masters 2012 - introduction to microchip usb solutions

© 2012 Microchip Technology Incorporated. All Rights Reserved. 1640 USB1 Slide 1

1640 USB1

Introduction to

Microchip USB Solutions

Rocker

Nota

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Objectives

When you finish this class you will be able to:

Describe the basics of USB, and how apply them in an embedded application

Identify Microchip’s USB MCUs, development boards, and USB software frameworks relevant to your project

Chose the right USB MASTERs classes you need to attend


Agenda

USB Fundamentals

Microchip USB solutions

Design considerations

How to get started

Summary


Universal Serial Bus

Extend the functionality of

your computer!

Data Analysis,

Data Logging,

Firmware Updates,

Diagnostics,

Embedded Applications!

• Auto detection & configuration (Plug & Play)

• Easy expansion using hubs

• Bus power

• Data CRC protected, bad packets resent

• Four speeds:

Low- 1.5, Full- 12, High- 480, Super- 5000 Mb/s

Serial

Parallel

PS/2


Agenda

USB Fundamentals



How to get started

Summary


USB Basics USB is a “Single Master + Multiple Slaves” polled bus

Mouse Speakers Printer

USB Host Controller (Master)

and Root Hub

Frame Frame Frame

Start Of Frame Mouse Packets Speakers Packets Printer Packets


USB Host

Manages and controls the bus

Initiates all communications

Automatically detects all device insertions and extractions

Enumerates all devices connected and matches them with drivers


Typical MCU Requirements for Host

Typically Host is a PC

USB 3.0 Host Controller, running at Full Speed (12 Mbps) or High Speed (480 Mbps) or Super Speed (5 Gbps)

High throughput 32/64 bit CPU running a Operating System like Windows®

USB Drivers identifying and enumerating USB Devices

Automatic update of USB drivers


Host in Embedded Design

Alternative: Implement PC in an MCU High Cost, Larger real estate

Overkill for Embedded Designs

Solution: Implement Embedded Host


Embedded Host

Embedded Host connects to a fixed number of USB Peripheral Devices – USB Drivers fixed in firmware

Advantage: Smaller, less complex embedded firmware

Example: Remote Temperature Data Logger Download data to USB Flash Drive

Not connected directly to PC Host but …

You can exchange data with PC Host using the Flash Drive


Typical Requirements for Embedded Host

Peripherals to service real world I/O:

A/D converters, Comparators, etc.

Serial Interfaces like SPI, I2C™, UART

PWMs, Timers and I/O lines

Full Speed (12 Mbps) USB 2.0 Transceiver with data input/output buffers

High throughput 16/32-bit MCU

Host Firmware Drivers to identify and enumerate USB Peripheral Devices

Microchip’s 16 and 32 bit USB PIC® MCUs are designed for Embedded Host applications


USB 2.0 vs USB 3.0

Microchip USB MCUs support USB 2.0 full-speed or low-speed

USB 3.0 devices are supported at full-speed (12Mbps)


USB Peripheral Device

Responds to Host, cannot initiate transactions

Requires drivers to be recognized by the Host

Hardware/Firmware to respond to Host

Microchip’s PIC® MCUs are used in USB Peripheral Devices


Typical MCU Requirements for Peripheral Device

Peripherals to service real world I/O: A/D converters, Comparators, etc.



Full Speed (12 Mbps) USB 2.0 Transceiver with data input/output buffers

Throughput to service Full speed USB requests

USB Device and peripheral interface Firmware

All USB PIC® MCUs are designed for USB Peripheral Device applications


USB On-The-Go (OTG)

USB On-The-Go (OTG) allows Application to operate as Host or Device: PDA (Device) connected to PC (Host)

PDA (Host) connected to Thumb drive (Device)

PDA connected to PDA, host and device roles can switch (OTG mode)

PDA OTG Host

PDA OTG Device

PC Host PDA OTG Host

PDA OTG Device Thumb Drive


Typical Requirements for OTG Devices

Peripherals to service real world I/O:

A/D converters, Comparators, etc.



Full Speed (12 Mbps) USB 2.0 OTG Transceiver with data input/output buffers

High throughput 16/32-bit MCU

Host Software Drivers to identify and enumerate USB Peripheral Devices Device Drivers when connected to Host/OTG

Microchip’s 16 and 32-bit USB PIC® MCUs are designed for USB OTG applications


Other USB Device Types

Hub Repeats traffic (both directions), manages power

Compound Device Contains a hub and 1 or more peripherals

Host treats hub and peripheral function separately (each has its own address) i.e. USB keyboard with 1-port hub

Composite Device Has multiple interfaces active at the same time

Host loads a driver for each interface i.e. video camera (both audio & video interfaces active)


MCP2200: USB to UART Serial Converter

Enables USB connectivity in applications with UART

Pre-programmed USB stack

Easy to configure

USB 2.0 Compliant

Full-speed USB

USB activity LED outputs

Fully configurable

VID and PID assignments

Easiest way to add USB to your design

UART

Controller

EEPROM

Control USB Protocol

Controller

USB

Transceiver

USB LEDs GPIO

LDO, Osc,

Reset


MCP2210: USB-to-SPI Master Converter

Enables USB connectivity in applications with SPI interface

Enumerate as HID device

Easy to configure

USB 2.0 Compliant

Full-speed USB

USB activity LED outputs

Fully configurable

VID and PID assignments

Easiest way to add USB to your design

SPI interface

(Master)

EEPROM

Control USB Protocol

Controller

USB

Transceiver

USB LEDs GPIO

LDO, Osc,

Reset


Dual Role Devices (DRDs)

Allows application to operate as Host or Device: 2 connectors (Standard A & B or mini B or micro B)

Must have some type of mechanical block so that both connectors are not accessible at any given point of time

No need to dynamically switch the role, connector used decides which is the role

Example: Data Logger with field update via PC


PIC24F or PIC32MX

USB device

Embedded

Host

Receptacle

DRD Example Circuit

VBUS

D+

D-

GND

5v

PPTC

A/D

VBUS

D+

D-

VUSB

2KΩ

2KΩ

150μF

1μF

3.3v

Input

Peripheral

Receptacle

VBUS

D+

D-

GND

1μF 150KΩ


Physical Interface

Half Duplex with NRZI Data Encoding

Bus Power to each device: 4.40 - 5.25 V

Guaranteed 100 mA

500 mA maximum through negotiation

~ 5.0 V

~ 3.3 V

Must use external

power if more is

required

VBUS

D+

D-

GND

VBUS

D+

D-

GND


“mini-B”

USB

Device

“B”

USB

Device

Standard Connectors

“A”

USB Host

Full or Embedded

“micro-B”

USB

Device

“micro-AB”

OTG

Device

μB μB


“mini-B”

USB

Device

“B”

USB

Device

Standard Connectors

“micro-AB”

OTG

Host

“micro-B”

USB

Device

μB

μA

“micro-AB”

OTG

Device

“micro-AB”

OTG

Host

μB

μA


Physical Bus Topology

USB Host Controller

& Root Hub

Hub Speaker

Logic

Analyzer

Up to 126 peripherals...

Keyboard

Hub: Max Chaining = 5

8-bit USB PIC® MCUs are

designed to be peripherals

16- and 32-bit USB PIC

MCUs and dsPIC® DSCs

can function as either

embedded hosts or

peripherals

Host (Tier 1)

Tier 2

Tier 3

Tier 4

Tier 5

Tier 6

Tier 7

Hub

Hub

Hub

Hub

Hub Data Logger

Printer


Logical Bus Topology

Not a tiered-star!

Host software communicates to each “logical” device as if it were directly connected to the root hub

Host

Logical

Device

Logical

Device

Logical

Device

Logical

Device Logical

Device

Logical

Device


Host System Peripheral Device

Physical Communication Path

Logical Communication Path (“Pipe”)

USB Device Framework - Software View of Hardware -

Bu

s In

terf

ace

La

ye

r

Bu

s In

terfa

ce

La

ye

r

USB Bus

Interface SIE

USB Bus Interface

SIE Host

Controller

USB Cable Transactions

Function Function

Function

Fu

nctio

n L

aye

r F

un

ctio

n L

aye

r

Interface Client

Software

Client

Software

Client

Software

Pipe Bundle

Buffers Interface-specific

US

B D

evic

e

La

ye

r U

SB

De

vic

e

La

ye

r

USB Logical

Device Endpoint

zero

USB System

Software Default Pipe (EP0)

Transfers Data per Endpoint


Endpoints: Source/Destination of USB Data in a Peripheral

RAM

Endpoint 1 OUT

RAM

Endpoint 1 IN

Data Bucket

LED

“Caps-Lock”

Maximum number of endpoints per device specified by USB specification:

16 OUT endpoints + 16 IN endpoints = 32 endpoints

PIC18F87J50, PIC18F4550, PIC24F, PIC32MX supports up to 32 endpoints

PIC18F14K50 supports up to 16 endpoints

EP0 = Default Communication Pipe

USB framed data

USB framed data

USB PIC® MCU


The “Logical” Device

Device (Manufacturer: Microchip Technology)

(Product: Mouse in a Circle Demo)

Configuration

Interface

IN (Endpoint 0) USB System Software

(default control pipes)

USB Device-Specific Pipe(s)

(Human Interface Device)

HID TX/RX Functions

(MCHPFSUSB FW)

Analog/Digital I/O

OUT (Endpoint 0)

IN (Endpoint x)

OUT (Endpoint x)

These settings are

represented by a Device

Descriptor Table, stored

in firmware. More on

this later…


USB Transaction

Token Packet

USB Transaction

Specifies:

• Target device address

• Endpoint number

• Direction of the data transfer

SETUP and OUT token types

inform the target device that

the host wants to send data.

IN token type informs the target

device that the host wants to

fetch data.


IN Transaction ACK

IN Token Packet

USB Transaction

Data Packet

Handshake Packet

Acknowledge - ACK


IN Transaction NAK

IN Token Packet

USB Transaction

Handshake Packet

Not Acknowledge - NAK


OUT Transaction ACK

OUT Token Packet

USB Transaction

Data Packet

Handshake Packet

Acknowledge - ACK


OUT Transaction NAK

OUT Token Packet

USB Transaction

Data Packet

Handshake Packet

Not Acknowledge - NAK


Demo - Capturing a Transaction -

To read the potentiometer value, the PIC24F USB embedded host continually sends command “0x37”

The PIC18F USB device Returns Command Code + 10-bit Potentiometer ADC value: <0x37><ADRESL><ADRESH>


Demo - Capturing a Transaction -


Transfer: A Group of Related Transactions

MPUSBWrite(EP7, Pointer, Size = 129, Timeout)

Transfer

Transaction 1

64 Byte Payload OUT Token Packet

Data Packet

ACK Handshake Packet

Key:

Transaction 2

64 Byte Payload

Transaction 3

1 Byte Payload


Data Transfer Types

Transfer/ Endpoint

Type

Polling Interval

% Reserved BW/Frame for all transfers of

this type

Max. # Data Bytes/Frame/Endpoint

(Max# transactions per frame @ Max Ep Size)*

Data Integrity

Interrupt Fixed, Periodic 90 64 (1 x 64) Yes

Isochronous Fixed, Periodic 90 1023 (1 x 1023) No

Bulk Variable, Uses Free Bandwidth

0 1216 (19 x 64) Yes

Control Variable 10 832 (13 x 64) Yes

*Assumes transfers use maximum packet sizes allowed per Ep type


Interrupt Transfer Example

1


64 64

Frame

Traffic to other Endpoints or Idle Transactions


Bulk Transfer Example

1 64 64

Frame

Transactions only occur if no higher

priority traffic

Int. Int. Isoc. Int.



Theoretical Maximum Transfer Rate Per Endpoint

24

832

0.8 64

1216

1023

0

200

400

600

800

1000

1200

1400

KByte/s

Control Interrupt Bulk Iso

Transfer Type

Low

Full


Quiz!

Mouse Speaker Printer

Control

+

Interrupt

Control

+

Bulk

Control

+

Isochronous


USB Device Classes

Joystick

Mouse

External

Hard Drive

MPLAB®

REAL ICE™ in-circuit emulator

Modem

Floppy

Drive Data Glove

Keyboard

Ethernet

Adapter

Human Interface Device Class

(HID)

Mass Storage Device

Class (MSD)

Communication Device

Class (CDC)

Custom Class

(Vendor Class)

Many more classes….

PICkit™ 3

Starter Kit


The Enumeration Process

DETACHED

POWERED Power

(self/bus)

DEFAULT

Bus

reset

ADDRESS

Get Device

Descriptor

CONFIGURED

Get

Descriptors

ATTACHED

Cable

Connected SUSPENDED


Descriptors

Device

Configuration 1

Interface 0

Endpoint

Interface 1

Endpoint Endpoint Endpoint

To other Configurations if any

To other

Interfaces if any

String 0

String 1

String N

Descriptors are typically stored in non-volatile/Flash memory


PICDEMTM USB

Microchip

Descriptors - Example

Device

Configuration 1

Interface 0

Endpoint

Manu. String

Prod. String

USB 2.0, VID = 0x04D8,

PID = 0x0007, Num. Configurations,

Strings?

Configuration #1: Bus-Powered,

Remote Wakeup, 500mA, Num.

Interfaces

Interface #0: HID Class, Num.

Endpoints

Endpoint 1 IN, Interrupt Transfer

Type, 64-byte buffer, Poll every 3 ms Unicode

Characters

Go USB!

Other String


Demo - Viewing Descriptor Information -


VID & PID

Vendor ID (VID): 16-bit number

Required to market your product

http://www.usb.org/developers/vendor

USD $2,000

Technical & Legal trouble if not using an approved VID

Product ID (PID): 16-bit number

Microchip’s Sub-licensing Program

Every USB Device product line is required to have a unique combination of VID and PID


USB Compliance

Compliance Testing

Must pass to use USB logo

Test fee: USD ~$1,500

Tests device for conformance to USB Framework and Class standard control requests

USB Protocol Analyzer

“USBCV” USB Command Verifier

www.usb.org/developers/tools

Electrical Signal Quality

Power Management


Compliance Testing

For USB Compliance Testing: Download appropriate checklist:

http://www.usb.org/developers/compliance/check_list/peripheral_checklist.pdf

http://www.usb.org/developers/compliance/check_list/compchk_otgeh2_0_v1.0_-_fill-in.pdf

Use certified USB receptacle and cable for testing

Know the TID (Test ID) of your components Find USB PIC® MCUs TID number on www.microchip.com/usb

For USB Compliance certification: Independent Test Labs (see www.usb.org for a list)

You need to provide them a compiled Checklist with your device

It’s a good idea to take a look at the

checklist before starting your design!


Agenda

USB Fundamentals



How to get started

Summary


PIC16F1/PIC18F Small, Low Power, Low Cost

Up to 16 MIPS 14- to 80-Pin Packages

Up to 128KB Flash Up to 4KB RAM

USB 2.0 Device Support

Migration

Perf

orm

an

ce

100+ USB PIC MCUs The industry’s strongest

scalable product, family,

and software migration path

Scalable USB PIC® MCU Portfolio

PIC24F/PIC24E/dsPIC33E Low Power, GPU, DSP Engine

Up to 70 MIPS 28- to 144-Pin Packages

Up to 512 KB Flash Up to 96KB RAM

USB 2.0 Device, Embedded Host, OTG

PIC32 High Performance, Pin Compatible to PIC24F

80 MHz, 1.53 DMIPS/MHz Up to 80 MIPS

28- to 100-Pin Packages Up to 512 KB Flash Up to 128 KB RAM

USB 2.0 Device, Embedded Host, OTG

32-bit

8-bit

16-bit


Microchip Application Libraries

Download from www.microchip.com/MLA

Contains different stacks (USB, TCP/IP, Graphics, mTouch™ Sensing Solution, MDD FS, etc.)

Default installation path: C:/Microchip Solutions vYYYY-MM-DD/

Contains libraries source code and several example firmware projects based on Microchip’s Development Tools


Microchip USB Frameworks - www.microchip.com/MLA -

MCHPFSUSB Framework PIC16F, PIC18F, PIC24F/E, dsPIC33E & PIC32 USB MCUs

XC8/XC16/XC32 Compatible

MPLAB® X IDE Project Centric

Device Stacks Audio, CCID, CDC, HID, MSD, PHDC, Custom

Polling or Interrupt driven

Embedded Host Stack PIC24F/E, dsPIC33E & PIC32 USB MCUs

Polling or Event-driven Scheme

Client drivers for Basic Android Accessory, CDC, Charger, Custom, HID, MSD, Printer

On-The-Go (OTG) Support PIC24F/E, dsPIC33E & PIC32 USB MCUs


USB Configuration Tool


MCHPFSUSB Device Class Demos Available

Smart Card

Class

Smart Card

Reader

RS-232

Basic


Class (CDC) Audio

Class

MIDI

Speaker

Microphone

Joystick

Mouse

UPS

Keyboard

Human Interface

Device Class (HID)

Digitizer

Custom

More demos in future releases…

MCHP

WinUSB

LibUSB

Custom Class

(Vendor Class)

WinUSB high bandwidth

HID+MSD

WinUSB+MSD

CDC+MSD

Composite

Demos

SDC Data

Logger

SD Card

Reader

Internal

Flash

Mass Storage Device

Class (MSD)

Personal Healthcare

Device Class

Weighing

Scale

Glucose

Meter

Thermometer

Blood

Pressure


MCHPFSUSB EH Client Driver Demos Available

Mouse

Keyboard

Human Interface

Device Class (HID)

MCHP

Custom Class

(Vendor Class)

Audio

Class

MIDI

Battery Charging

Class

Simple

Charger

RS-232


Class (CDC)

More demos in future releases…

Thumb

Drive Data

Logger

Mass Storage Device

Class (MSD)

Simple

Demo

CDC+MSD

HID+MSD

Composite

Demos

Simple POS Simple Full

Sheet

Print

Screen

Printer Class

Dual Role Device

MSD Host + HID Device

OTG

MCHP Custom


Agenda

USB Fundamentals



How to get started

Summary


Considerations When Using Standard Classes

The Logical USB Device is pre-defined Max. bandwidth is fixed

The Device data communication protocol is defined For CDC Class the PIC® MCU looks like

a modem, or terminal connected to a COM port

Main Benefit: Cross-platform use Custom OS driver is not required!


CDC – RS-232 Emulation

PC Computer PIC® Microcontroller

USB Cable

Hyper Terminal CDC

INF File Required (Supplied in MCHPSUSB)

Standard Windows Drivers

Design Considerations:

• ~80 KB/s max

• Bulk Transfers

• PC applications can access the device as though it

is connected to a serial COM port


Human Interface Device (HID)


USB Cable

HID App HID\Mouse

Standard Windows Drivers


• 64 KB/s max

• Interrupt Transfer Type

• Standard Windows driver

• Custom PC application can access HID data

through Win32 APIs

HID Bootloader


Generic Driver Demo

Custom Class Driver


USB Cable

MCHPUSB.sys

Binary Only

MPUSBAPI.dll

Source and

Binary

Bootloader

PDFSUSB.exe

Binary Only Other C++

Examples

Source and

Binary


• ~1,088 KB/s max

• Very flexible (Control, Bulk, Interrupt transfers are

possible)

• Not a standard Windows driver

• PC programming is required

INF File Required

(Supplied in MCHPFSUSB)


Agenda

USB Fundamentals



How to get started

Summary


USB Device

1641 USB2 USB Human Interface Device (HID) Class

1642 USB3 USB Communication Device Class (CDC) – Serial Port Emulation

1643 USB4 USB Device - Generic Driver Solutions

USB Classes


USB Device

1644 USB5 USB Personal Healthcare Device Class (PHDC)

1645 USB6 Using USB Interface Bridges to Enable Embedded System Communication with USB Hosts

USB Classes


USB Embedded Host

1646 USB7 USB Embedded Host and On-The-Go (OTG)

1626 FAT Using the FAT File System Library to Manipulate Files on a USB Thumb Drive

USB Classes


Microchip Technical Training

Worldwide Training Centers and live online classes

In-depth Technical Training with Hands-on

Ethernet, Motor control, Graphics, USB, etc.

Local Language Support

Live Onsite training available

www.microchip.com/training

USB classes

COM3101 – Introduction to Full- Speed USB

COM3201 – Designing a Custom USB Peripheral Application

COM3202 – Designing a USB Embedded Host Application

Wrap Up

http://www.microchip.com/training


Agenda

USB Fundamentals



How to get started

Summary


Summary

USB Fundamental Host is master

Up to 126 devices sharing bandwidth

Microchip USB solutions USB PIC® MCUs and dsPIC® DCSs

Free USB software & demo codes

Design considerations USB Classes Pros & Cons

How to get started USB classes at MASTERs 2012

Microchip Technical Training Live


Additional Resources

Microchip Design Center www.microchip.com/USB

http://www.microchip.com/USB


MCHPFSUSB Framework - Supported Platforms -

Low Pin Count USB Development Kit (PIC18F14K50 Family)

PICDEM™ Full Speed USB (PIC18F4550 family)

MPLAB® Starter Kit for PIC18F MCU (PIC18F46J50 family)

PIC18FxxJ50 FS USB Demo Board (+ HPC Explorer Board)

MPLAB Starter Kit for PIC24F (PIC24FJ256GB106)

PIC24FJ64GB502 Microstick

PIC24FJ256DA210 Development Kit

PIC24F USB PIMs (+ Explorer 16 + USB PICtail™ Plus)

dsPIC33E/PIC24E PIMs (+ Explorer 16 + USB PICtail Plus)

PIC32 USB PIMs (+ Explorer 16 + USB PICtail Plus)

PIC32 USB Starter Board (PIC32MX460F512L family)

PIC32 USB Starter Board II (PIC32MX795F512L family)


Contains everything you need to get started quickly

Use with any of the PIC18F4550 family microcontrollers

Includes self-directed class and lab material

The Demo Kit provides all of the hardware and software

needed to demonstrate and develop a complete USB

communication solution

Priced from $59.99

Part Numbers

DM163025

Available Now

PICDEM™ Full Speed USB Demo Kit


Contains everything you need to get started quickly

Can be plugged into PICDEM™ HPC Explorer Board or PICDEM PIC18 Explorer Board

Can be operated as a stand-alone board

Priced from $40.00

Part Numbers MA180021 - PIC18F87J50 FS USB PIM

MA180024 - PIC18F46J50 FS USB PIM

MA180029 - PIC18F47J53 FS USB PIM

DM183032 - PICDEM PIC18 EXPLORER BOARD

Available Now

PIC18FXXJ50 Full-Speed USB Plug-In Module (PIM)


Low Pin Count USB Development Kit

Contains everything you need to get started quickly Use with new 20-pin PIC18F USB microcontrollers –

PIC18F13K50, PIC18F14K50

Includes self-directed class and lab material

Quickly implement common USB functions: RS-232 to Serial

Keyboard/Mouse, etc…

Priced from $39.99

Part Numbers DM164127

DV164139 (w/PICkit™ 3)

Available Now


PIC18 Starter Kit

Functions as a USB mouse, joystick or mass storage device all using the on-board capacitive touch sense pads

Includes a MicroSD™ memory card, potentiometer, acceleration sensor, and OLED display

On-board debugger/programming

Completely USB-powered

Demonstrates PIC18 Family USB communication

Priced from $59.98

Part Numbers DM180021

Available Now


16-/32-bit USB Starter Kits

PIC24F Starter Kit Part #: DM240011

PIC24FJ256GB110

Priced from $59.98

PIC32 USB Starter Kit II Part #: DM320003-2

PIC32MX795F512L

Priced from $55.00

PIC32 Ethernet Starter Kit Part #: DM320004

PIC32MX795F512L

Priced from $72.00

All Available Now

Debugger

Port

Thumb Drive

Connection

(Host)

On-The-Go Port

(Dual-Role)


16-/32-bit USB Development Boards

Explorer 16 + USB PICtail™ Plus Daughter Board + USB PIMs Part #: MA320003/MA240014

Part #: DM240001

Part #: AC164131

Priced from $214.99

All Available Now


Thank You!

Please complete the Class Evaluation Form


Trademarks

The Microchip name and logo, the Microchip logo, dsPIC, KeeLoq, KeeLoq logo, MPLAB,

PIC, PICmicro, PICSTART, PIC32 logo, rfPIC and UNI/O are registered trademarks of

Microchip Technology Incorporated in the U.S.A. and other countries.

FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL

and The Embedded Control Solutions Company are registered trademarks of Microchip

Technology Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, chipKIT, chipKIT logo, CodeGuard,

dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense,

HI-TIDE, In-Circuit Serial Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified

logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM,

PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC,

UniWinDriver, WiperLock 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.

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

© 2012, Microchip Technology Incorporated, All Rights Reserved.

masters 2012 - introduction to microchip usb solutions

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