Freescale Semiconductor TWR-K20D72M User manual

Quick Start Guide
TWR-K20D72M
Low-Power 32-bit ARM®Cortex™-M4 MCUs with
High-Precision Analog, Connectivity and Scalability
TOWER SYSTEM

2
Quick Start Guide
Get to Know the TWR-K20D72M
Primary
Connector
Infra Red
MicroUSB
Connector
Microphone
Power/OSJTAG
MiniB USB
Connector
JTAG
Connector
Secondary
Connector
General Purpose
Touch Plug-In
Socket (TWRPI)
Potentiometer
SW2
SW1
Touch TWRPI
Socket
TSI Electrodes
Board Power
Selector
SW3/Reset
Figure 1: Front side of TWR-K20D72M module.

TOWER SYSTEM
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TWR-K20D72M
Freescale Tower System
The TWR-K20D72M MCU module is designed to work either in stand-alone
mode or as part of the Freescale Tower System, a modular development platform
that enables rapid prototyping and tool re-use through reconfigurable hardware.
Begin constructing your Tower System today by visiting freescale.com/Tower for
additional Tower System MCU modules and compatible peripherals.
Figure 2: Back side of TWR-K20D72M module.
Accelerometer
VBAT (RTC)
Battery
Holder
Buzzer

TWR-K20D72M Features
• MK20DX256VLL7MCU(72MHz,256KBflash,64KBRAM,32KBFlexNVM,
low power, 100 LQFP package)
• USBsupportwithMicroUSBconnectoronboard,noKITneededfordualrole
USB feature evaluation
• Twocapacitivetouchpads
• Socketforcapacitivetouchpaddaughterboard(TouchTWRPI)
• SocketforTowerplug-in(TWRPI,e.g.sensorboard)
• Three-axisdigitalaccelerometer(MMA8451Q)
• Potentiometer,fourLEDs,pushbuttons,infraredportandbatteryholder
• Microphoneandbuzzer
• On-boarddebugcircuitMC9S08JM60opensourceJTAG(OSJTAG)
with virtual serial port
Quick Start Guide
4

TOWER SYSTEM
5
Step-by-StepInstallationInstructions
Install the
Software and Tools
InstalltheP&EMicroKinetisTower
toolkittoinstalltheOSJTAGand
USB-to-Serial drivers. These can be
foundontheDVDunder“Software.”
Configure the Hardware
Connect one end of the USB cable
to the PC and the other end to the
Power/OSJTAGmini-Bconnector
on the TWR-K20D72M module.
Allow the PC to automatically
configure the USB drivers if needed.
Press Touch Electrodes
A different tone will beep when either
electrode1 or electrode2 is pressed
andtheassociatedLEDwillturnon.
Tilt the Board
The board will generate a different
tone depending on the tilt angle.
Whistle into the
Microphone
The board will respond with a tone.
Learn More about the
Kinetis 72 MHz Family
Find more bare-metal labs
and software for the
Kinetis K20 MCUs at
freescale.com/TWR-K20D72M.
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5
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Inthisquickstartguide,youwilllearnhowtosetuptheTWR-K20D72Mmodule
and run the default demonstration.

6
Quick Start Guide
TWR- K20D72M JumperOptions
The following is a list of all the jumper options. The default installed jumper
settings are shown in white text within the red boxes.
Jumper Option Setting Description
J6 MCU power connection
ON Connect on-board 3.3V or 1.8V supply to MCU
OFF Isolate MCU from power (connect an ammeter to measure current)
J13 VBAT power selection
1-2 Connect VBAT to on-board 3.3V or 1.8V supply
2-3 Connect VBAT to the higher voltage between on-board supply or
coin cell supply
J18 3.3V VOUT selection
ON Connect USB 3.3V regulator output to MCU_PWR
OFF Disconnect USB 3.3V regulator output to MCU_PWR
J10 JTAG board power
selection
ON Connect on-board 5V supply to JTAG port (supports powering
board from JTAG pod supporting 5V supply output)
OFF Disconnect on-board 5V supply to JTAG port
J15 OSJTAG bootloader
selection
ON OSJTAG bootloader mode (OSJTAG firmware reprogramming)
OFF Debugger mode
J16 VREG IN selection
1-2 Regulator powered by OSJTAG 5V output
5-6 VBUS signal on Micro-USB connector J19 connects to VREGIN to
allow stand-alone USB operation
6-8 VBUS signal from elevator connector connects to VREGIN to allow
USB operation with complete tower kit
J17 Board power selection
1-2 K20 USB regulator 3.3V output powers VBRD (MCU_PWR)
3-5 3.3V from on-board regulator powers VBRD (MCU_PWR)
5-7 1.8V from on-board regulator powers VBRD (MCU_PWR)

TOWER SYSTEM
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Jumper Option Setting Description
J2 USB power enable
ON Connect PTC9 to USB power enable on power switch MIC2026
OFF Disconnect PTC9 to USB power enable on power switch MIC2026
J20 USB over-current flag
ON Connect PTC8 to over-current flag on power switch MIC2026
OFF Disconnect PTC8 to over-current flag on power switch MIC2026
J1 Infrared transmitter
connection
ON Connect CMT_IRO (PTD7) to infrared transmitter D1
OFF Disconnect CMT_IRO (PTD7) to infrared transmitter D1
J3 Infrared receiver
connection
ON Connect CMP0_IN1 (PTC7) to infrared receiver Q1
OFF Disconnect CMP0_IN1 (PTC7) to infrared receiver Q1
J25 Accelerometer I2C
connection
ON Connect PTB2 to SCL pin of accelerometer
OFF Disconnect PTB2 to SCL pin of accelerometer
J26 Accelerometer I2C
connection
ON Connect PTB3 to SDA pin of accelerometer
OFF Disconnect PTB3 to SDA pin of accelerometer
J24 Accelerometer IRQ
connection
ON Connect PTB0 to INT1 pin of accelerometer
OFF Disconnect PTB0 to INT1 pin of accelerometer
J23 Accelerometer IRQ
connection
ON Connect PTB1 to INT2 pin of accelerometer
OFF Disconnect PTB1 to INT2 pin of accelerometer
J27 Potentiometer
connection
ON Connect potentiometer to ADC1_DM0
OFF Disconnect potentiometer to ADC1_DM0
J4 Microphone connection
ON Connect microphone input to PTB0 (ADC0_SE8)
OFF Disconnect microphone input to PTB0 (ADC0_SE8)
J21 Buzzer connection
ON Connect FTM0_CH3 (PTC4) to buzzer
OFF Disconnect FTM0_CH3 (PTC4) to buzzer

For more information, visit freescale.com/Tower
Join the online Tower community at towergeeks.org
Freescale, the Freescale logo and CodeWarrior are trademarks of Freescale
semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. Kinetis is a trademark of
Freescale Semiconductor, Inc. All other product or service names are the
property of their respective owners. © 2012 Freescale Semiconductor, Inc.
Doc Number: TWRK20D72MQSG REV 0 Agile Number: 926-27182 REV A
Quick Start Guide
Visitfreescale.com/TWR-K20D72M or
freescale.com/Kinetis for the latest information
on the TWR-K20D72M module, including:
• Baremetallabs
• Software
• Technicaldocumentation
Support
Visitfreescale.com/support for a list of phone
numbers within your region.
Warranty
Visitfreescale.com/warranty for complete
warranty information.
Quick Start Guide

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