MICROCHIP EV54Y39A User guide

PIC-IoT Wx Hardware User

Guide

PIC-IoT Wx Hardware User Guide

Preface

Important:  This document is applicable for two different products; PIC-IoT WG (AC164164) and PIC-IoT

WA (EV54Y39A). Both variants are referred to as PIC-IoT Wx in this document, and both products have
identical hardware. PIC-IoT WG is preconfigured to send data through Google Cloud IoT Core, and PIC­IoT WA is preconfigured to send data through Amazon Web Services (AWS). Both products can be
reconfigured to send data to different cloud providers.

Introduction

The PIC-IoT Wx development board is a small and easily expandable demonstration and development platform for
IoT solutions based on the PIC® microcontroller architecture using Wi-Fi® technology. It is designed to demonstrate
that the design of a typical IoT application can be simplified by partitioning the problem into three blocks:

• Smart - represented by the PIC24FJ128GA705 microcontroller

• Secure - represented by the ATECC608A secure element

• Connected - represented by the ATWINC1510 Wi-Fi controller module

The PIC-IoT Wx Development Board features the following elements:

• The on-board debugger (PKOB nano) supplies full programming and debugging support through MPLAB X IDE.
It also provides access to a serial port interface (serial to USB bridge) and one logic analyzer channel (debug
GPIO).

• The on-board debugger enumerates on the PC as a mass storage interface device for easy ‘drag and drop’
programming, Wi-Fi configuration, and full access to the microcontroller application Command Line Interface
(CLI)

• A mikroBUS™ socket allows for the ability to expand the board capabilities with the selection from 450+ sensors
and actuators options offered by MikroElektronika (www.mikroe.com) via a growing portfolio of Click boards

• A light sensor used to demonstrate published data

• Microchip MCP9808 high-accuracy temperature sensor used to demonstrate published data

• Microchip MCP73871 Li-Ion/LiPo battery charger with power path management

™

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PIC-IoT Wx Hardware User Guide

• MPLAB® X IDE - Software to discover, configure, develop, program, and debug Microchip microcontrollers.

• Application Code on GitHub - Get started with application code.

• PIC-IoT WG website - Find schematics, design files, and purchase the board. Set up for Google Cloud IoT
Core.

• PIC-IoT WA website - Find schematics, design files, and purchase the board. Set up for Amazon Web Services.

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PIC-IoT Wx Hardware User Guide

Table of Contents

Preface........................................................................................................................................................... 1

1. Introduction............................................................................................................................................. 5

1.1. Features....................................................................................................................................... 5

1.2. Kit Overview................................................................................................................................. 5

2. Getting Started........................................................................................................................................ 7

2.1. Quick Start....................................................................................................................................7

2.2. Design Documentation and Relevant Links................................................................................. 7

3. Application User Guide........................................................................................................................... 8

4. Hardware User Guide............................................................................................................................. 9

4.1. On-Board Debugger Overview..................................................................................................... 9

4.1.1. Debugger.......................................................................................................................9

4.1.2. Virtual Serial Port (CDC)................................................................................................9

4.1.3. Mass Storage Device...................................................................................................12

4.1.4. Data Gateway Interface (DGI)..................................................................................... 13

4.2. On-Board Debugger Connections.............................................................................................. 14

4.3. Power......................................................................................................................................... 15

4.3.1. Power Source.............................................................................................................. 15

4.3.2. Battery Charger........................................................................................................... 15

4.3.3. Hardware Modifications............................................................................................... 15

4.4. Peripherals................................................................................................................................. 16

4.4.1. PIC24FJ128GA705......................................................................................................16

4.4.2. mikroBUS™ Socket...................................................................................................... 16

4.4.3. WINC1510 Wi-Fi Module............................................................................................. 17

4.4.4. ATECC608A................................................................................................................ 18

4.4.5. Temperature Sensor.................................................................................................... 18

4.4.6. Light Sensor.................................................................................................................19

4.4.7. LED..............................................................................................................................19

4.4.8. Mechanical Buttons..................................................................................................... 19

5. Regulatory Approval..............................................................................................................................20

5.1. United States..............................................................................................................................20

5.2. Canada.......................................................................................................................................20

5.3. Taiwan........................................................................................................................................ 21

5.4. List of Antenna Types.................................................................................................................21

6. Hardware Revision History and Known Issues..................................................................................... 22

6.1. Identifying Product ID and Revision........................................................................................... 22

6.2. PIC-IoT WG................................................................................................................................22

6.2.1. Revision 3....................................................................................................................22

6.2.2. Revision 2....................................................................................................................22

6.3. PIC-IoT WA................................................................................................................................ 22

6.3.1. Revision 1....................................................................................................................22

7. Document Revision History...................................................................................................................23

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8. Appendix............................................................................................................................................... 24

8.1. Schematic...................................................................................................................................24

8.2. Assembly Drawing......................................................................................................................26

8.3. Mechanical Drawings................................................................................................................. 26

The Microchip Website.................................................................................................................................28

Product Change Notification Service............................................................................................................28

Customer Support........................................................................................................................................ 28

Microchip Devices Code Protection Feature................................................................................................ 28

Legal Notice................................................................................................................................................. 28

Trademarks.................................................................................................................................................. 29

Quality Management System....................................................................................................................... 29

Worldwide Sales and Service.......................................................................................................................30

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1. Introduction

1.1 Features

• PIC24FJ128GA705 Microcontroller

• ATWINC1510 Wi-Fi Module

• ATECC608A CryptoAuthentication™ Device

• Preconfigured for Microchip Accounts with Different Cloud Providers

– Google Cloud IoT Core
– Amazon Web Services (AWS)

• Four User LEDs

• Two Mechanical Buttons

• TEMT6000 Light Sensor

• MCP9808 Temperature Sensor

• mikroBUS Socket

• On-board Debugger

– Board identification in Microchip MPLAB X IDE
– One green board power and status LED
– Virtual serial port (USB CDC)
– One logic analyzer channel (debug GPIO)

• USB and Battery Powered

• MCP73871 Li-Ion/LiPo Battery Charger

• Fixed 3.3V

PIC-IoT Wx Hardware User Guide

Introduction

1.2 Kit Overview

The PIC-IoT Wx development board is a hardware platform to evaluate and develop IoT solutions with the Microchip
PIC24FJ128GA705 16-bit microcontroller, ATECC608A secure element, and WINC1510 Wi-Fi controller module.

The preprogrammed demo application publishes data from the on-board light and temperature sensor read by the
PIC24FJ128GA705 every second to the cloud. Any data received from the cloud over the subscribed topic is sent to
the virtual serial port and can be displayed in a serial terminal application. The WINC1510 needs a connection to a
Wi-Fi network with an internet connection. The ATECC608A is used to authenticate the hardware with the cloud to
uniquely identify every board. The demo application source code can be modified to publish data to a personal cloud
account to get started with a custom cloud application.

The figure below shows the main features and pinout of the board.

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Figure 1-1. PIC-IoT Wx Development Kit Overview

Time r/PWM

UART RX

RB14

RB15

RA0

RA1

RB0

RB1

3.3V

GND

SP I SCK

SP I MISO

SP I MOSI

RC6

RB7

RB6

RB5

RB8

RB9

5.0V

GND

UART TX

I2C SCL

I

2

C SDA

Wi-Fi Status LED

RC5

Conn ec tion S tatus LED

RC4

Data Trans fer LED

RC3

Error Status LED

RB4

RA10

USER SWITCH 1

RA7

USER SWITCH 0

ATWINC151 0 Wi-Fi®Mo dule

Mic ro US B Con nec tor

Po wer/S tatus LED

PKoB 4 na no Debu gg er/Prog ramme r

ADC AIN7

PIC24FJ12 8GA705 Microc ontroller

Charg e Status LEDs

LiPo Con ne cto r

MCP7 387 1 LiPo Charger

ATECC608A Se cu re Ele men t

Light Se ns or

MCP9 808 Tem peratu re S ens or

MIC3305 0 Voltag e Re gu lato r

SP I CS

Res et

Interrupt

PIC-Io T WG De ve lo pme nt Bo ard (AC164164)

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Introduction

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PIC-IoT Wx Hardware User Guide

2. Getting Started

2.1 Quick Start

Steps to start exploring the board:

1. Connect the board to your computer.

2. Open the “CLICK-ME.HTM” file on the “CURIOSITY” mass storage disk and follow the instructions.

2.1. Download the latest application .hex firmware.

2.2. Download the Wi-Fi configuration file "WIFI.cfg".

3. Drag and drop the application .hex file on the "CURIOSITY" drive.

4. Drag and drop the “WIFI.cfg” configuration file on the “CURIOSITY” drive.

The board will now connect to your Wi-Fi network and send data to the website opened in step 2 through a cloud
provider.

2.2 Design Documentation and Relevant Links

The following list contains links to the most relevant documents and software for the PIC-IoT Wx.

Getting Started

• PIC-IoT WG website - Find schematics, design files, and purchase the board. Set up for Google Cloud IoT
Core.

• PIC-IoT WG on microchipDIRECT - Purchase this board on Microchip Direct.

• PIC-IoT WA website - Find schematics, design files, and purchase the board. Set up for Amazon Web Services.

• PIC-IoT WA on microchipDIRECT - Purchase this board on Microchip Direct.

• MPLAB Data Visualizer - MPLAB Data Visualizer is a program used for processing and visualizing data. The
Data Visualizer can receive data from various sources such as serial ports and on-board debugger’s Data
Gateway Interface, as found on Curiosity Nano and Xplained Pro boards.

• MPLAB® X IDE - MPLAB X IDE is a software program that runs on a PC (Windows®, Mac OS®, Linux®) to
develop applications for Microchip microcontrollers and digital signal controllers. It is called an Integrated
Development Environment (IDE) because it provides a single integrated “environment” to develop code for
embedded microcontrollers.

• Microchip Sample Store - Microchip sample store where you can order samples of devices.

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3. Application User Guide

The PIC24FJ128GA705 mounted on PIC-IoT Wx is preprogrammed with an application ready to publish data to a
Microchip account with a cloud provider, and subscribe to data sent from https://pic-iot.com through the cloud
provider. PIC-IoT WA is preconfigured for Amazon Web Services (AWS), and PIC-IoT WG is preconfigured for
Google Cloud IoT Core. The data is read from the cloud and presented to the user on https://pic-iot.com.

PIC-IoT WA

The application publishes data through Amazon Web Services, and the firmware is available on GitHub: https://

github.com/microchip-pic-avr-solutions/pic-iot-aws-sensor-node.

PIC-IoT WG

The application publishes data through Google Cloud IoT Core. For in-depth information about the preprogrammed
demo application and how to develop your application, see the full PIC-IoT WG Application User Guide: https://

www.microchip.com/mymicrochip/filehandler.aspx?ddocname=en609711.

Setup for Different Cloud Accounts

Any PIC-IoT Wx kit can be reprovisioned to publish data to either Microchips sandbox account at Amazon Web
Services, Microchips sandbox account at Google Cloud IoT Core, or to a personal account.

Download the IoT Provisioning Tool package, compatible with Windows, Mac and Linux to get started: https://

www.microchip.com/mymicrochip/filehandler.aspx?ddocname=en1001525.

PIC-IoT Wx Hardware User Guide

Application User Guide

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4. Hardware User Guide

4.1 On-Board Debugger Overview

PIC-IoT Wx contains an on-board debugger for programming and debugging. The on-board debugger is a composite
USB device consisting of several interfaces:

• A debugger that can program and debug the PIC24FJ128GA705 in MPLAB X IDE

• A mass storage device that allows drag-and-drop programming of the PIC24FJ128GA705

• A virtual serial port (CDC) that is connected to a Universal Asynchronous Receiver/Transmitter (UART) on the
PIC24FJ128GA705, and provides an easy way to communicate with the target application through terminal
software

• A Data Gateway Interface (DGI) for code instrumentation with logic analyzer channels (debug GPIO) to visualize
program flow

The on-board debugger controls a Power and Status LED (marked PS) on the PIC-IoT Wx Board. The table below
shows how the LED is controlled in different operation modes.

Table 4-1. On-Board Debugger LED Control

Operation Mode Power and Status LED

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Boot Loader mode The LED blinks slowly during power-up

Power-up The LED is ON

Normal operation The LED is ON

Programming Activity indicator: The LED blinks slowly during programming/debugging

Drag-and-drop
programming

Fault The LED blinks rapidly if a power Fault is detected

Sleep/Off The LED is OFF. The on-board debugger is either in a sleep mode or powered down.

4.1.1 Debugger

The on-board debugger on the PIC-IoT Wx Board appears as a Human Interface Device (HID) on the host
computer’s USB subsystem. The debugger supports full-featured programming and debugging of the
PIC24FJ128GA705 using MPLAB X IDE.

Success: The LED blinks slowly for 2 sec.

Failure: The LED blinks rapidly for 2 sec.

This can occur if the board is externally powered.

Info:  Slow blinking is approximately 1 Hz, and rapid blinking is approximately 5 Hz.

Remember:  Keep the debugger’s firmware up-to-date. Firmware upgrades are done automatically when

using MPLAB X IDE.

4.1.2 Virtual Serial Port (CDC)

The virtual serial port (CDC) is a general purpose serial bridge between a host PC and a target device.

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4.1.2.1 Overview

Target MCU

UART TX

UART RX

Debugger

USB

CDC RX

CDC TX

PC

Terminal

Software

Target

Receive

Target

Send

Terminal
Receive

Terminal

Send

The on-board debugger implements a composite USB device that includes a standard Communications Device Class
(CDC) interface, which appears on the host as a virtual serial port. The CDC can be used to stream arbitrary data in
both directions between the host computer and the target: All characters sent through the virtual serial port on the
host computer will be transmitted as UART on the debugger’s CDC TX pin, and UART characters captured on the
debugger’s CDC RX pin will be returned to the host computer through the virtual serial port.

Figure 4-1. CDC Connection

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Info:  As shown in Figure 4-1, the debugger’s CDC TX pin is connected to a UART RX pin on the target

for receiving characters from the host computer. Similarly, the debugger’s CDC RX pin is connected to a
UART TX pin on the target for transmitting characters to the host computer.

4.1.2.2 Operating System Support

On Windows machines, the CDC will enumerate as Curiosity Virtual COM Port and appear in the Ports section of the
Windows Device Manager. The COM port number can also be found there.

Info:  On older Windows systems, a USB driver is required for CDC. This driver is included in installations
of MPLAB X IDE.

On Linux machines, the CDC will enumerate and appear as /dev/ttyACM#.

Info:  tty* devices belong to the “dialout” group in Linux, so it may be necessary to become a member of
that group to have permissions to access the CDC.

On MAC machines, the CDC will enumerate and appear as /dev/tty.usbmodem#. Depending on which terminal
program is used, it will appear in the available list of modems as usbmodem#.

Info:  For all operating systems: Be sure to use a terminal emulator that supports DTR signaling. See
Section 3.1.2.4 “Signaling”.

4.1.2.3 Limitations

Not all UART features are implemented in the on-board debugger CDC. The constraints are outlined here:

• Baud rate: Must be in the range of 1200 bps to 500 kbps. Any baud rate outside this range will be set to the
closest limit, without warning. Baud rate can be changed on-the-fly.

• Character format: Only 8-bit characters are supported.

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• Parity: Can be odd, even, or none.

• Hardware flow control: Not supported.

• Stop bits: One or two bits are supported.

4.1.2.4 Signaling

During USB enumeration, the host OS will start both communication and data pipes of the CDC interface. At this
point, it is possible to set and read back the baud rate and other UART parameters of the CDC, but data sending and
receiving will not be enabled.

When a terminal connects on the host, it must assert the DTR signal. As this is a virtual control signal implemented
on the USB interface, it is not physically present on the board. Asserting the DTR signal from the host will indicate to
the on-board debugger that a CDC session is active. The debugger will then enable its level shifters (if available), and
start the CDC data send and receive mechanisms.

Deasserting the DTR signal will not disable the level shifters but will disable the receiver so no further data will be
streamed to the host. Data packets that are already queued up for sending to the target will continue to be sent out,
but no further data will be accepted.

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Remember:  Set up the terminal emulator to assert the DTR signal. Without the signal, the on-board

debugger will not send or receive any data through its UART.

Tip:  The on-board debugger’s CDC TX pin will not be driven until the CDC interface is enabled by the
host computer. Also, there are no external pull-up resistors on the CDC lines connecting the debugger and
the target, which means that during power-up, these lines are floating. To avoid any glitches resulting in
unpredictable behavior like framing errors, the target device should enable the internal pull-up resistor on
the pin connected to the debugger’s CDC TX pin.

4.1.2.5 Advanced Use

CDC Override Mode

In normal operation, the on-board debugger is a true UART bridge between the host and the device. However, in
certain use cases, the on-board debugger can override the basic operating mode and use the CDC TX and RX pins
for other purposes.

Dropping a text file into the on-board debugger’s mass storage drive can be used to send characters out of the
debugger’s CDC TX pin. The filename and extension are trivial, but the text file must start with the characters:

CMD:SEND_UART=

The maximum message length is 50 characters – all remaining data in the frame are ignored.

The default baud rate used in this mode is 9600 bps, but if the CDC is already active or has been configured, the
previously used baud rate still applies.

USB-Level Framing Considerations

Sending data from the host to the CDC can be done byte-wise or in blocks, which will be chunked into 64-byte USB
frames. Each such frame will be queued up for sending to the debugger’s CDC TX pin. Transferring a small amount
of data per frame can be inefficient, particularly at low baud rates, because the on-board debugger buffers frames
and not bytes. A maximum of four 64-byte frames can be active at any time. The on-board debugger will throttle the
incoming frames accordingly. Sending full 64-byte frames containing data is the most efficient method.

When receiving data on the debugger’s CDC RX pin, the on-board debugger will queue up the incoming bytes into
64-byte frames, which are sent to the USB queue for transmission to the host when they are full. Incomplete frames
are also pushed to the USB queue at approximately 100 ms intervals, triggered by USB start-of-frame tokens. Up to
eight 64-byte frames can be active at any time.

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If the host (or the software running on it) fails to receive data fast enough, an overrun will occur. When this happens,
the last-filled buffer frame will be recycled instead of being sent to the USB queue, and a full frame of data will be
lost. To prevent this occurrence, the user must ensure that the CDC data pipe is being read continuously, or the
incoming data rate must be reduced.

4.1.3 Mass Storage Device

The on-board debugger includes a simple Mass Storage Device implementation, which is accessible for read/write
operations via the host operating system to which it is connected.

It provides:

• Read access to basic text and HTML files for detailed kit information and support

• Write access for programming Intel® HEX formatted files into the target device’s memory

• Write access for simple text files for utility purposes

4.1.3.1 Mass Storage Device Implementation

The on-board debugger implements a highly optimized variant of the FAT12 file system that has several limitations,
partly due to the nature of FAT12 itself and optimizations made to fulfill its purpose for its embedded application.

The Curiosity Nano USB Device is USB Chapter 9-compliant as a mass storage device but does not, in any way,
fulfill the expectations of a general purpose mass storage device. This behavior is intentional.

When using the Windows operating system, the on-board debugger enumerates as a Curiosity Nano USB Device
that can be found in the disk drives section of the device manager. The CURIOSITY drive appears in the file manager
and claims the next available drive letter in the system.

The CURIOSITY drive contains approximately one MB of free space. This does not reflect the size of the target
device’s Flash in any way. When programming an Intel® HEX file, the binary data are encoded in ASCII with
metadata providing a large overhead, so one MB is a trivially chosen value for disk size.

It is not possible to format the CURIOSITY drive. When programming a file to the target, the filename may appear in
the disk directory listing. This is merely the operating system’s view of the directory, which, in reality, has not been
updated. It is not possible to read out the file contents. Removing and replugging the board will return the file system
to its original state, but the target will still contain the application that has been previously programmed.

To erase the target device, copy a text file starting with “CMD:ERASE” onto the disk.

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By default, the CURIOSITY drive contains several read-only files for generating icons as well as reporting status and
linking to further information:

• AUTORUN.ICO – icon file for the Microchip logo

• AUTORUN.INF – system file required for Windows Explorer to show the icon file

• CLICK-ME.HTM – redirect to the PIC-IoT Wx web demo application

• KIT-INFO.HTM – redirect to the development board website

• KIT-INFO.TXT – a text file containing details about the board’s debugger firmware version, board name, USB
serial number, device, and drag-and-drop support

• PUBKEY.TXT – a text file containing the public key for data encryption

• STATUS.TXT – a text file containing the programming status of the board

Info:  STATUS.TXT is dynamically updated by the on-board debugger. The contents may be cached by
the OS and, therefore, do not reflect the correct status.

4.1.3.2 Configuration Words

Configuration Words (PIC® MCU Targets)

Configuration Word settings included in the project being programmed after program Flash is programmed. The
debugger will not mask out any bits in the Configuration Words when writing them, but since it uses Low-Voltage
Programming mode, it is unable to clear the LVP Configuration bit. If the incorrect clock source is selected, for

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example, and the board does not boot, it is always possible to perform a bulk erase (always done before
programming) and restore the device to its default settings.

4.1.3.3 Special Commands

Several utility commands are supported by copying text files to the mass storage disk. The filename or extension is
irrelevant – the command handler reacts to content only.

Table 4-2. Special File Commands

Command Content Description

CMD:ERASE

CMD:SEND_UART=

CMD:RESET

Info:  The commands listed here are triggered by the content being sent to the mass storage emulated
disk, and no feedback is provided in the case of either success or failure.

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Executes a chip erase of the target

Sends a string of characters to the CDC UART. See “CDC Override Mode”.

Resets the target device by entering Programming mode and then exiting
Programming mode immediately thereafter. Exact timing can vary according to
the programming interface of the target device. (Debugger firmware v1.16 or
newer.)

4.1.4 Data Gateway Interface (DGI)

Data Gateway Interface (DGI) is a USB interface for transporting raw and time-stamped data between on-board
debuggers and host computer-based visualization tools. MPLAB Data Visualizer is used on the host computer to
display debug GPIO data. It is available as a plug-in for MPLAB® X IDE or a stand-alone application that can be used
in parallel with MPLAB X IDE.

Although DGI encompasses several physical data interfaces, the PIC-IoT Wx implementation includes logic analyzer
channels:

• One debug GPIO channel (also known as DGI GPIO)

4.1.4.1 Debug GPIO

Debug GPIO channels are timestamped digital signal lines connecting the target application to a host computer
visualization application. They are typically used to plot the occurrence of low-frequency events on a time-axis – for
example, when certain application state transitions occur.

The figure below shows the monitoring of the digital state of a mechanical switch connected to a debug GPIO in
MPLAB Data Visualizer.

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Figure 4-2. Monitoring Debug GPIO with MPLAB Data Visualizer

Debug GPIO channels are timestamped, so the resolution of DGI GPIO events is determined by the resolution of the
DGI timestamp module.

Important:  Although bursts of higher-frequency signals can be captured, the useful frequency range of
signals for which debug GPIO can be used is up to about 2 kHz. Attempting to capture signals above this
frequency will result in data saturation and overflow, which may cause the DGI session to be aborted.

4.1.4.2 Timestamping

DGI sources are timestamped as they are captured by the debugger. The timestamp counter implemented in the
Curiosity Nano debugger increments at 2 MHz frequency, providing a timestamp resolution of a half microsecond.

4.2 On-Board Debugger Connections

The table below shows the connections between the target and the debugger section. All connections between the
target and the debugger are tri-stated as long as the debugger is not actively using the interface. Hence, since there
are little contaminations of the signals, the pins can be configured to anything the user wants.

For further information on how to use the capabilities of the on-board debugger, see 4.1 On-Board Debugger

Overview.

Table 4-3. Debugger Connections

Debugger Pin PIC24FJ128GA705 Pin Function Shared Functionality

DBG0 ICSPDAT Program/Debug Data —

DBG1 ICSPCLK Program/Debug Clock —

DBG2 RA11 DGI GPIO0 —

DBG3 MCLR RESET —

CDC TX RC9 UART RX —

CDC RX RC8 UART TX —

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4.3 Power

USB

Debugger

Power source

Cut strap

Power consumer

Power converter

VUSB

MIC33050

(buck)

MCP73871

Li-Ion / Li-Po

battery

charger

Battery Charger

Battery

Connector

(JST)

VCC_P3V3

VBAT

VMUX

cut-strap

Peripherals

mBUS

WINC1510

PIC24FJ128

GA705

cut-strap

WARNING

4.3.1 Power Source

The board can be powered through the USB port or by a Li-Ion/LiPo battery. The kit contains one buck converter for
generating 3.3V for the debugger, target, and peripherals.

The maximum available current from the USB is limited to 500 mA. The current will be shared between charging the
battery (if connected) and the target application section.

Figure 4-3. Power Supply Block Diagram

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4.3.2 Battery Charger

PIC-IoT Wx features an MCP73871 Li-Ion/LiPo charger and JST battery connector on board. The charger is
configured to limit the charge current to 100 mA to prevent the overcharging of small capacity batteries. Minimum
recommended battery capacity is 400 mAh.

Table 4-4. Charger Status LEDs

LEDs Function

Red (charging) The battery is being charged by the USB

Red (discharging) The battery voltage is low. Triggers if the voltage is under 3.1V.

Green Charge complete

Red and Green Timer Fault. The six-hour charge cycle has timed out before the complete

4.3.3 Hardware Modifications

On the bottom side of the PIC-IoT Wx board, there are two cut-straps as shown in the figure below. These are
intended for current measurement purposes. Do not leave these unconnected as the microcontrollers might get
powered through the I/O’s.

© 2020 Microchip Technology Inc.

The MCP73871 has a battery charge voltage of 4.2V. Make sure your battery has the same charge
voltage.

charge.

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Hardware User Guide

Figure 4-4. V

The 5V supply to the mikroBUS socket is connected by default. To remove 5V from the socket, desolder the 0-ohm
resistor (0402) below the 5V text, as shown in the figure below.

Figure 4-5. mikroBUS™ 5V Footprint

CC

4.4 Peripherals

Cut-Straps

4.4.1 PIC24FJ128GA705

Microchip’s PIC24FJ128GA705 features 128KB of ECC Flash, 16KB of RAM, and eXtreme Low Power (XLP) with 16
MIPS performance. It has 12-bit ADC at 200ksps with 14 analog inputs, and a robust set of digital communications
and timer with peripheral pin select. Within the same family, there are variants with 64KB or 256KB Flash for
applications that require more or less memory. The PIC24FJ128GA705 is available in a 48-pin package, while other
variants are available in 28-pin and 44-pin packages. The PIC24F family is ideally suited for low power IoT sensor
node applications.

4.4.2 mikroBUS™ Socket

PIC-IoT Wx features a mikroBUS Socket footprint for expanding the functionality of the development kit using
MikroElektronika Click Boards and other mikroBUS add-on boards. The socket is populated with two 1x8 2.54 mm
pitch female headers and is ready to mount add-on boards.

Table 4-5. mikroBUS™ Socket Pinout

mikroBUS™ Socket Pin PIC24FJ128GA705 Pin Function Shared Functionality

AN RB14 AN6 —

RST RB15 GPIO —

CS RA0 SPI2 SS —

SCK RA1 SPI2 SCK —

MISO RB0 SPI2 MISO —

MOSI RB1 SPI2 MOSI —

+3.3V V

DD

VCC_TARGET, 3.3V
supply

—

GND GND Ground —

PWM RC6 MCCP —

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 16

PIC-IoT Wx Hardware User Guide

Hardware User Guide

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

mikroBUS™ Socket Pin PIC24FJ128GA705 Pin Function Shared Functionality

INT RB7 GPIO —

RX RB6 UART2 RX —

TX RB5 UART2 TX —

SCL RB8 I2C SCL1 —

SDA RB9 I2C SDA1 —

+5V — VCC_MUX1, MCP73871

GND GND Ground —

Info: 

1) A 0-ohm resistor has been soldered to connect the VCC_MUX pin to the mikroBUS socket. If an add-on
module cannot handle 5V on this pin, the 0-ohm resistor has to be removed. For more information, see

4.3.3 Hardware Modifications.

4.4.3 WINC1510 Wi-Fi Module

Microchip's WINC1510 is a low-power consumption 802.11 b/g/n IoT module, specifically optimized for low-power IoT
applications. The module integrates Power Amplifier (PA), Low-Noise Amplifier (LNA), switch, power management,
and a printed antenna or a micro co-ax (U.FL) connector for an external antenna resulting in a small form factor
(21.7x14.7x 2.1 mm) design. It is interoperable with various vendors’ 802.11 b/g/n access points. This module
provides SPI ports to interface with a host controller.

WINC1510 provides internal Flash memory as well as multiple peripheral interfaces, including UART and SPI. The
only external clock source needed for WINC1510 is the built-in, high-speed crystal or oscillator (26 MHz). WINC1510
is available in a QFN package or as a certified module.

The communication interface between the PIC24FJ128GA705 and the WINC1510 Wi-Fi module is SPI, together with
some enable signals and interrupt. The rest of the connections are left unconnected.

Table 4-6. WINC1510 Connections

—

output

WIN1510 Pin PIC24FJ128GA705 Pin Function Shared Functionality

4 RESET_N RA2 GPIO —

9 GND GND Ground —

10 SPI_CFG VCC_TARGET — —

11 WAKE RA8 GPIO —

12 GND GND Ground —

13 IRQN RA12 EXT INT —

15 SPI_MOSI RC0 SPI1 MOSI —

16 SPI_SSN RC1 SPI1 SS —

17 SPI_MISO RA13 SPI1 MISO —

18 SPI_SCK RC2 SPI1 SCK —

20 VBAT VCC_TARGET 3.3V supply —

22 CHIP_EN RA3 GPIO —

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 17

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

WIN1510 Pin PIC24FJ128GA705 Pin Function Shared Functionality

23 VDDIO VCC_TARGET 3.3V supply —

28 GND GND Ground —

29 PADDLE GND — —

4.4.4 ATECC608A

The ATECC608A is a secure element from the Microchip CryptoAuthentication portfolio with advanced Elliptic Curve
Cryptography (ECC) capabilities. With ECDH and ECDSA being built right in, this device is ideal for the rapidly
growing Internet of Things (IoT) market by easily supplying the full range of security, such as confidentiality, data
integrity, and authentication to systems with MCU or MPUs running encryption/decryption algorithms. Similar to all
Microchip CryptoAuthentication products, the new ATECC608A employs ultra-secure, hardware-based cryptographic
key storage and cryptographic countermeasures that eliminate any potential backdoors linked to software
weaknesses.

ATECC608A CryptoAuthentication device on the PIC-IoT Wx board is used to authenticate the hardware with cloud
providers to uniquely identify every board.

Note:  7-bit I2C address: 0x58.

Table 4-7. ATECC608A Connections

PIC-IoT Wx Hardware User Guide

Hardware User Guide

ATECC608A Pin PIC24FJ128GA7

05 Pin

SDA RB2 I2C SDA2 MCP9808

SCL RB3 I2C SCL2 MCP9808

4.4.5 Temperature Sensor

The MCP9808 digital temperature sensor converts temperatures between -20°C and +100°C to a digital word with
±0.25°C/±0.5°C (typical/maximum) accuracy.

Additional features:

• Accuracy:

– ±0.25°C (typical) from -40°C to +125°C
– ±0.5°C (maximum) from -20°C to +100°C

• User Selectable Measurement Resolution:

– 0.5°C, 0.25°C, 0.125°C, 0.0625°C

• User Programmable Temperature Limits:

– Temperature Window Limit
– Critical Temperature Limit

• User Programmable Temperature Alert Output

• Operating Voltage Range:

– 2.7V to 5.5V

• Operating Current:

– 200 μA (typical)

• Shutdown Current:

– 0.1 μA (typical)

The MCP9808 temperature sensor is connected to the PIC24FJ128GA705 through I2C and a GPIO for the user­configurable alert output.

Note:  7-bit I2C address: 0x18.

Function Shared Functionality

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 18

Table 4-8. MCP9808

PIC-IoT Wx Hardware User Guide

Hardware User Guide

MCP9808 Pin PIC24FJ128GA7

SDA RB2 I2C SDA2 ATECC608A

SCL RB3 I2C SCL2 ATECC608A

Alert RB13 External Interrupt —

4.4.6 Light Sensor

A TEMT6000X01 light sensor is mounted on the PIC-IoT Wx board for measuring the light intensity. The sensor is a
current source that will induce a voltage across the series resistor, which in turn can be measured by the
PIC24FJ128GA705 ADC. The current is exponentially relative to illuminance, from about 10 µA@20lx to 50
µA@100lx. The series resistor has a value of 10 kΩ.

Table 4-9. Light Sensor Connection

PIC24FJ128GA705
Pin

RB12 ADC AN8 —

4.4.7 LED

There are four LEDs available on the PIC-IoT Wx board that can be controlled with PWM or GPIO. The LEDs can be
activated by driving the connected I/O line to GND.

Table 4-10. LED Connections

PIC24FJ128GA705
Pin

Function Shared Functionality

05 Pin

Function Shared Functionality

Function Description

RB4 OCM2A Red LED

RC3 OCM2B Yellow LED

RC4 OCM3A Green LED

RC5 OCM3B Blue LED

4.4.8 Mechanical Buttons

PIC-IoT Wx contains two mechanical buttons. These are generic user-configurable buttons. When a button is
pressed, it will drive the connected I/O line to ground (GND).

Info:  There are no pull-up resistors connected to the generic user buttons. Remember to enable the
internal pull-up in the PIC24FJ128GA705 to use the buttons.

Table 4-11. Mechanical Button

PIC24FJ128GA705
Pin

RA7 User switch 0 (SW0) —

RA10 User switch 1 (SW1) —

Description Shared Functionality

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 19

5. Regulatory Approval

The PIC-IoT Wx development board has been testedby the following standards:

Emission:

• FCC Part 15 subpart B:2018 (Class B)

• EN55032:2015 (Class B)

Immunity:

• EN55024:2010+A1:2015

• EN61000-4-2:2009 (contact: level 2 (±4 kV), air: level3 (±8 kV))

• EN61000-4-3:2006+A2:2010 (80 - 1000 MHz, level 2 (3 V/M))

• EN61000-4-8:2010 (level 2 (3 A/m), continuous field)

The development board contains the wireless transmitter module ATWINC1510-MR210PB, which has the following
approval and/or registrations:

• United States/FCC ID: 2ADHKATWINC1510

• Canada

– IC: 20266-ATWINC1510
– HVIN: ATWINC1510-MR210PB
– PMN: ATWINC1510-MR210PB

• Europe - CE

• Japan/MIC: 005-101762

• Korea/KCC: R-CRM-mcp-WINC1510MR210P

• Taiwan/NCC: CCAN18LP0320T0

• China/SRRC: CMIIT ID: 2018DJ1310

PIC-IoT Wx Hardware User Guide

Regulatory Approval

5.1 United States

Contains Transmitter Module FCC ID: 2ADHKATWINC1510.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy, and if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna

• Increase the separation between the equipment and receiver

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected

• Consult the dealer or an experienced radio/TV technician for help

5.2 Canada

Contains IC: 20266-ATWINC1510.

This device complies with Industry Canada's license-exempt RSS standard(s). Operation is subject to the following
two conditions:

(1) This device may not cause interference, and

(2) This device must accept any interference, including interference that may cause undesired operation of the
device.

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 20

Le présent appareil est conforme aux CNR d'Industrie 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, et

(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible
d'en compromettre le fonctionnement.

Guidelines on Transmitter Antenna for License Exempt Radio Apparatus:

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum
(or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users,
the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not
more than that necessary for successful communication.

Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne
d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire
les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son
gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à
l'établisse-ment d'une communication satisfaisante.

5.3 Taiwan

Contains module: CCAN18LP0320T0.

注意 !

依據 低功率電波輻射性電機管理辦法

第十二條 經型式認證合格之低功率射頻電機，非經許 可， 公司、商號或使用者均不得擅自變更頻率、加大功率或 變
更原設計 之特性及功能。

第十四條 低功率射頻電機之使用不得影響飛航安全及 干擾合法通信； 經發現有干擾現象時，應立即停用，並改善至無
干擾時 方得繼續使用。

前項合法通信，指依電信規定作業之無線電信。

低功率射頻電機須忍受合法通信或工業、科學及醫療用 電波輻射性 電機設備之干擾。

PIC-IoT Wx Hardware User Guide

Regulatory Approval

5.4 List of Antenna Types

ATWINC1510-MR210 does not allow the use of external antennas and is tested with the PCB antenna on the
module.

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 21

PIC-IoT Wx Hardware User Guide

Hardware Revision History and Known Issues

6. Hardware Revision History and Known Issues

This user guide is written to provide information about the latest available revision of the board. The following
sections contain information about known issues, a revision history of older revisions, and how older revisions differ
from the latest revision.

6.1 Identifying Product ID and Revision

The revision and product identifier of the PIC-IoT Wx board can be found in two ways: Either by utilizing the MPLAB
X IDE Kit Window or by looking at the sticker on the bottom side of the PCB.

By connecting a PIC-IoT Wx to a computer with MPLAB X IDE running, the Kit Window will pop up. The first six digits
of the serial number, which is listed under kit information, contain the product identifier and revision.

Tip:  The Kit Window can be opened in MPLAB® X IDE through the menu bar Window > Kit Window.

The same information can be found on the sticker on the bottom side of the PCB. Most boards will have the identifier
and revision printed in plain text as A09-nnnn\rr, where “nnnn” is the identifier, and “rr” is the revision. Boards with
limited space have a sticker with only a data matrix code, containing the product identifier, revision, and serial
number.

The serial number string has the following format:

"nnnnrrssssssssss"

n = product identifier

r = revision

s = serial number

The product identifier for PIC-IoT WG is A09-3261.

The product identifier for PIC-IoT WA is A09-3352.

6.2 PIC-IoT WG

6.2.1 Revision 3

Revision 3 of PIC-IoT WG has 5V applied to the mikroBUS socket by default (R204 is populated). It is otherwise
identical to revision 2.

6.2.2 Revision 2

Revision 2 of PIC-IoT WG is the initial released revision. R204, the 0-ohm resistor that applies 5V to mikroBUS
socket, is not populated on this revision.

6.3 PIC-IoT WA

6.3.1 Revision 1

Revision 1 of PIC-IoT WA is the initial released revision. The hardware is identical to PIC-IoT WG revision 3.

Reconfiguration of Wi-Fi credentials does not work with the application firmware preprogrammed on this revision of
the kit. Follow the instructions in 2.1 Quick Start to download and upgrade the application firmware.

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 22

7. Document Revision History

Doc. rev. Date Comment

A 03/2020 Initial document release.

PIC-IoT Wx Hardware User Guide

Document Revision History

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 23

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Sheet Title

Target MCU

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A08-2993 1

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100n

C204

GND

VCC_TARGET

GND

100n

C200

1k

R213

USER LE DS

VCC_TARGET

RA7_SW0

USER BUTT ONS

330R

R207

PIC24FJ128GA705

DBG0

CDC_UART

TX

RX

UART

DBG1

DBG2

2185-108SS0CYNP1

1234567

8

J201

2185-108SS0CYNP1

1234567

8

J202

mikr oBUS

GND GND

AN

RSTCSSCK

MISO

MOSI

+3.3V

GND

PWM

INT

RXTXSCL

SDA

+5V

GND

Head er (Fema le)

TM

WINC1510

10uF

C203

10nF

C202

1 2

43

5

KMR221G

SW200

330R

R208

1 2

43

5

KMR221G

SW201

1k

R212

1k

R209

1k

R206

GND

SDA

5

SCL

6

GND

4

VCC8PAD

9

NC1NC2NC3NC

7

U202

GND

GND

100k

R200

RC1_SPI_SS

VCC_TARGET

VCC_TARGET

RB8_I2C1_SCL

RB9_I2C1_SDA

VCC_TARGET

GND

100n

C205

RB0_SPI_MISO

RA1_SPI_SCK

RB1_SPI_MOSI

RA10_SW1

GND

Cr yptoAuth enticat ionTM Temperat ure Sensor

GND

VCC_TARGET

100k

R211

VCC_TARGET

4.7k
R202

4.7k
R203

VCC_TARGET

VCC_TARGET

TP202

TP204

TP205

TP206

TP203

2 1

GREEN LED

SML-P12MTT86R

D201

RED LED

SML-P12VTT86R

2 1

D200

I2C address: 0x18

WINC_UART_RX

WINC_UART_TX

RC6_OCMxn_PWM

RA2_WINC_RST

RB15_MBUS_RST

RA8_WINC_WAKE

RA3_WINC_EN

WINC_SPI_CFG

RB3_I2C2_SCL

RB2_I2C2_SDA

RB14_MBUS_AIN

RB7_MBUS_INT

RB13_TEMP_INT

VCC_P1V3

2 1

YELLOW LED

SML-P12YTT86R

D203

Default I2C address: 0x58

2 1

BLUE LED

SMLP13BC8TT86

D202

VCC_TARGET

VCC_TARGET

12

TEMT6000

Q200

GND

VCC_TARGET

SDA

1

SCL2ALERT3GND

4

A25A16A0

7

VDD

8

EP

9

MCP9808U203

GND

RB5_UART2_TX

RB6_UART2_RXRA0_SPI_CS

Light Sensor

RB12_LIGHT_SENS

TP201

TP200

10k

R210

100n

C206

SW1

SW0

100k
R201

GND

VCC_MUX0R

R204

+5V

TP207

TP208

TP209 GND

GND

RB10_ICSPDAT

RB11_ICSPCLK

MCLR

ERR

DATA

CONN

WIFI

ATECC608A

ATWINC1510-MR210PB1961

RESET_N

4

CHIP_EN

22

VDDIO

23

VBAT

20

WAKE11UART_TXD14UART_RXD

19

NC

7

1P3V_TP

24

SPI_SCK18SPI_MISO17SPI_MOSI15SPI_SSN

16

SPI_CFG

10

GPIO_6

1

GPIO_5

27

GPIO_4

26

GPIO_3

25

I2C_SCL

2

I2C_SDA

3

GPIO_1/RTC

21

NC5NC6NC

8

IRQN

13

GND

28

GND

12

GND

9

PADDLE

29

U200

DBG3

RA13_SPI_MISO

RC2_SPI_SCK

RC0_SPI_MOSI

RB3_I2C2_SCL

RB2_I2C2_SDA

RA11_DGI_DBG2

4.7k
R215

4.7k

R216

VCC_TARGET

4.7k

R214

4.7k
R205

GND

VCC_TARGET

100n

C208

GND VCC_TARGET

RB10_ICSPDAT

RB11_ICSPCLK

MCLR

GND

RB3_I2C2_SCL
RB2_I2C2_SDA

RB9_I2C1_SDA

RB8_I2C1_SCL

VCAP

RB91RC62RC73RC84RC95VSS6VCAP7RA118RB10/PGD2

9

RB11/PGC210RB1211RB13

12

RA10

13

RA7

14

RB14

15

RB15

16

AVSS

17

AVDD

18

MCLR

19

RA12

20

RA0

21

RA1

22

RB0/PGD1

23

RB1/PGC1

24

RB225RB326RC027RC128RC229VDD30VSS

31

RA13

32

OSCI/RA233OSCO/RA3

34

RA8

35

SOSCI/RB4

36

RA4

37

RA9

38

RC3

39

RC4

40

RC5

41

VSS

42

VDD

43

RA14

44

PGD3/RB5

45

PGC3/RB6

46

RB7

47

RB8

48

EP

49

PIC24FJ128GA705T-I/M4

U201

RC0_SPI_MOSI

RB14_MBUS_AIN

RB15_MBUS_RST

RB12_LIGHT_SENS

RC1_SPI_SS

RB6_UART2_RX

RB5_UART2_TX

RB7_MBUS_INT

RA13_SPI_MISO

RC2_SPI_SCK

RA3_WINC_EN

RA8_WINC_WAKE

RA2_WINC_RST

RB4_OCMxn_ERROR

RC4_OCMxn_CONN

RC5_OCMxn_WIFI

RC3_OCMxn_DATA

RA12_WINC_INT

RC8_CDC_TX

RB13_TEMP_INT

RC9_CDC_RX

RA10_SW1

RA7_SW0

RA11_DGI_DBG2

RA12_WINC_INT

RB4_OCMxn_ERROR

RC4_OCMxn_CONN

RC5_OCMxn_WIFI

RC3_OCMxn_DATA

RC8_CDC_TX

RC9_CDC_RX

RC6_OCMxn_PWM

RB0_SPI_MISO
RA1_SPI_SCK

RB1_SPI_MOSI

RA0_SPI_CS

10uF/16V

C207

10k

R217

PIC-IoT Wx Hardware User Guide

Appendix

8. Appendix

8.1 Schematic

Figure 8-1. PIC-IoT Wx Schematic

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 24

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DEBUGGE R USB MIC RO-B CONNE CTOR

GND

USBD_P

USBD_N

100n

C107

100n

C108

RX

TX

UART

CDC_UART

1k

R106

VCC_DEBUGGER

100n

C105

GND

SRST

STATUS_LED

SHIELD

VBUS

VCC_DEBUGGER

GND

TP100

Testpoint Array

1 2

3 4

5 6

7 8

9 10

TCK

TDO

TMS

Vsup

TDI GND

TRST

SRST

VTref

GND

J102

DBG0

21

GREEN LED

SML-P12MTT86R

D102

VBUS1D-2D+3GND5SHIELD16SHIELD27ID4SHIELD38SHIELD4

9

MU-MB0142AB2-269

J103

PAD

33

PA001PA012PA023PA03

4

GND

10

VDDANA

9

PA045PA056PA067PA07

8

PA08

11

PA09

12

PA10

13

PA11

14

PA14

15

PA15

16

PA1617PA1718PA1819PA1920PA22

21

USB_SOF/PA23

22

USB_DM/PA2423USB_DP/PA25

24

PA27

25

RESETN

26

PA28

27

GND

28

VDDCORE

29

VDDIN

30

SWDCLK/PA30

31

SWDIO/PA31

32

SAMD21E18A-MUT

U100

USBD_P

USBD_N

GND

1u

C106

VCC_MCU_CORE

VCC_DEBUGGER

VCC_DEBUGGER

GND

GND

GND

GND

DBG2

S1_0_TX

S0_2_TX

DAC

VTG_ADC

RESERVED

S0_3_CLK

DBG0_CTRL

CDC_TX_CTRL

BOOT

DEBUGGE R POWE R/STATUS LED

1k

R110

DBG1

DBG1_CTRL

REG_ENABLE

100k

R107

100k

R108

SWCLK

100k

R113

GND

SRST

DEBUGGE R TEST POINT

DBG2_CTRL

CDC_RX_CTRL

100k

R111

SWCLK

DBG2_GPIO

VBUS_ADC

VTG_ADC

ID_SYS

VTG_EN

VBUS_ADC

SWDIO

SWDIO

GND

VOFF

VCC_DEBUGGER

330R

R112

330R

R114

330R

R109

Crossing RX/TX here!

DBG0

DBG2

S1_1_RX

S0_0_RX

VCC_P3V3

GND

GND

4.7uF

C100

GND

Li-Po/Li-Ion Battery

4.7uF

C101

GND

560p

C102

SW

4

PGND

2

VOUT

7

SNS

10

EN

9

VOUT

8

SW

5

VIN

1

AGND

12

EP

13

SW3SW

6

FB/CFF

11

MIC33050-SYHLU102

100k

R100

1k

R102

RED LED

SML-P12VTT86R

2 1

D101

J100

10k

R103

GND

10uF

C103

MCP73871

OUT

1

VPCC

2

SEL3PROG2

4

THERM

5

PG

6

STAT2

7

STAT1/LBO

8TE9

IN18IN

19

CE

17

VSS

10

VSS

11

EP

21

PROG312PROG1

13

VBAT14VBAT15VBAT

16

OUT

20

U101

GND

4.7uF

C104

GND

VBUS

10k

R104

GND

GND

VBUS

100k

R105

1k

R101

VCC_BAT

POWE R SUPPLY AND BATTERY CH ARGER

2 1

GREEN LED

SML-P12MTT86R

D100

1

2

J101

VCC_MUX

VCC_MUX

J104

VCC_DEBUGGER

VCC_TARGET

DBG1

VBUS

DBG3

GND

DBG3_CTRL

1

2 3

DMN65D8LFB

Q100

1k

R115

DBG3_CTRL

DBG3 OP EN DRAIN

Signal

DBG0

DBG1

DBG2

DBG3

ICSP

Interface

DAT

CLK

GPIO

MCLR

CDC TX

CDC RX

UART RX

UART TX

TARGET

VCC -

Programming connector

for factory programming of

the Debugger

MIC33050:

Vin: 2.5V to 5.5V

Vout: Fixed 3.3V

Imax: 600mA

PIC-IoT Wx Hardware User Guide

Appendix

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 25

8.2 Assembly Drawing

®

PAC10002
PAC10001

COC100

PAC10102

PAC10101

COC101

PAC10201

PAC10202

COC102

PAC10302
PAC10301

COC103

PAC10402

PAC10401

COC104

PAC10502

PAC10501

COC105

PAC10602

PAC10601

COC106

PAC10702

PAC10701

COC107

PAC10802

PAC10801

COC108

PAC20002

PAC20001

COC200

PAC20202

PAC20201

COC202

PAC20302

PAC20301

COC203

PAC20402

PAC20401

COC204

PAC20502

PAC20501

COC205

PAC20602

PAC20601

COC206

PAC20701
PAC20702

COC207

PAC20801

PAC20802

COC208

PAD10002

PAD10001

COD100

PAD10101

PAD10102

COD101

PAD10201

PAD10202

COD102

PAD20001

PAD20002

COD200

PAD20101

PAD20102

COD201

PAD20201

PAD20202

COD202

PAD20301

PAD20302

COD203

PAJ10001
PAJ10002

COJ100

PAJ10102

PAJ10101

PAJ10100

COJ101

PAJ10206

PAJ10205

PAJ10204

PAJ10203

PAJ10202

PAJ10201

COJ102

PAJ103011

PAJ103010

PAJ10308

PAJ10309

PAJ10307

PAJ10306

PAJ10301
PAJ10302
PAJ10303
PAJ10304
PAJ10305

PAJ10300

COJ103

PAJ10402
PAJ10401

COJ104

PAJ20105

PAJ20106

PAJ20108

PAJ20107

PAJ20103

PAJ20104

PAJ20102

PAJ20101

PAJ20100

COJ201

PAJ20205

PAJ20206

PAJ20208

PAJ20207

PAJ20203

PAJ20204

PAJ20202

PAJ20201

PAJ20200

COJ202

COLABEL1

PAQ10001
PAQ10002

PAQ10003

COQ100

PAQ20002

PAQ20003

PAQ20001

COQ200

PAR10002

PAR10001

COR100

PAR10102

PAR10101

COR101

PAR10202

PAR10201

COR102

PAR10302

PAR10301

COR103

PAR10402

PAR10401

COR104

PAR10502

PAR10501

COR105

PAR10601

PAR10602

COR106

PAR10701

PAR10702

COR107

PAR10801

PAR10802

COR108

PAR10901

PAR10902

COR109

PAR11002

PAR11001

COR110

PAR11102

PAR11101

COR111

PAR11201

PAR11202

COR112

PAR11301

PAR11302

COR113

PAR11402

PAR11401

COR114

PAR11502

PAR11501

COR115

PAR20001

PAR20002

COR200

PAR20102
PAR20101

COR201

PAR20201

PAR20202

COR202

PAR20301

PAR20302

COR203

PAR20401

PAR20402

COR204

PAR20502

PAR20501

COR205

PAR20601

PAR20602

COR206

PAR20702
PAR20701

COR207

PAR20801

PAR20802

COR208

PAR20901

PAR20902

COR209

PAR21001

PAR21002

COR210

PAR21101

PAR21102

COR211

PAR21201

PAR21202

COR212

PAR21302

PAR21301

COR213

PAR21402

PAR21401

COR214

PAR21502

PAR21501

COR215

PAR21602

PAR21601

COR216

PAR21702

PAR21701

COR217

PASW20005

PASW20002

PASW20001

PASW20004

PASW20003

COSW200

PASW20105

PASW20102

PASW20101

PASW20104

PASW20103

COSW201

PATP10001

COTP100

PATP20001

COTP200

PATP20101

COTP201

PATP20201

COTP202

PATP20301

COTP203

PATP20401

COTP204

PATP20501

COTP205

PATP20601

COTP206

PATP20701

COTP207

PATP20801

COTP208

PATP20901

COTP209

PAU10009

PAU10008

PAU10007

PAU10006

PAU10005

PAU10004

PAU10003

PAU10002

PAU10001

PAU100010

PAU100011

PAU100012

PAU100013

PAU100014

PAU100015

PAU100016

PAU100017

PAU100018

PAU100019

PAU100020

PAU100021

PAU100022

PAU100023

PAU100024

PAU100025

PAU100026

PAU100027
PAU100028

PAU100029
PAU100030

PAU100031

PAU100032

PAU100033

COU100

PAU10101

PAU10102

PAU10103

PAU10104

PAU10105

PAU10106

PAU10107

PAU10108

PAU10109

PAU101010

PAU101011

PAU101012

PAU101013

PAU101014

PAU101015

PAU101016
PAU101017

PAU101018

PAU101019

PAU101020

PAU101021

COU101

PAU102013

PAU10207

PAU10208

PAU10209

PAU102010

PAU102011

PAU102012

PAU10206

PAU10205

PAU10204

PAU10203

PAU10202

PAU10201

COU102

PAU200028

PAU200027

PAU200026

PAU200025

PAU200024

PAU200023

PAU200022

PAU200021

PAU200020

PAU200015

PAU200016

PAU200017

PAU200018

PAU200019

PAU200014

PAU200013

PAU200012

PAU200011

PAU20009

PAU20008

PAU20007

PAU20006

PAU20005

PAU20004

PAU20003

PAU20002

PAU20001

PAU200010

PAU200029

COU200

PAU20101
PAU20102

PAU20103
PAU20104
PAU20105
PAU20106
PAU20107

PAU20108
PAU20109
PAU201010
PAU201011
PAU201012

PAU201013

PAU201014

PAU201015

PAU201016

PAU201017

PAU201018

PAU201019

PAU201020

PAU201021

PAU201022

PAU201023

PAU201024

PAU201025

PAU201026

PAU201027

PAU201028

PAU201029

PAU201030

PAU201031

PAU201032

PAU201033

PAU201034

PAU201035

PAU201036

PAU201037

PAU201038

PAU201039

PAU201040

PAU201041

PAU201042

PAU201043

PAU201044

PAU201045

PAU201046

PAU201047

PAU201048

PAU201049

PAU20100

COU201

PAU20208
PAU20207

PAU20206

PAU20205

PAU20204

PAU20203

PAU20202

PAU20201

PAU20209

COU202

PAU20309

PAU20301

PAU20302

PAU20304
PAU20303

PAU20306

PAU20305

PAU20307
PAU20308

PAU20300

COU203

RB5 / TX

GNDGND

LABEL

AN / RB14RC6 / PWM

SCK / R A1

MISO / R B0RB8 / SCL

®

c

PCBA

CS / RA 0RB6 / RX

+3.3V+5V

RST / RB15RB7 / INT

MOSI / R B1RB9 / SDA

t

-IoT

PIC

E

R

PAC10002
PAC10001

COC100

PAC10102

PAC10101

COC101

PAC10201

PAC10202

COC102

PAC10302
PAC10301

COC103

PAC10402

PAC10401

COC104

PAC10502

PAC10501

COC105

PAC10602

PAC10601

COC106

PAC10702

PAC10701

COC107

PAC10802

PAC10801

COC108

PAC20002

PAC20001

COC200

PAC20202

PAC20201

COC202

PAC20302

PAC20301

COC203

PAC20402

PAC20401

COC204

PAC20502

PAC20501

COC205

PAC20602

PAC20601

COC206

PAC20701
PAC20702

COC207

PAC20801

PAC20802

COC208

PAD10002

PAD10001

COD100

PAD10101

PAD10102

COD101

PAD10201

PAD10202

COD102

PAD20001

PAD20002

COD200

PAD20101

PAD20102

COD201

PAD20201

PAD20202

COD202

PAD20301

PAD20302

COD203

PAJ10001
PAJ10002

COJ100

PAJ10102

PAJ10101

PAJ10100

COJ101

PAJ10206

PAJ10205

PAJ10204

PAJ10203

PAJ10202

PAJ10201

COJ102

PAJ103011

PAJ103010

PAJ10308

PAJ10309

PAJ10307

PAJ10306

PAJ10301
PAJ10302
PAJ10303
PAJ10304
PAJ10305

PAJ10300

COJ103

PAJ10402
PAJ10401

COJ104

PAJ20105

PAJ20106

PAJ20108

PAJ20107

PAJ20103

PAJ20104

PAJ20102

PAJ20101

PAJ20100

COJ201

PAJ20205

PAJ20206

PAJ20208

PAJ20207

PAJ20203

PAJ20204

PAJ20202

PAJ20201

PAJ20200

COJ202

COLABEL1

PAQ10001
PAQ10002

PAQ10003

COQ100

PAQ20002

PAQ20003

PAQ20001

COQ200

PAR10002

PAR10001

COR100

PAR10102

PAR10101

COR101

PAR10202

PAR10201

COR102

PAR10302

PAR10301

COR103

PAR10402

PAR10401

COR104

PAR10502

PAR10501

COR105

PAR10601

PAR10602

COR106

PAR10701

PAR10702

COR107

PAR10801

PAR10802

COR108

PAR10901

PAR10902

COR109

PAR11002

PAR11001

COR110

PAR11102

PAR11101

COR111

PAR11201

PAR11202

COR112

PAR11301

PAR11302

COR113

PAR11402

PAR11401

COR114

PAR11502

PAR11501

COR115

PAR20001

PAR20002

COR200

PAR20102
PAR20101

COR201

PAR20201

PAR20202

COR202

PAR20301

PAR20302

COR203

PAR20401

PAR20402

COR204

PAR20502

PAR20501

COR205

PAR20601

PAR20602

COR206

PAR20702
PAR20701

COR207

PAR20801

PAR20802

COR208

PAR20901

PAR20902

COR209

PAR21001

PAR21002

COR210

PAR21101

PAR21102

COR211

PAR21201

PAR21202

COR212

PAR21302

PAR21301

COR213

PAR21402

PAR21401

COR214

PAR21502

PAR21501

COR215

PAR21602

PAR21601

COR216

PAR21702

PAR21701

COR217

PASW20005

PASW20002

PASW20001

PASW20004

PASW20003

COSW200

PASW20105

PASW20102

PASW20101

PASW20104

PASW20103

COSW201

PATP10001

COTP100

PATP20001

COTP200

PATP20101

COTP201

PATP20201

COTP202

PATP20301

COTP203

PATP20401

COTP204

PATP20501

COTP205

PATP20601

COTP206

PATP20701

COTP207

PATP20801

COTP208

PATP20901

COTP209

PAU10009

PAU10008

PAU10007

PAU10006

PAU10005

PAU10004

PAU10003

PAU10002

PAU10001

PAU100010

PAU100011

PAU100012

PAU100013

PAU100014

PAU100015

PAU100016

PAU100017

PAU100018

PAU100019

PAU100020

PAU100021

PAU100022

PAU100023

PAU100024

PAU100025

PAU100026

PAU100027
PAU100028

PAU100029
PAU100030

PAU100031

PAU100032

PAU100033

COU100

PAU10101

PAU10102

PAU10103

PAU10104

PAU10105

PAU10106

PAU10107

PAU10108

PAU10109

PAU101010

PAU101011

PAU101012

PAU101013

PAU101014

PAU101015

PAU101016
PAU101017

PAU101018

PAU101019

PAU101020

PAU101021

COU101

PAU102013

PAU10207

PAU10208

PAU10209

PAU102010

PAU102011

PAU102012

PAU10206

PAU10205

PAU10204

PAU10203

PAU10202

PAU10201

COU102

PAU200028

PAU200027

PAU200026

PAU200025

PAU200024

PAU200023

PAU200022

PAU200021

PAU200020

PAU200015

PAU200016

PAU200017

PAU200018

PAU200019

PAU200014

PAU200013

PAU200012

PAU200011

PAU20009

PAU20008

PAU20007

PAU20006

PAU20005

PAU20004

PAU20003

PAU20002

PAU20001

PAU200010

PAU200029

COU200

PAU20101
PAU20102

PAU20103
PAU20104
PAU20105
PAU20106
PAU20107

PAU20108
PAU20109
PAU201010
PAU201011
PAU201012

PAU201013

PAU201014

PAU201015

PAU201016

PAU201017

PAU201018

PAU201019

PAU201020

PAU201021

PAU201022

PAU201023

PAU201024

PAU201025

PAU201026

PAU201027

PAU201028

PAU201029

PAU201030

PAU201031

PAU201032

PAU201033

PAU201034

PAU201035

PAU201036

PAU201037

PAU201038

PAU201039

PAU201040

PAU201041

PAU201042

PAU201043

PAU201044

PAU201045

PAU201046

PAU201047

PAU201048

PAU201049

PAU20100

COU201

PAU20208
PAU20207

PAU20206

PAU20205

PAU20204

PAU20203

PAU20202

PAU20201

PAU20209

COU202

PAU20309

PAU20301

PAU20302

PAU20304
PAU20303

PAU20306

PAU20305

PAU20307
PAU20308

PAU20300

COU203

100mil

1000m il

100mil

600mil

200mil

100mil

800mil

200mil

2500mil

100mil

R 1,20mm x 2

R 100mil x 4

16,46mm

R 1,60mm x 4

Figure 8-2. PIC-IoT Wx Assembly Drawing Top

Figure 8-3. PIC-IoT Wx Assembly Drawing Bottom

PIC-IoT Wx Hardware User Guide

Appendix

8.3 Mechanical Drawings

The figures below show the board’s mechanical drawing and connector placement.

Figure 8-4. Mechanical Drawing

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 26

Figure 8-5. Connector Placement

800mil

500mil

USB

900mil

8,93mm

100mil

LIPO

BATTERY

PIC-IoT Wx Hardware User Guide

Appendix

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 27

PIC-IoT Wx Hardware User Guide

The Microchip Website

Microchip provides online support via our website at http://www.microchip.com/. This website is used to make files
and information easily available to customers. Some of the content available includes:

• Product Support – Data sheets and errata, application notes and sample programs, design resources, user’s

guides and hardware support documents, latest software releases and archived software

• General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online

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To register, go to http://www.microchip.com/pcn and follow the registration instructions.

Customer Support

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Embedded Solutions Engineer (ESE)

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Customers should contact their distributor, representative or ESE for support. Local sales offices are also available to
help customers. A listing of sales offices and locations is included in this document.

Technical support is available through the website 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.

• 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.

Legal Notice

Information contained in this publication regarding device applications and the like is provided only for your
convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 28

PIC-IoT Wx Hardware User Guide

your specifications. 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 ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend,
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use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights unless
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Trademarks

The Microchip name and logo, the Microchip logo, Adaptec, AnyRate, AVR, AVR logo, AVR Freaks, BesTime,
BitCloud, chipKIT, chipKIT logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, HELDO, IGLOO, JukeBlox,
KeeLoq, Kleer, LANCheck, LinkMD, maXStylus, maXTouch, MediaLB, megaAVR, Microsemi, Microsemi logo, MOST,
MOST logo, MPLAB, OptoLyzer, PackeTime, PIC, picoPower, PICSTART, PIC32 logo, PolarFire, Prochip Designer,
QTouch, SAM-BA, SenGenuity, SpyNIC, SST, SST Logo, SuperFlash, Symmetricom, SyncServer, Tachyon,
TempTrackr, TimeSource, tinyAVR, UNI/O, Vectron, and XMEGA are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.

APT, ClockWorks, The Embedded Control Solutions Company, EtherSynch, FlashTec, Hyper Speed Control,
HyperLight Load, IntelliMOS, Libero, motorBench, mTouch, Powermite 3, Precision Edge, ProASIC, ProASIC Plus,
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Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BlueSky, BodyCom,
CodeGuard, CryptoAuthentication, CryptoAutomotive, CryptoCompanion, CryptoController, dsPICDEM,
dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP,
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ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A.
and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

The Adaptec logo, Frequency on Demand, Silicon Storage Technology, and Symmcom are registered trademarks of
Microchip Technology Inc. in other countries.

GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip
Technology Inc., in other countries.

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

©

2020, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.

ISBN: 978-1-5224-5656-8

Quality Management System

For information regarding Microchip’s Quality Management Systems, please visit http://www.microchip.com/quality.

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 29

Worldwide Sales and Service

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Corporate Office

2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: [phone]
Fax: [phone]
Technical Support:

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Web Address:

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Tel: [phone]

Los Angeles

Mission Viejo, CA
Tel: [phone]
Fax: [phone]
Tel: [phone]

Raleigh, NC

Tel: [phone]

New York, NY

Tel: [phone]

San Jose, CA

Tel: [phone]
Tel: [phone]

Canada - Toronto

Tel: [phone]
Fax: [phone]

Australia - Sydney

Tel: [phone]

China - Beijing

Tel: [phone]

China - Chengdu

Tel: [phone]

China - Chongqing

Tel: [phone]

China - Dongguan

Tel: [phone]

China - Guangzhou

Tel: [phone]

China - Hangzhou

Tel: [phone]

China - Hong Kong SAR

Tel: [phone]

China - Nanjing

Tel: [phone]

China - Qingdao

Tel: [phone]

China - Shanghai

Tel: [phone]

China - Shenyang

Tel: [phone]

China - Shenzhen

Tel: [phone]

China - Suzhou

Tel: [phone]

China - Wuhan

Tel: [phone]

China - Xian

Tel: [phone]

China - Xiamen

Tel: [phone]

China - Zhuhai

Tel: [phone]

India - Bangalore

Tel: [phone]

India - New Delhi

Tel: [phone]

India - Pune

Tel: [phone]

Japan - Osaka

Tel: [phone]

Japan - Tokyo

Tel: [phone]

Korea - Daegu

Tel: [phone]

Korea - Seoul

Tel: [phone]

Malaysia - Kuala Lumpur

Tel: [phone]

Malaysia - Penang

Tel: [phone]

Philippines - Manila

Tel: [phone]

Singapore

Tel: [phone]

Taiwan - Hsin Chu

Tel: [phone]

Taiwan - Kaohsiung

Tel: [phone]

Taiwan - Taipei

Tel: [phone]

Thailand - Bangkok

Tel: [phone]

Vietnam - Ho Chi Minh

Tel: [phone]

Austria - Wels

Tel: [phone]
Fax: [phone]

Denmark - Copenhagen

Tel: [phone]
Fax: [phone]

Finland - Espoo

Tel: [phone]

France - Paris

Tel: [phone]
Fax: [phone]

Germany - Garching

Tel: [phone]

Germany - Haan

Tel: [phone]

Germany - Heilbronn

Tel: [phone]

Germany - Karlsruhe

Tel: [phone]

Germany - Munich

Tel: [phone]
Fax: [phone]

Germany - Rosenheim

Tel: [phone]

Israel - Ra’anana

Tel: [phone]

Italy - Milan

Tel: [phone]
Fax: [phone]

Italy - Padova

Tel: [phone]

Netherlands - Drunen

Tel: [phone]
Fax: [phone]

Norway - Trondheim

Tel: [phone]

Poland - Warsaw

Tel: [phone]

Romania - Bucharest

Tel: [phone]

Spain - Madrid

Tel: [phone]
Fax: [phone]

Sweden - Gothenberg

Tel: [phone]

Sweden - Stockholm

Tel: [phone]

UK - Wokingham

Tel: [phone]
Fax: [phone]

© 2020 Microchip Technology Inc.

User Guide

DS50002964A-page 30