Information in this document is provided solely to enable system and software implementers to use
Freescale Semiconductor products. There are no express or implied copyright licenses granted
hereunder to design or fabricate any integrated circuits or int egrated circuits based on the informa tion
in this document.
Freescale Semiconductor reserves the right to make changes without furt her notice to any product s
herein. Freescale Semiconductor makes no warranty, representation or guarantee regarding the
suitability of its products for any particular purpose, nor does Freescale Semiconductor assume any
liability arising out of the application or use of any product or circuit, and specifically disclaims any
and all liability, including without limitation consequential or incident al damages. “Typical” parameters
that may be provided in Freescale Semiconductor data sheet s and/or specifications can and do vary
in different applications and actual performance may vary over time. All operating parameters,
including “Typicals”, must be vali dated for each customer application by customer’s technical
experts. Freescale Semiconductor does not convey any l icense und er it s paten t rights no r the right s
of others. Freescale Semiconductor products are not designed, intended, or authorized for use as
components in systems intended for surgical implant into the body, or other applications intended to
support or sustain life, or for any other applicatio n in which the failure of the Freescale Semiconductor
product could create a situation where personal injury or death may occur. Should Buyer purchase
or use Freescale Semiconductor products for any such unintended or unauthorized application,
Buyer shall indemnify and hold Freescale Semiconductor and its officers, employees, subsidiaries,
affiliates, and distributors harmless against all claims, costs, damages, and expenses, and
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Semiconductor was negligent regarding the design or manufacture of the part.
Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other
product or service names are the property of their respective owners.
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
Smart Energy and Commercial Building Automation. This product is a cost-effective solution that matches
or exceeds competitive solutions.
Audience
This manual is intended for system designers.
Organization
This document is organized into the following chapters.
Chapter 1Safety Information — Highlights some of the FCC requirements.
Chapter 2TWR-KW2xDxxx Development Platform Overview and Description — Provides
an overview of the boards that comprise the TWR-KW2xDxxx development
platform.
Chapter 3TWR-KW2xDxxx — This chapter details the TWR-KW21D256 and
TWR-KW24D512 evaluation boards.
Chapter 4PCB 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
LocationRevision
Entire documentFirst public release
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Definitions, Acronyms, and Abbreviations
The following list defines the acronyms and abbreviations used in this document.
ADCAnalog to Digital Converter
AESAdvanced Encryption Standard
CTSClear to Send
DACDigital to Analog Converter
I2CInter-Integrated Circuit is a multi-master serial computer bus
ISMIndustrial Scientific Medical 2.4 GHz radio frequency band
JTAGJoint Test Action Group
LGALand Grid Array
MACMedia Access Controller
MCUMicrocontroller Unit
PCBPrinted circuit board
PiPPlatform in Package
PWMPulse-width modulation
RCMRemote Control Module
REMRemote Extender Board
RTSRequest to Send
SMA ConnectorSubMiniature version “A” connector
SoCSystem on Chip
SPISerial Peripheral Interface
SSISynchronous Serial Interface
TACT SwitchA switch that provides a slight “snap” or “click” to the user to indicate function.
TELCOTelephone Company
TWRTower System
USBUniversal Serial Bus
VCPVirtual Com Port
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Page 7
Chapter 1
Safety Information
1.1FCC 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.
1.1.1Labeling
FCC labels are physically located on the back of the board.
1.1.2Operating 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.
1.1.3Exposure 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.
1.1.4Antenna 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
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Safety Information
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.
1.2Regulatory 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.
1.2.126 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.
1.3Electrostatic 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
1.4Disposal 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
2.1Introduction
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
a standalone, with a software stack to implement an IEEE 802.15.4 Standard platform solution. 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
a standalone, with a software stack to implement an IEEE 802.15.4 Standard platform solution. 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.
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TWR-KW2xDxxx Development Platform Overview and Description
— 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 T ype 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 Toolki t (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.
2.2Features
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 BeeS tack software
stack.
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TWR-KW2xDxxx Development Platform Overview and Description
•Reference design area with small footprint, low cost RF node
— Differential input/output port used with external balun for single port operation
— Low external component count
— Programmable output power from –30 dBm to +8 dBm at the SMA connector.
— Receiver sensitivity: –100 dBm, typical (@1% PER for 20 byte payload packet) at the SMA
connector
•Integrated PCB inverted F-type antenna and SMA RF port
•Selectable power sources
•32 MHz reference oscillator
•32 kHz reference oscillator
•Pre-certified 2.4 GHz frequency band of operation (ISM)
•Programmable frequency clock output (CLK_OUT)
•External Serial flash for Over-the-air Programming (OTP) support
•General purpose TWRPI connector
•Interfaces:
— SPI, UART, and I2C interface configurations
— ADC and GPIO configurations
•Integrated open-standard serial and debug interface (OpenSDA)
•Supports full speed USB 2.0 (TWR-KW24D512 only)
•Cortex 20-pin (0.05”) JTAG debug port for target MCU
•Cortex 10-pin (0.05”) JTAG port for OpenSDA updates
•4 blue LED indicators
•4 push button switches
Figure 2-2 shows a simplified block diagram of the Freescale TWR-KW2XDXXX system.
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TWR-KW2xDxxx Development Platform Overview and Description
Figure 2-2. Simplified TWR-KW2xDxxx Block Diagram
2.3Software and Driver Considerations
It is a good idea to install the BeeKit Wireless Connectivity Toolkit package found under Software and
Tools at the following URL before proceeding to use the TWR boards:
•www.freescale.com\zigbee
When users first connect a TWR-KW2xDxxx based platform to a PC, they may be prompted to install
drivers. If BeeKit is installed and this occurs, do not allow Windows to automatically search for and install
the drivers. Instead, select manual installation and steer Windows to the following directory:
C:\Program Files\Freescale\Drivers
Follow the instructions as they appear on the screen to complete driver installation.
NOTE
If installing the BeeKit software package to another drive or directory,
indicate the Drivers directory created by the installer in the custom location
where BeeKit was installed.
If BeeKit is not installed, note the following:
•The boards use the OpenSDA to USB converter, Virtual COM Port (VCP) driver for Windows.
•Download the appropriate driver and follow the instructions to complete driver installation.
— www.pemicro.com/opensda and download the Windows USB Drivers
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Chapter 3
TWR-KW2xDxxx
3.1TWR-KW2xDxxx Overview
The TWR-KW2xDxxx is an evaluation board based on the Freescale MKW2xDxxx device. The
TWR-KW2xDxxx provides a platform to evaluate the TWR-KW2xDxxx SIP IC, develop software and
applications. The core device is accompanied by the 32 MHz reference oscillator crystal, RF circuitry
including PCB F-type antenna (or SMA), and supporting circuitry.
This basic board is intended as the core PCB for TWR-KW2xDxxx evaluation and application
development and can be used in the following modes:
•Simple standalone evaluation platform
•Daughtercard to other Development Platform boards (Tower System)
•Mothercard to an application specific dauhtercard, could be a TWRPI card.
3.1.1PCB Board Features
The TWR-KW2xDxxx provides the following features:
•Freescale’s Tower System form factor
•4-Layer metal, 0.062 inch thick FR4 board
•LGA footprint and power supply bypass
•Printed metal F-Antenna (and SMA)
•32 MHz reference oscillator crystal
•32.768 kHz crystal provided for optional timing oscillator.
•Standard Tower TWRPI daughter card mounting interface
— 20-Pin primary connector
— 20-Pin secondary connector
— Can provide main supply voltage to board
3.1.2Form Factor
Figure 3-1 shows the TWR-KW2xDxxx connector and header locations.
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TWR-KW2xDxxx
Figure 3-1. TWR-KW2xDxxx Connector and Header Details
The TWR-KW2xDxxx incorporates the following general headers.
Headers J9 and J10:
•Both headers have standard 0.05in / 1.27 mm pin spacing
•J9 and J10 are 20-pin
•Both are pin headers mounted on the T op side of the board and are intended to plug into matching
receptacles on the TWRPI standard.
Headers J17 and J18:
•Both headers have standard 0.10in / 2.54 mm pin spacing
•J17 and J18 are 3x4-pin
•Both are pin headers mounted on the Top side of the board and are intended to have the capability
for SPI/TWR_Elevator Selector (J17) and UART1/TWR_Elevator Selector (J18).
Headers J19, J20, J21, and J24:
•Headers have standard 0.10in / 2.54 mm pin spacing
•J19, J20, J21, and J24 are 3-pin
•19, J20, J21, and J24 are pin headers mounted on the Top side of the board and are intended to
select between UART0/LED.
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Figure 3-2 shows a footprint of the TWR-KW2xDxxx with the location of the IO Headers.
TWR-KW2xDxxx
Figure 3-2. TWR-KW2xDxxx T op Side (Component Side) Footprint
3.1.3Board Level Specifications
Table 3-1. TWR-KW2xDxxx Specifications
ParameterUnitsNotes/Conditions
MINTYPMAX
General
Size (PCB: X, Y)90 x 80.6
3.54 x 3.175mminches
Layer build (PCB)1.57
0.062
Dielectric material (PCB)FR4
Power
Current consumption
Transmit
Receive
18
20
18
20
mm
inches
mA
4-Layer
*Board level measured at J2.
Radio TX (Nominal power)
MCU
Radio RX mode
MCU
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RF Power Output -32+10dBm Programmable in 2dB steps
2nd harmonic<-50<-40dBm Measured with output power set to nominal
(0 dBm) and temperature @ 25°C. Trap filter
is needed.
3rd harmonic<-50<-40dBmMeasured with output power set to nominal
(0 dBm) and temperature @ 25°C. Trap filter
is needed.
Regulatory Approval
FCCProduct is approved accordingly to the FCC
part 15 standard
CE (ETSI)Product is approved accordingly to the EN
300 328 V1.7.1 (2006-10) standard
CE (EMC)Product is approved accordingly to the EN
301 489-1 V1.6.1 (2005-09) and EN 301
489-17 V1.2.1 (2002-08) standards
Safety
ULProduct is approved accordingly to the IEC
Environment
RoHSProduct complies with the EU Directive
WEEEProduct complies with the EU Directive
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3-4Freescale Semiconductor
60950-1 and EN 60950-1, First Edition
standards
2002/95/EC of 27 January 2003
2002/95/EC of 27 January 2003
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TWR-KW2xDxxx
3.2Functional Description
The TWR-KW2xDxxx is built around Freescale’ s MKW2XDXXX 56-pin LGA platform and is intended
as a simple evaluation platform and as a building block for application development. The 4-layer board
provides the MKW2XDXXX with its required RF circuitry , 32 MHz reference oscillator crystal and power
supply bypassing. The layout for this base level functionality can be used as a reference layout by the user
target board.
3.2.1RF Performance and Considerations
TWR-KW2xDxxx transceiver includes a 1mW nominal output power, PA with internal voltage controlled
oscillator (VCO), integrated transmit/receive switch, on-board power supply regulation, and full
spread-spectrum encoding and decoding. Key specifications for MKW2XDXXX are:
•Nominal output power is 0 dBm, with +10 dBm max
•Programmable output power from –30 dBm to +10 dBm (measured at the package pin)
•Frequency range is 2360 to 2480 MHz (Includes both ISM and MBAN bands)
•Receiver sensitivity: –102 dBm, typical (@1% PER for 20 byte payload packet, measured at the
package pin)
•Differential bidirectional RF input/output port with integrated transmit/receive switch
The TWR-KW2xDxxx utilizes a minimum number of components while providing good RF performance:
•Uses a minimum number of RF marching components and external 50:50 balun.
•“F” printed metal antenna for a small footprint, low cost design.
An external 50 (unbal): 50(bal) balun connects a single-ended 50-ohm port to the differential RF port of
the MKW2XDXXX radio. The layout has provision for out-of-band signal suppression (components L5
and C19) if required.
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Figure 3-3. TWR-KW2xDxxx RF Circuitry
Page 18
TWR-KW2xDxxx
3.2.2Clocks
The TWR-KW2xDxxx provides two clocks:
•32 MHz Reference Oscillator - Figure 3-4 shows the external 32 MHz external crystal Y1. This
mounted crystal must meet the MKW2XDXXX specifications. The IEEE 802.15.4 Standard
requires that the frequency be accurate to less that +/-40 ppm.
— Capacitors C21 and C22 provide the bulk of the crystal load capacitance. Onboard trim
capacitors can be programmed to center the frequency. At 25°C, it is desired to have the
frequency accurate to +/-10 ppm or less to allow for temperature variation.
— To measure the 32 MHz oscillator frequency, signal CLK_OUT (PTA18) can optionally be
programmed to provide a buffered output clock signal
— The TWR-KW2xDxxx has provision for injecting an external 32 MHz clock source as an
alternative to use of the onboard crystal:
– The crystal Y1 should be removed
– C20 must be mounted
– The ex ternal 32 MHz source is connected to 2-pin header J5; the frequency accuracy of the
external source must meet the +/-40 ppm of the IEEE 802.15.4
Figure 3-4. 32 MHz Reference Oscillator Circuit
•Optional 32.768 kHz Crystal Oscillator - Provision is also made for a secondary 32.768 kHz crystal
Y2 as shown in Figure 3-5. This oscillator can be used for a low power accurate time base.
— The module comes provided with the 32.768 kHz crystal.
— Load capacitors C23 and C24 provide the entire crystal load capacitance; there is no onboard
trim capacitance.
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The TWR-KW2xDxxx power management circuit is shown in Figure 3-6.
TWR-KW2xDxxx
Figure 3-6. TWR-KW2xDxxx Power Management Circuit
The TWR-KW2xDxxx has the flexibility to be powered in several configurations:
•Board can be supplied through the mini USB type B connector (J15) which provides P5V_USB to
J1 1-2.
•Board can be supplied through the micro USB AB (J6) (TWR-KW24D512 only) providing
P5V_KW24_USB to J27 1-2 and VOUT33 to J3 2-3.
•Board can be supplied through the TWR System Elevator headers which provides either
3.3V_ELEV or 5V_ELEV to header J1 3-4 or J1 5-6 respectively.
•Board can be supplied from an external DC supply in the following ways:
— Connect an USB battery adaptor capable of suppling 1.8 to 5.5 VDC to the micro USB AB (J6)
(TWR-KW24D512 only)
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TWR-KW2xDxxx
— An external unregulated supply up to 5.5VDC can be supplied to V_EXT header J28 making
use of the onboard 3.3 V LDO regulator
Header J2 provides the means to supply either the MCU, the radio and LED circuits. Current
measurements can be made by inserting a current meter in place of a designated jumper. Connections
configurations are described in Table 3-2.
Table 3-2. Power Distribution Header J2
Supply
Designation
V_LED1 - 2Supply voltage to power indicator LED
V_MCU3 - 4Supply voltage to MKW2xDxxx
V_RF5 - 6Supply voltage to MKW2xDxxx
Header
Pins
Description
• Normally jumpered
• Jumper used to enable LEDs on board
• Leave open for lowest power
• Usage: Measure LED current
• Normally jumpered
• Supplies only the MKW2xDxxx MCU
• Usage: Measure or supply MCU current
• Normally jumpered
• Supplies only the MKW2xDxxx transceiver
• Usage: Measure or supply radio current
3.2.4TWR-KW2xDxxx Peripheral Functions
The TWR-KW2xDxxx includes the TWRPI general purpose peripheral function to assist in implementing
targeted applications. The TWR-KW2xDxxx board also has alternate port functions routed to the elevator
interface where off board tower system peripherals can be used if desired.
3.2.4.1Serial FLASH (SPI Interface)
Component U13 is an AT45DB161E-SSHD 16 Mbit (2 Mbyte) serial Flash memory with SPI interface.
The memory is useful for over-the-air programming (OTAP) and for storage of non-volatile system data
or parameters. Figure 3-7 shows the memory circuit.
•Memory power supply is V_MCU
•Discrete pullup resistors for the SPI port are provided
•The SPI can be shared with another peripheral with the TWRPI J10 connector — an additional IO
signal would be required as a chip enable (CS or SS) for the peripheral. The normal SPI_SS and
the second chip select should NOT be active at the same time.
•The SPI Write Protect and Reset signals have discrete pullup resistors for control if required. The
resistors are DNP.
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TWR-KW2xDxxx
Figure 3-7. AT45DB161E-SSHD 16Mbit Serial FLASH memory
3.2.4.2TWRPI Connectors J9 and J10
The two connectors J9 and J10 are 50 mil pin headers mounted on the front (component side) supporting
the standard TWRPI general purpose connector. The primary header J9 and secondary header J10 are
20-pin and mounted physically in such a manner as to prevent reverse insertion of any TWRPI card into
the motherboard receptacle (see Figure 3-1., “TWR-KW2xDxxx Connector and Header Details”).
•V_MCU provides the TWRPI connector its supply voltage
— Depending on power supply configuration, this voltage may supply the TWRPI card from the
TWR-KW2xDxxx. See Section 3.2.3, “Power Management”.
— Peripherals IO to the TWR-KW2xDxxx and the TWRPI card supply should use this same
voltage avoiding potential damage.
The pin definitions for the primary header J9 and the secondary header J10 are shown in Table 3-3.,
9PTB17_TWRPISPI:MISO Master Input Slave Output
10PTB16_TWRPISPI:MOSI Master Output Slave Input
11PTB10_TWRPISPI: SS Slave Select
12PTB11_TWRPISPI:CLK R_SClock
13GNDBoard ground
14GNDBoard ground
15GPIO1GPIO: GPIO0/IRQ
16GPIO2GPIO; GPIO1/IRQ
17PTE17/UART2_RXUART_RX or GPIO2
18PTE16/UART2_TXUART_TX or GPIO3
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Table 3-4. TWRPI 20 Pin Secondary Connector
TWR-KW2xDxxx
Header Pin
Number
19PTE18/UART2_CTSU ART_CTS or GPIO4/TIMER
20PTE19/UAR T2_RTSUART_RTS or GPIO5/TIMER
TWR-KW24D512 Pin NameDescription
3.2.4.3Jumper Connectors
The TWR-KW2xDxxx development platform incorporates several headers which allow different MCU
port configurations assisting in the implementation of target applications. (see Figure 3-1.,
“TWR-KW2xDxxx Connector and Header Details”).
•SPI0 TWRPI / TWR_ELEV Select (J17).
— The TWR-KW2xDxxx has the capability to support a SPI for TWRPI boards - to configure,
shunt J17 pin 2-3 (SPI0_PCS), pin 5-6 (SPI0_SCK), 8-9 (SPI0_MOSI), and pin 11-12
(SPI0_MISO). See Figure 3-8., “TWR-KW24D512 Schematic”.
— The TWR-KW2xDxxx has the capability to support a TWR_ELEV with another TWR System
- to configure, shunt J17 pin 1-2 (SPI0_PCS), pin 4-5 (SPI0_SCK), 7-8 (SPI0_MOSI), and pin
10-11 (SPI0_MISO). See Figure 3-8., “TWR-KW24D512 Schematic”.
•UART1 / ADC TWRPI Select (J18).
— The TWR-KW2xDxxx has the capability to support a ADC for TWRPI boards - to configure,
shunt J18 pin 2-3 (ADC0_DM1), pin 5-6 (ADC0_DP1), 8-9 (ADC0_SE11), and pin 11-12
(ADC_SE10). See Figure 3-8., “TWR-KW24D512 Schematic”.
— The TWR-KW2xDxxx has the capability to support an UART1 connection trough
TWR_ELEV with another TWR System - to configure, shunt J17 pin 1-2 (UART1_TX), pin
4-5 (UART1_RX), 7-8 (UART1_CTS), and pin 10-11 (UART1_RTS). See Figure 3-8.
•UART0 / LED Select (J19/ J20/ J21/ J24).
— The TWR-KW2xDxxx has the capability to support the Blue LEDs on board - to configure,
— The TWR-KW2xDxxx has the capability to support an UART0 connection trough
TWR_ELEV with another TWR System - to configure, shunt J19 pin 1-2 (UAR T0_RTS), J20
pin 1-2 (UART0_CTS), J21 pin 1-2 (UART0_Rx), and J24 pin 1-2 (UART0_TX). See
Figure 3-8., “TWR-KW24D512 Schematic”.
3.2.4.4MKW24D512 USB Supply (J6) - TWR-MK24D512 Board Only
The MKW2xDxxx device has an on-board USB port which is configured to provide both power and serial
communication with the target MCU. (see Figure 3-1., “TWR-KW2xDxxx Connector and Header
Details”). The following jumpers allow the USB functionality:
•USB Select - Micro USB AB (J6).
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
Freescale Semiconductor3-11
Page 24
TWR-KW2xDxxx
— Shunt J27 to supply 5VDC to the MKW2xDxxx device (U3 pin 24, VREGIN) through the
Micro USB AB connector, This supplies the on-board USB regulator with then provides 3.3
VDC supply (U3 pin 23, VOUT33). See Figure 3-8., “TWR-KW24D512 Schematic”.
— Shunt J3 2-3 to supply power to the MKW2xDxxx device. See Figure 3-8., “TWR-KW24D512
Schematic”.
3.2.4.5MKW21D256 (Non-USB) UART2 Support - TWR-MK21D256 Board Only
The MKW21D256 device does not support the USB interface and instead makes use of UART2 port
functionality . In this case, resistors are placed configuring UART2 use for both the TWRPI connector and
TWR elevator interface. (see Figure 3-1., “TWR-KW2xDxxx Connector and Header Details”).
•UART2/Non USB Select
— J27 is open, shunt J3 1-2, supply voltage required though power management configuration.
See Figure 3-8., “TWR-KW24D512 Schematic”, and Section 3.2.3, “Power Management”.
— The following resistors are placed: R84, R85, R86 and R87, keep as DNP, C27 and C28. See
Figure 3-8., “TWR-KW24D512 Schematic”.
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
3.3V BUCK/BOOST REGULATOR
TO USE TPS63000,
REPLACE RESISTORS WITH
THE FOLLOWING VALUES:
R1 = 100 OHM, R2 = 1.24M
AND POPULATE R5.
OUTPUT VOLTAGE WILL BE 3.6V
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
Freescale Semiconductor3-23
Page 36
TWR-KW2xDxxx
Table 3-5. Bill of Materials (Common parts for all frequency bands) (Sheet 5 of 6)
Item Qty ReferenceValueDescriptionMfg. NameMfg. Part Number
7024 TP1,TP2,T
P3,TP4,TP
TPAD_040TEST POINT PAD 40MIL DIA SMT ,
NO PART TO ORDER
5,TP6,TP7,
TP9,TP10,
TP11,TP12
,TP14,TP1
5,TP16,TP
17,TP21,T
P22,TP27,
TP104,TP5
00,TP501,
TP502,TP5
04,TP506
7113 TP100,TP1
01,TP102,
TPAD_030TEST POINT PAD 30MIL DIA SMT ,
NO PART TO ORDER
TP103,TP1
05,TP106,
TP107,TP1
08,TP508,
TP509,TP5
10,TP511,T
P512
721U1TPS63001IC LIN DCDC SYNC 3.3V
OUTPUT 1250-1800KHZ 1.8-5.5V
QFN-10
TEXAS
INSTRUMENTS
TPS63001DRCT
731U3
for
TWR-KW24D5
12
731U3
for
TWR-KW21D2
56
MKW24D512IC MCU XCVR 2.4GHZ 64KB RAM
512KB FLASH - USB 1.8-3.6V
LGA56
MKW21D256IC MCU XCVR 2.4GHZ 64KB RAM
256KB FLASH - USB 1.8-3.6V
LGA56
741U474LVC125ADBIC BUF QUAD TS 1.2-3.6V
SSOP14
751U6PK20DX128
VFM5
761U7MIC2005-0.
8YM6
771U8GSOT05C-
IC MCU FLASH 128KB 50MHZ
1.71-3.6V QFN32
IC LIN SW PWR 0.8A 2.5-5.5V
SOT23-6
DIODE ESD 2LINE 5V SOT23VISHAY
GS08
783U10,U11,U120402ESDA-
DIODE TVS BIDIR -- 30V 0402COOPER
MLP
791Y132MHZXTAL 32MHZ 9PF -- SMT
3.2X2.5MM
801Y232.768KHZXTAL 32.768KHZ SMT ROHS
COMPLIANT
FREESCALE
MKW24D512VHA5
SEMICONDUCTOR
FREESCALE
MKW21D256VHA5
SEMICONDUCTOR
NXP
74LVC125ADB
SEMICONDUCTORS
FREESCALE
MK20DX128VFM5
SEMICONDUCTOR
MICRELMIC2005-0.8YM6
GSOT05C-GS08
INTERTECHNOLOGY
0402ESDA-MLP1
BUSSMANN
NDKEXS00A-CS02368
EPSON
FC-135 32.7680KA-A3
ELECTRONICS
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
3-24Freescale Semiconductor
Page 37
TWR-KW2xDxxx
Table 3-5. Bill of Materials (Common parts for all frequency bands) (Sheet 6 of 6)
Item Qty ReferenceValueDescriptionMfg. NameMfg. Part Number
811Y38MHZXTAL 8MHZ 20PPM PAR 18PF
ESR 200OHM SMT
811Y8MHZXTAL 8MHZ 20PPM PAR 18PF
ESR 200OHM SMT
821Z12400MHz
50OHM
833TL1, TL2,
TESTLOOP TEST POINT PAD SIZE 3.4MM X
TL3
843TP25,TP26
,TP507
TESTLOOP
_BLACK
851U13AT45DB161
E-SSHD
XFMR BALUN 2400 +/-100MHZ
SMT
1.8MM SMT
TEST POINT PC MULTI
PURPOSE BLK TH
IC FLASH 16MBIT 85MHZ
2.5-3.6V SOIC8
861U14TXS0101IC VXLTR 1BIT 1.65-3.6V/2.3-5.5V
SOT23-6
Abracon CorporationABM3B-8.000MHZ -B2
-T
Abracon CorporationABM3B-8.000MHZ -B2
-T
MURATALDB212G4005C-001
KEYSTONE
5015
ELECTRONICS
KEYSTONE
5011
ELECTRONICS
ATMELAT45DB161E-SSHD-T
TEXAS
TXS0101DBVR
INSTRUMENTS
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
3-25Freescale Semiconductor
Page 38
TWR-KW2xDxxx
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
Freescale Semiconductor3-26
Page 39
Chapter 4
PCB Manufacturing Specifications
This chapter provides the specifications used to manufacture the TWR-KW2xDxxx Development
hardware printed circuit board (PCB) described in this manual.
The TWR-KW2xDxxx Development hardware PCBs must comply with the following:
•The PCB must comply with Perfag10/3C (http://www.perfag.dk/Uk/ukindex.htm)
•The PCB manufacturer’s logo is required
•The PCB production week and year code is required
— The manufacturer’s logo and week/year code must be stamped on the back of the PCB solder
mask
— The PCB manufacturer can not insert text on the PCB either in copper or in silkscreen without
written permission from Freescale Semiconductor, Inc.
•The required Underwriter’s Laboratory (UL) Flammability Rating
— The level is 94V-0 (http://www.ul.com/plastics/flame.html)
— The UL information must be stamped on the back of the PCB solder mask
NOTE
•A complete set of design files is available for the TWR-KW2xDxxx
Development hardware at the Freescale web site
(http:www.freescale.com/zigbee) under reference designs. It is
recommended that this design or one of a number of other reference
designs be used as a starting point for a custom application.
•The Freescale IEEE 802.15.4 / ZigBee Package and Hardware Layout Considerations Reference Manual, (ZHDCRM) is also available at the
same web site to provide additional design guidance.
4.1Single PCB Construction
This section describes individual PCB construction details.
•The TWR-KW2xDxxx PCB is a four-layer, multi layer designs
•The PCBs contains no blind, buried, or micro vias
•PCB data:
— TWR-KW2xDxxx Size: Approximately 90 x 83mm (3.55 x 3.28inches)
— TWR-KW2xDxxx Final thickness (Cu/Cu): 1.57 mm (0.62 inches) +/- 10% (excluding solder
mask)
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
Freescale Semiconductor4-1
Page 40
PCB Manufacturing Specifications
The following table defines some of the layers of the completed PCB. The artwork identification refers to
the name of the layer in commonly used terms.
The TWR-KW2xDxxx contains high frequency 2.4 GHz RF circuitry . As a
result, RF component placement, line geometries and layout, and spacing to
the ground plane are critical parameters. As a result, BOARD STACKUP
GEOMETR Y IS CRITICAL. Dielectric and copper thicknesses and spacing
must not be changed; follow the stackup (see Figure 4-1) information is
provided with the reference design.
The panel size can be negotiated depending on production volume.
4.3Materials
The PCB composite materials must meet the following requirements:
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
4-2Freescale Semiconductor
Page 41
PCB Manufacturing Specifications
•Laminate - The base laminate material (laminate) must be FR4. If the laminate material were
changed the RF electrical characteristics may change and degrade RF performance.
•Copper Foil — Top and Bottom copper layers must be 1 oz. copper
— Interior layers must be 1oz. copper
•Plating - All pad plating must be Hot Air Levelling (HAL)
4.4Solder Mask
The solder mask must meet the following requirements:
•Solder mask type: Liquid Film Electra EMP110 or equivalent
•Solder mask thickness: 10 – 30 µm
4.5Silk Screen
The silk screen must meet the following requirements:
•Silkscreen color: White
•Silkscreen must be applied after application of solder mask if solder mask is required
•The silkscreen ink must not extend into any plated-thru-holes
•The silk screen must be clipped back to the line of resistance
4.6Electrical PCB Testing
•All PCBs must be 100 percent tested for opens and shorts
•Impedance Measurement - An impedance measurement report is not mandatory
4.7Packaging
Packaging for the PCBs must be the following requirements:
•Finished PCBs must remain in panel
•Finished PCBs must be packed in plastic bags that do not contain silicones or sulphur materials.
These materials can degrade solderability.
4.8Hole Specification/Tool Table
See the ncdrill-1-4.tap file included with the Gerber files and the FAB-27694.pdf file.
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
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PCB Manufacturing Specifications
4.9File Description
Files included with the download include Design, Gerber and PDF files.
Gerber files are RS-274x format. Not all files included with the Gerber files are for PCB manufacturing.
PDF files included are:
•FAB-27694.pdf — Board fabrication drawing
•GRB-27694.zip — Metal layers, solder mask, solder paste and silk screen
•SPF-27694.pdf — Schematic
Design files are in Allegro format with OrCAD schematic capture.
T ower KW2xDxxx Hardware Reference Manual, Rev. 0.2
4-4Freescale Semiconductor
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