Freescale Semiconductor KW2xDxxx User manual

Document Number: TWR-KW2xDxxxHWRM
Rev. 0.2
10/2013
Tower KW2xDxxx Hardware
Reference Manual

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Contents
Chapter 1
Safety Information
1.1 FCC Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1.1 Labeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1.2 Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1.3 Exposure Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1.4 Antenna Restrictions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Regulatory Approval For Canada (IC RSS 210) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2.1 26 PART 5 – Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3 Electrostatic Discharge Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.4 Disposal Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Chapter 2
TWR-KW2xDxxx Development Platform Overview and Description
2.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.3 Software and Driver Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Chapter 3
TWR-KW2xDxxx
3.1 TWR-KW2xDxxx Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1.1 PCB Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1.2 Form Factor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1.3 Board Level Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.2 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.2.1 RF Performance and Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.2.2 Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.2.3 Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
3.2.4 TWR-KW2xDxxx Peripheral Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.2.4.1 Serial FLASH (SPI Interface). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.2.4.2 TWRPI Connectors J9 and J10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
3.2.4.3 Jumper Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
3.2.4.4 MKW24D512 USB Supply (J6) - TWR-MK24D512 Board Only . . . . . . . . . . . . . . . 3-12
3.2.4.5 MKW21D256 (Non-USB) UART2 Support - TWR-MK21D256 Board Only . . . . . . 3-12
3.3 Schematic, Board Layout, and Bill of Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
3.3.1 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Chapter 4
PCB Manufacturing Specifications
4.1 Single PCB Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 Panelization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

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4.4 Solder Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.5 Silk Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.6 Electrical PCB Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.7 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.8 Hole Specification/Tool Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.9 File Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Tower KW2xDxxx Hardware Reference Manual, Rev. 0.2
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About This Book
This manual describes Freescale’s TWR-KW2xDxxx development platform hardware. The
TWR-KW2xDxxx is an IEEE® 802.15.4 compliant evaluation environment based on the Freescale
MKW2xDxxx device. The MKW2xDxxx family is Freescale's latest generation ZigBee™ platform,
which incorporates a complete low power 2.4 GHz radio frequency transceiver and a Kinetis family low
power, mixed-signal ARM Cortex™-M4 MCU into a single package. This family of products is targeted
to meet the higher performance requirements of ZigBee Pro and ZigBee IP based applications, especially
SmartEnergyandCommercialBuildingAutomation.Thisproduct is a cost-effectivesolutionthatmatches
or exceeds competitive solutions.
Audience
This manual is intended for system designers.
Organization
This document is organized into the following chapters.
Chapter 1 Safety Information — Highlights some of the FCC requirements.
Chapter 2 TWR-KW2xDxxx Development Platform Overview and Description — Provides
an overview of the boards that comprise the TWR-KW2xDxxx development
platform.
Chapter 3 TWR-KW2xDxxx — This chapter details the TWR-KW21D256 and
TWR-KW24D512 evaluation boards.
Chapter 4 PCB Manufacturing Specifications — This chapter provides the specifications
used to manufacture the various TWR-KW2xDxxx printed circuit boards (PCBs).
Revision History
The following table summarizes revisions to this document since the previous release (Rev. 0.0).
Revision History
Location Revision
Entire document First public release

Tower KW2xDxxx Hardware Reference Manual, Rev. 0.2
vi Freescale Semiconductor
Definitions, Acronyms, and Abbreviations
The following list defines the acronyms and abbreviations used in this document.
ADC Analog to Digital Converter
AES Advanced Encryption Standard
CTS Clear to Send
DAC Digital to Analog Converter
I2C Inter-Integrated Circuit is a multi-master serial computer bus
ISM Industrial Scientific Medical 2.4 GHz radio frequency band
JTAG Joint Test Action Group
LGA Land Grid Array
MAC Media Access Controller
MCU Microcontroller Unit
PCB Printed circuit board
PiP Platform in Package
PWM Pulse-width modulation
RCM Remote Control Module
REM Remote Extender Board
RTS Request to Send
SMA Connector SubMiniature version “A” connector
SoC System on Chip
SPI Serial Peripheral Interface
SSI Synchronous Serial Interface
TACT Switch A switch that provides a slight “snap” or “click” to the user to indicate function.
TELCO Telephone Company
TWR Tower System
USB Universal Serial Bus
VCP Virtual Com Port

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Chapter 1
Safety Information
1.1 FCC Guidelines
This equipment is for use by developers for evaluation purposes only and must not be incorporated into
any other device or system. This device may not be sold to the general public. Integrators will be
responsible for reevaluating the end product (including the transmitter) and obtaining a separate FCC
authorization.
FCC approval of this device only covers the original configuration of this device as supplied. Any
modifications to this product, including changes shown in this manual, may violate the rules of the Federal
Communications Commission and Industry Canada and make operation of the product unlawful.
1.1.1 Labeling
FCC labels are physically located on the back of the board.
1.1.2 Operating Conditions
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
• This device may not cause harmful interference.
• This device must accept any interference received, including interference that may cause undesired
operation.
1.1.3 Exposure Limits
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
The antenna(s) used for this equipment must be installed to provide a separation distance of at least 8
inches (20cm) from all persons.
1.1.4 Antenna Restrictions
An intentional radiator shall be designed to ensure that no antenna other than that furnished by the
responsible party shall be used with the device. The use of a permanently attached antenna or of an
antenna that uses a unique coupling to the intentional radiator shall be considered sufficient to comply with
the provisions of this Section. The manufacturer may design the unit so that a broken antenna can be
replaced by the user, but the use of a standard antenna jack or electrical connector is prohibited. This
requirement does not apply to carrier current devices or to devices operated under the provisions of
Sections 15.211, 15.213, 15.217, 15.219, or 15.221. Further, this requirement does not apply to intentional

Safety Information
Tower KW2xDxxx Hardware Reference Manual, Rev. 0.2
1-2 Freescale Semiconductor
radiators that must be professionally installed, such as perimeter protection systems and some field
disturbance sensors, or to other intentional radiators which, in accordance with Section 15.31(d), must be
measured at the installation site. However, the installer shall be responsible for ensuring that the proper
antenna is employed so that the limits in this Part are not exceeded.
1.2 Regulatory Approval For Canada (IC RSS 210)
This device complies with Industry Canada licence-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.
1.2.1 26 PART 5 – Appendix
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.
1.3 Electrostatic Discharge Considerations
Although damage from electrostatic discharge (ESD) is much less common on these devices than on early
CMOS circuits, normal handling precautions should be used to avoid exposure to static discharge.
Qualification tests are performed to ensure that these devices can withstand exposure to reasonable levels
of static without suffering any permanent damage.
All ESD testing is in conformity with the JESD22 Stress Test Qualification for Commercial Grade
Integrated Circuits. During the device qualification ESD stresses were performed for the human body
model (HBM), the machine model (MM) and the charge device model (CDM).
All latch-up test testing is in conformity with the JESD78 IC Latch-Up Test.
When operating or handling the development boards or components, Freescale strongly recommends
using at least the grounding wrist straps plus any or all of the following ESD dissipation methods:
• Flexible fabric, solid fixed size, or disposable ESD wrist straps
• Static control workstations, static control monitors and table or floor static control systems
• Static control packaging and transportation materials and environmental systems
1.4 Disposal Instructions
This product may be subject to special disposal requirements. For product disposal instructions, refer to
www.freescale.com/productdisposal.

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Chapter 2
TWR-KW2xDxxx Development Platform Overview and
Description
2.1 Introduction
The TWR-KW2xDxxx development platform is an evaluation environment based on the Freescale
MKW21D256 or MKW24D512 SIP devices (MKW2xDxxx).
The MKW2xDxxx device family is Freescale's latest generation ZigBee™ platform which incorporates a
complete low power 2.4 GHz radio frequency transceiver and a Kinetis family low power, mixed-signal
ARM Cortex™-M4 MCU into a single package. Additionally, the MKW2xDxxx comprising of a a 2.4
GHz Industrial, Scientific, and Medical (ISM) and Medical Body Area Network (MBAN) transceiver are
intended for the IEEE® 802.15.4 Standard.
Freescale supplements the MKW2xDxxx with tools and software that include hardware evaluation and
development boards, software development IDE and applications, drivers, custom PHY usable with
Freescale’s IEEE 802.15.4 compatible MAC.
The TWR-KW2xDxxx development platform comprises two boards:
• Tower — TWR-KW21D256 — this board contains the MKW21D256 device with 32 MHz
reference oscillator crystal, RF circuitry including antenna, and supporting circuitry. The board is
astandalone, with a softwarestackto implement an IEEE 802.15.4 Standardplatformsolution. The
following list summarizes the features of the TWR-KW21D256 board.
— Provides compact reference design for device footprint and RF layout.
— Provides pre-designed MKW21D256 hardware (device and function).
— Provides access to the MKW21D256 set of GPIO/Alternate port functions.
— Provides target MCU Cortex 20-pin (0.05”) JTAG debug port.
— Provides a Mini USB Type B coupled with OpenSDA use as debug interface, serial
communication and power supply (J13, Cortex 10-pin (0.05”) JTAG port for OpenSDA
updates).
• Tower — TWR-KW24D512 — this board contains the MKW24D512 device with 32 MHz
reference oscillator crystal, RF circuitry including antenna, and supporting circuitry. The board is
astandalone, with a softwarestackto implement an IEEE 802.15.4 Standardplatformsolution. The
following list summarizes the features of the TWR-KW24D512 board.
— Provides compact reference design for device footprint and RF layout.
— Provides pre-designed MKW24D512 hardware (device and function).
— Provides access to the MKW24D512 set of GPIO/Alternate port functions.
— Provides MCU JTAG Cortex 20-pin (0.05”) JTAG debug port.

TWR-KW2xDxxx Development Platform Overview and Description
Tower KW2xDxxx Hardware Reference Manual, Rev. 0.2
2-2 Freescale Semiconductor
— Provides a Mini USB Type B coupled with OpenSDA used as debug interface, serial
communication and power supply (J13, Cortex 10-pin (0.05”) JTAG port for OpenSDA
updates)
— The TWR-KW24D512 also provides a Micro USB Type AB used as serial communication and
power supply.
Whether the TWR-KW2xDxxx is used in a simple standalone application or in combination with another
reference platform, Freescale provides a complete software development environment called the Freescale
BeeKit Wireless Connectivity Toolkit (BeeKit). BeeKit is a comprehensive codebase of wireless
networking libraries, application templates, and sample applications. A wide range of software
functionality are available to complement the TWR-KW2xDxxx platform and these are provided as
codebases within BeeKit.
2.2 Features
The TWR-KW2xDxxx development platform is built around Freescale’s concept of a standalone Tower
System Modular Development Platform that contains either the MKW21D256 device or the
MKW24D512 device and all necessary I/O connections for use as a self-contained board or for connection
to an application, but also has the capability to connect with the Tower System.
Figure 2-1 shows the TWR-KW2xDxxx development platform:
Figure 2-1. TWR-KW2XDXXX Development Platform
The TWR-KW2xDxxx development platform includes the following Features:
• Freescale’s low-power MKW21D256 or MKW24D512 SIP ZigBee™ platform device
• Fully compliant IEEE 802.15.4 Standard 2006 transceiver supports 250 kbps O-QPSK data in 5.0
MHz channels and full spread-spectrum encode and decode.
• Full IEEE 802.15.4 compliant wireless node; ZigBee capable with Freescale’s BeeStack software
stack.