is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. Contact your local Microchip sales office for additional support or, obtain additional support at www.microchip.com/en-us/support/design-help/ client-support-services.
THIS INFORMATION IS PROVIDED BY MICROCHIP "AS IS". MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE, OR WARRANTIES RELATED TO ITS CONDITION, QUALITY, OR PERFORMANCE.
IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL, OR CONSEQUENTIAL LOSS, DAMAGE, COST, OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE INFORMATION OR ITS USE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY RELATED TO THE INFORMATION OR ITS USE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THE INFORMATION.
Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights unless otherwise stated.
Microchip Devices Code Protection Feature
Note the following details of the code protection feature on Microchip products:
· Microchip products meet the specifications contained in their particular Microchip Data Sheet.
· Microchip believes that its family of products is secure when used in the intended manner, within operating specifications, and under normal conditions.
· Microchip values and aggressively protects its intellectual property rights. Attempts to breach the code protection features of Microchip products are strictly prohibited and may violate the Digital Millennium Copyright Act.
· Neither Microchip nor any other semiconductor manufacturer can guarantee the security of its code. Code protection does not mean that we are guaranteeing the product is "unbreakable". Code protection is constantly evolving. Microchip is committed to continuously improving the code protection features of our products.

DS50003702B - 15