Freescale Semiconductor Kinetis K40 MCUs User manual

Kinetis K40 MCUs
Quick Start Guide
Low-power MCU with
USB and segment LCD
Tower System
Development Board
Platform

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freescale.comQuick Start Guide
Get to Know the TWR-K40X256
Primary
Connector
Infra-Red
General Purpose
Tower Plug-In
(TWRPI) Socket
SW5 (Reset)
Power/OSJTAG
Mini-B USB
Connector
Secondary
Connector
SW3
SW4
Touch/SLCD
TWRPI Socket
LED/Touch
Buttons
E1–E4
MK40X256
VMD100
Microcontroller
MMA7660
Accelerometer
Figure 1: Front Side of TWR-K40X256 Board Not Including TWRPI
TWR-K40X256
The TWR-K40X256 controller board is part of the Freescale
Tower System, a development board platform that enables rapid
prototyping and tool re-use through reconfigurable hardware. Take
your design to the next level and begin constructing your Tower
System rapid prototyping platform today by visiting freescale.
com/Tower for additional Tower System controller boards and
compatible peripherals.
SD Card Socket
VBAT (RTC)
Battery Holder
Potentiometer
Figure 2: Front Side of TWR-K40X256 Board
with TWRPI-SLCD Attached
Figure 3: Back Side of
TWR-K40X256 Board

4 5
Step-by-Step Installation
Instructions (cont.)
freescale.comQuick Start Guide
5Explore Further by
Conducting Lab 1:
TWR-K40X256
Quick Start Demo
Explore all the features and capabilities
of the pre-programmed demo by reviewing
the lab document located at
freescale.com/TWR-K40X256.
6Learn More
About the Kinetis
K40 Microcontrollers
Find more MQX
™
RTOS and bare-metal
labs and software for the Kinetis
K40 microcontrollers at
freescale.com/TWR-K40X256.
Step-by-Step
Installation Instructions
Tilt the board side to side to see the LEDs
on E1–E4 light up as it is tilted.
Navigate the
4Segment LCD
The Segment LCD will come up displaying
the seconds elapsed since boot-up.
Press SW4 to toggle between viewing the
seconds, hours, minutes, potentiometer
percent and temperature.
1Install 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.
2Configure the
Hardware
Install the included battery into the VBAT
(RTC) battery holder. Then, plug in the
included Segment LCD Tower Plug-In
(TWRPI-SLCD) into the Touch/SLCD
TWRPI socket. Finally, connect one end of
the USB cable to the PC and the other end
to the Power/OSJTAG mini-B connector on
the TWR-K40X256 module. Allow the PC
to automatically configure the USB drivers
if needed.
3Tilt the
Board
In this Quick Start Guide, you will learn how to set up the TWR-K40X256 board and run
the default demonstration.

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freescale.comQuick Start Guide
Jumper Option Setting Description
J11 MCU Power
Connection
ON Connect on-board 3.3 V supply to MCU
OFF Isolate MCU from power (connect an ammeter to measure current)
J12 VBAT Power
Selection
1-2 Connect VBAT to on-board 3.3 V supply
2-3 Connect VBAT to the higher voltage between on-board 3.3 V supply
or coin-cell supply
J13
OSJTAG
Bootloader
Selection
ON OSJTAG bootloader mode (OSJTAG firmware reprogramming)
OFF Debugger mode
J15
JTAG Board
Power
Connection
ON Connect on-board 5 V supply to JTAG port (supports powering
board from JTAG pod supporting 5 V supply output)
OFF Disconnect on-board 5 V supply to JTAG port
J6 IR Transmitter
Connection
ON Connect PTD7/CMT_IRO to IR Transmitter (D3)
OFF Disconnect PTD7/CMT_IRO from IR Transmitter (D3)
J3
VREGIN
Power
Connection
ON Connect USB0_VBUS from Elevator to VREGIN
OFF Disconnect USB0_VBUS from Elevator to VREGIN
J5
FlexBus
Address Latch
Selection
1-2 FlexBus address latch disabled
2-3 FlexBus address latch enabled
Jumper Options
The following is a list of all the jumper options. The default installed jumper settings are
shown in the shaded boxes.

To learn more about the TWR-K40X256 and other
Freescale Kinetis microcontroller products, visit
freescale.com/TWR-K40X256,
freescale.com/Kinetis and freescale.com/Tower
For more information, visit freescale.com
Freescale, the Freescale logo and Kinetis are trademarks of Freescale
Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. Tower is a trademark of
Freescale Semiconductor, Inc. All other product or service names are the
property of their respective owners.
© 2010, 2014 Freescale Semiconductor, Inc.
Doc Number: TWRK40QSG REV 3 Agile Number: 926-78534 REV D
Get Started
Download installation software and documentation under
“Jump Start Your Design” at freescale.com/TWR-K40X256.
Support
Visit freescale.com/support for a list of phone
numbers within your region.
Warranty
Visit freescale.com/warranty for complete
warranty information.