NXP 88MW32X 802.11n Wi-Fi® Microcontroller SoC User guide

UM11457

88MW32X Reference Design User Guide

Rev. 1 — 4 August 2020 User manual

Document information

Information Content

Keywords Evaluation kit, reference design module, adapter board, Wi-Fi microcontroller,

power supply, antennas, GPIO, configuration pins

Abstract User guide for 88MW320 and 88MW322 evaluation kits

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Revision history

Document revision history

Revision Date Description

Rev.1 4-Aug-2020 Initial release

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1 Introduction

1.1 Overview

This document is a user guide for the RD-88MW322-QFN-1B-2A-v1.0 evaluation

kit. This evaluation kit is based on the NXP 88MW322, an IEEE 802.11b/g/n Wi-Fi

microcontroller.

The RD-88MW320-QFN-1B-2A-v1.0 evaluation kit, which is based on the NXP

88MW320, is similar.

Table 1 summarizes the key differences between 88MW322 and 88MW320 (hereafter

referred to as “Wireless SoC”).

Table 1. 88MW320 and 88MW322 key differences

Device Package USB On-The-

Go Interface

# of GPIO # of General

Purpose Timer

88MW320 68-pin QFN, 8x8 mm No Up to 35 2

88MW322 88-pin QFN, 10x10 mm Yes Up to 50 4

1.2 Related documents

The related documents are available on http://www.nxp.com.

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2 Evaluation kit overview

The evaluation kit includes a reference design module mounted on an adapter board.

The reference design module is based on NXP 88MW322 wireless microcontroller.

Figure 1 shows a picture of the evaluation kit. The reference design module is highlighted

in yellow.

Figure 1. Reference design mounted on an adapter board

2.1 Kit package list

• RD-88MW322-QFN-1B-2A-v1.0 reference design module

• AB-88MW3XX_V3.0 adapter board.

• USB type A to USB mini-A cable

Note: The reference design module is mounted on the Adapter board.

The adapter board may be powered through USB, J3. However it is recommended to use

an external 5V/1A AC adapter. The AC adapter is not included.

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2.2 Reference design module features

The reference design module is a stamp type module with the features shown in Table 2.

Table 2. Reference design key feature summary

Parts Features

Wireless SoC, U1 NXP 88MW322 IEEE 802.11b/g/n WLAN

microcontroller

Memory, U3 4 Mbyte QSPI flash

Antenna 2.4 GHz PCB antenna

W.FL RF connector for external antenna

RF SPDT switch, U2 Single-Pole, Double-Throw RF switch for

antenna diversity

Power supply 3.3 V

Figure 2 shows the reference design module block diagram.

Figure 2. Reference design module block diagram

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2.3 Adapter board

The adapter board is a 62 x 95 mm PCB with the key features shown in Table 3.

Table 3. Adapter board key feature summary

Parts Features

Power jack (5V

), J2 2 mm center-pin with 2.5 Amp rated DC jack

External battery connector, HD3 1x2 with 0.025 inch square pin header

USB OTG connector, J1 USB Micro-AB 5-pin receptacle

Virtual UART connector, J3 USB Mini-B 5-pin receptacle

GPIO header, HD2 and HD4 2x16 with 0.5 mm square pin in 2 mm pitch header

Reset switch, S1 Push-on tactile button switch

LED, D9 Green, SMD (5V Power supply indicator)

LED, D1 Green, SMD (USB OTG 5V supply indicator)

LED, D2 Red, SMD (USB OTG over-current indicator)

Sleep clock, Y2 32.768 kHz RTC crystal oscillator ± 25 ppm

Voltage regulator, U13 On-board 5V to 3.3V regulator

Figure 3 shows the adapter board block diagram. The reference design module is

highlighted in yellow.

Figure 3. Adapter board block diagram

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2.4 Power supply options

The reference design module can be powered by one of the three different sources

through the adapter board.

Table 4 shows how to select the power supply source by configuring the jumper on the

adapter board.

Table 4. Power supply source selection and configuration

supply source Jumper configuration

USB Port 5V of Test PC

• Supply via Virtual UART interface connector, J3

Connect

JP4[2-3]

JP7[1-2]

JP8[1-2]

JP9[1-2]

AC adapter

• Supply via the DC Power jack, J2

Connect

JP4[2-3]

JP7[2-3]

JP8[1-2]

JP9[1-2]

External Battery

• Supply via the header connector, HD3

Connect

JP4[1-2]

JP7[don’t care]

JP8[1-2]

JP9[1-2]

Figure 4 shows the jumpers in the schematic, and Figure 5 shows the physical locations

of the jumpers and connectors on the adapter board.

Figure 4. Reference board supply source selection

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Figure 5. Jumper and connector locations

2.5 Antennas

The reference design module has an on-board PCB antenna and a W.FL RF

connector(P/N IPEX 20369-001E) for external antenna. If both antennas are used,

antenna diversity is supported.

Figure 6 shows the locations of PCB antenna and W.FL RF connector.

Figure 6. Reference design module antenna

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2.6 GPIO pins

Table 5 shows the available GPIO pins for both 88MW320 and 88MW322 reference

design modules.

Table 5. Available GPIO pins of the reference design modules

88MW320 88MW322

GPIO pin Up to 35 total

GPIO_0 to GPIO_10

GPIO_16

GPIO_22 to GPIO_33

GPIO_39 to GPIO_49

Up to 50 total

GPIO_0 to GPIO_49

Figure 7 shows the physical location of the GPIO pins on the adapter board.

Note: Each GPIO pin is labelled near the header connector as shown in Figure 7. The

reference designator, IO_26, is referred to GPIO[26], for example.

Figure 7. GPIO pin locations

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2.7 Configuration pins

By default the configuration pins Strap1 and Strap0 are disconnected, and the DUT is

configured to boot from Flash.

Configuration pins are muxed and used for the followings:

• During boot-up, their states are read for the device operating mode

• After boot-up, the pins can be repurposed for other GPIO functions. Strap1 is

GPIO[16], and Strap0 is GPIO[27]. Please refer to 88MW320-88MW322 datasheet.

Figure 8 shows the location of the configuration pins.

Figure 8. Configuration pin locations

Note: To use the configuration pin after boot-up there is a requirement if the

configuration pin is used as GPIO input pin. There is no requirement if the configuration

pin is used as output pin. The requirement is that the configuration pin cannot be driven

other than the intended operating mode. For example, if the configuration pin is set

to logic high at power up, this GPIO input must be driven logic high before reset is

deasserted; otherwise, the SoC will be configured to another operating mode.

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3 Getting started

This section describes the basic setup for the reference design module, and how to

launch the Labtool for manufacturing (MFG) test.

The test PC must be running on 64-bit Windows operating system.

3.1 Setup connection

Connect the DUT (reference design module + adapter board) as follows:

Step 1: Place the DUT in the RF Shield Box as shown in Figure 9 below.

Step 2: Connect the DUT RF connector to the RF Tester with a RF coaxial cable and a

10 dB attenuator in series.

Step 3: Connect a USB Type A to USB mini-B cable between the DUT Virtual UART

Connector, J3, and the Test PC.

Step 4: Connect the 5V AC adapter to the DUT DC jack, J2, if using an external supply.

We recommend to use an external supply for MFG test; this is to prevent inadvertent

over-current draw from Test PC, when USB Port 5V of Test PC supply source is

selected.

Step 5: Connect the Ethernet cable between the Test PC and RF Tester.

Figure 9. Reference design test setup

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3.2 Setup the virtual UART interface

The DUT can be accessed from the Test PC over the virtual UART interface. The Test

PC is required to install a driver for its USB serial port. Follow the steps below:

Step 1: Download the Zadig driver from https://zadig.akeo.ie/

Step 2: Install the Zadig driver on Test PC. Please see details in the section Install

WinUSB Driver of Wireless Microcontroller SDK Development Host Setup Guide.

Step 3: Once you have installed the driver, look for the USB serial port number in Device

Manager as shown in Figure 10.

Figure 10. USB serial port in Device Manager

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3.3 Test with Labtool

For MFG test using Labtool, follow the steps below.

Step 1: The evaluation kit needs to be configured to support MFG test mode. Read more

in the section Wi-Fi MFG firmware and bridge Setup of 88MW32x Labtool User Guide.

Step 2: Edit the setup.ini file located in Labtool application folder, so that its Serial COM

port number ComNo matches the USB Serial Port number displayed in Device Manager.

Step 3: Launch the Labtool application for testing purpose. Figure 11 shows the Labtool

start window. Read more in 88MW32x Labtool User Guide.

Figure 11. Labtool start window

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4 Legal information

4.1 Definitions

Draft — A draft status on a document indicates that the content is still

under internal review and subject to formal approval, which may result

in modifications or additions. NXP Semiconductors does not give any

representations or warranties as to the accuracy or completeness of

information included in a draft version of a document and shall have no

liability for the consequences of use of such information.

4.2 Disclaimers

Limited warranty and liability — Information in this document is believed

to be accurate and reliable. However, NXP Semiconductors does not

give any representations or warranties, expressed or implied, as to the

accuracy or completeness of such information and shall have no liability

for the consequences of use of such information. NXP Semiconductors

takes no responsibility for the content in this document if provided by an

information source outside of NXP Semiconductors. In no event shall NXP

Semiconductors be liable for any indirect, incidental, punitive, special or

consequential damages (including - without limitation - lost profits, lost

savings, business interruption, costs related to the removal or replacement

of any products or rework charges) whether or not such damages are based

on tort (including negligence), warranty, breach of contract or any other

legal theory. Notwithstanding any damages that customer might incur for

any reason whatsoever, NXP Semiconductors’ aggregate and cumulative

liability towards customer for the products described herein shall be limited

in accordance with the Terms and conditions of commercial sale of NXP

Semiconductors.

Right to make changes — NXP Semiconductors reserves the right to

make changes to information published in this document, including without

limitation specifications and product descriptions, at any time and without

notice. This document supersedes and replaces all information supplied prior

to the publication hereof.

Suitability for use — NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in life support, life-critical or

safety-critical systems or equipment, nor in applications where failure or

malfunction of an NXP Semiconductors product can reasonably be expected

to result in personal injury, death or severe property or environmental

damage. NXP Semiconductors and its suppliers accept no liability for

inclusion and/or use of NXP Semiconductors products in such equipment or

applications and therefore such inclusion and/or use is at the customer’s own

risk.

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes

no representation or warranty that such applications will be suitable

for the specified use without further testing or modification. Customers

are responsible for the design and operation of their applications and

products using NXP Semiconductors products, and NXP Semiconductors

accepts no liability for any assistance with applications or customer product

design. It is customer’s sole responsibility to determine whether the NXP

Semiconductors product is suitable and fit for the customer’s applications

and products planned, as well as for the planned application and use of

customer’s third party customer(s). Customers should provide appropriate

design and operating safeguards to minimize the risks associated with

their applications and products. NXP Semiconductors does not accept any

liability related to any default, damage, costs or problem which is based

on any weakness or default in the customer’s applications or products, or

the application or use by customer’s third party customer(s). Customer is

responsible for doing all necessary testing for the customer’s applications

and products using NXP Semiconductors products in order to avoid a

default of the applications and the products or of the application or use by

customer’s third party customer(s). NXP does not accept any liability in this

respect.

Export control — This document as well as the item(s) described herein

may be subject to export control regulations. Export might require a prior

authorization from competent authorities.

Evaluation products — This product is provided on an “as is” and “with all

faults” basis for evaluation purposes only. NXP Semiconductors, its affiliates

and their suppliers expressly disclaim all warranties, whether express,

implied or statutory, including but not limited to the implied warranties of

non-infringement, merchantability and fitness for a particular purpose. The

entire risk as to the quality, or arising out of the use or performance, of this

product remains with customer. In no event shall NXP Semiconductors, its

affiliates or their suppliers be liable to customer for any special, indirect,

consequential, punitive or incidental damages (including without limitation

damages for loss of business, business interruption, loss of use, loss of

data or information, and the like) arising out the use of or inability to use

the product, whether or not based on tort (including negligence), strict

liability, breach of contract, breach of warranty or any other theory, even if

advised of the possibility of such damages. Notwithstanding any damages

that customer might incur for any reason whatsoever (including without

limitation, all damages referenced above and all direct or general damages),

the entire liability of NXP Semiconductors, its affiliates and their suppliers

and customer’s exclusive remedy for all of the foregoing shall be limited to

actual damages incurred by customer based on reasonable reliance up to

the greater of the amount actually paid by customer for the product or five

dollars (US$5.00). The foregoing limitations, exclusions and disclaimers

shall apply to the maximum extent permitted by applicable law, even if any

remedy fails of its essential purpose.

Translations — A non-English (translated) version of a document is for

reference only. The English version shall prevail in case of any discrepancy

between the translated and English versions.

Security — While NXP Semiconductors has implemented advanced

security features, all products may be subject to unidentified vulnerabilities.

Customers are responsible for the design and operation of their applications

and products to reduce the effect of these vulnerabilities on customer’s

applications and products, and NXP Semiconductors accepts no liability for

any vulnerability that is discovered. Customers should implement appropriate

design and operating safeguards to minimize the risks associated with their

applications and products.

4.3 Trademarks

Notice: All referenced brands, product names, service names and

trademarks are the property of their respective owners.

NXP — wordmark and logo are trademarks of NXP B.V.

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Tables

Tab. 1. 88MW320 and 88MW322 key differences .........3

Tab. 2. Reference design key feature summary ............5

Tab. 3. Adapter board key feature summary ................. 6

Tab. 4. Power supply source selection and

configuration ......................................................7

Tab. 5. Available GPIO pins of the reference design

modules ............................................................. 9

Figures

Fig. 1. Reference design mounted on an adapter

board ................................................................. 4

Fig. 2. Reference design module block diagram .......... 5

Fig. 3. Adapter board block diagram ............................ 6

Fig. 4. Reference board supply source selection ......... 7

Fig. 5. Jumper and connector locations ....................... 8

Fig. 6. Reference design module antenna ................... 8

Fig. 7. GPIO pin locations ............................................ 9

Fig. 8. Configuration pin locations ..............................10

Fig. 9. Reference design test setup ........................... 11

Fig. 10. USB serial port in Device Manager ................. 12

Fig. 11. Labtool start window ....................................... 13

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88MW32X Reference Design User Guide

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section 'Legal information'.

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: [email protected]

Date of release: 4 August 2020

Contents

1 Introduction ......................................................... 3

1.1 Overview ............................................................3

1.2 Related documents ............................................3

2 Evaluation kit overview ...................................... 4

2.1 Kit package list .................................................. 4

2.2 Reference design module features ....................5

2.3 Adapter board ....................................................6

2.4 Power supply options ........................................ 7

2.5 Antennas ............................................................8

2.6 GPIO pins ..........................................................9

2.7 Configuration pins ............................................10

3 Getting started .................................................. 11

3.1 Setup connection .............................................11

3.2 Setup the virtual UART interface ..................... 12

3.3 Test with Labtool ............................................. 13

4 Legal information .............................................. 14

NXP 88MW32X 802.11n Wi-Fi® Microcontroller SoC User guide

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