NXP Semiconductors TWR-KV31F120M User Manual

Freescale Semiconductor, Inc.

User’s Guide

Document Number: TWRKV31F120MUG

Rev. 0, 03/2014

TWR-KV31F120M Tower Module
User’s Guide

1 TWR-KV31F120M

The TWR-KV31F120M microcontroller module is
designed to work in standalone mode or as part of
the Freescale Tower system, a modular development
platform that enables rapid prototyping and tool
reuse through reconfigurable hardware. Take your
design to the next level and begin constructing your
Tower system today by visiting
www.freescale.com/tower for additional Tower
System microcontroller modules and compatible
peripherals.

Contents

1. TWR-KV31F120M . . . . . . . . . . . . . . . . . 1

2. Contents . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3. TWR-KV31F120M features . . . . . . . . . . . 3

4. Get to know the TWR-KV31F120M . . . . 3

5. Reference documents . . . . . . . . . . . . . . . . 4

6. Hardware description . . . . . . . . . . . . . . . . 4

6.1.Microcontroller . . . . . . . . . . . . . . . . . . 5

6.2.Clocking . . . . . . . . . . . . . . . . . . . . . . . 6

6.3.System power . . . . . . . . . . . . . . . . . . . 6

6.4.Debug interface . . . . . . . . . . . . . . . . . 6

6.5.Accelerometer plus Magnetometer . . 7

6.6.Potentiometer, pushbuttons, and LEDs 8

6.7.General Purpose Tower Plug-in (TWRPI) socket
8

7. TWR-KV31F120M jumper options and headers 9

8. Useful links . . . . . . . . . . . . . . . . . . . . . . . 11

9. Revision history . . . . . . . . . . . . . . . . . . . 12

© 2014 Freescale Semiconductor, Inc.

Contents

Figure 1. Freescale tower system overview

2Contents

The TWR-KV31F120M contents include:

• TWR-KV31F120M board assembly

• A to micro-B USB cable for debug interface and power

• Quick start guide

TWR-KV31F120M Tower Module, User’s Guide, Rev. 0, 03/2014

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TWR-KV31F120M features

3 TWR-KV31F120M features

• Tower-compatible microcontroller module.

• KV31F512VLL12 MCU (120 MHz, 512 KB Flash, 96 KB RAM, low power, 100 LQFP package).

• General-purpose Tower Plug-in (TWRPI) socket.

• On-board debug circuit: K20DX128VFM5 (OpenSDA) with virtual serial port.

• FXOS8700CQ: 6-Axis Digital Sensor Accelerometer + Magnetometer.

• Four (4) user-controllable LEDs plus RGB LED.

• Four (4) user pushbutton switches for GPIO interrupts.

• One (1) user pushbutton switch for MCU reset.

• Potentiometer.

4 Get to know the TWR-KV31F120M

Figure 2. Front side of TWR-KV31F120M module

TWR-KV31F120M Tower Module, User’s Guide, Rev. 0, 03/2014

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(TWRPI devices not shown)

Reference documents

5 Reference documents

The documents listed below should be referenced for more information on the Kinetis K Series, Tower
System, and MCU modules. These can be found in the documentation section of
www.freescale.com/kinetis.

• TWR-KV31F120M-SCH (schematics)

• KV31P100M120SF7RM (reference manual)

• Tower configuration tool

• Tower mechanical drawing

6 Hardware description

The TWR-KV31F120M is a Tower MCU Module featuring the KV31F512VLL12—a Kinetis V Series
microcontroller in a 100 LQFP package with high speed run mode. It is intended for use in the Freescale
Tower System but can also operate alone. An on-board OpenSDA debug circuit provides a Serial Wire
Debug (SWD) interface and a power supply input through a single micro-USB connector.

The block diagram of the TWR-KV31F120M board is presented in the following figure:

Figure 3. Block Diagram of TWR-KV31F120M

TWR-KV31F120M Tower Module, User’s Guide, Rev. 0, 03/2014

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