Freescale Semiconductor TWR-K21F120M Manual de usuario

TWR-K21F120M

Quick Start Guide

Low-Power 32-bit ARM

Cortex

-M4

Core-Based MCUs with Floating Point Unit,

USB Connectivity and Enhanced Security

Tower System

Development Board

Platform

2 3

freescale.comQuick Start Guide

TWR-K21F120M Freescale Tower System

Development Board Platform

The TWR-K21F120M board is designed to work either in standalone

mode or as part of the Freescale Tower System, a modular development

board platform that enables rapid prototyping and tool re-use through

reconfigurable hardware. Begin constructing your Tower System evaluation

board platform today by visiting freescale.com/Tower for additional Tower

System boards and compatible peripherals.

Get to Know the TWR-K21F120M Board

Power/OSJTAG

Micro-USB

Regulator

Option

Selector

RESET

K21 USB

Micro OTG

Tamper Pins USB Option Selector

SW2

SW3

Accelerometer

LEDs

Potentiometer

General-

Purpose

TWRPI Plug-In

JM60 Bootloader Selection

JM60 BDMVBAT Options

K21 Cortex Debug

Figure 1: Front side of TWR-K21F120M

Battery

Receptacle

SD Card

Receptacle

4 5

Download Software

and Tools

Download installation

software and documentation

under “Jump Start

Your Design” at

freescale.com/TWR-K21F120M.

freescale.comQuick Start Guide

Step-by-Step

Installation Instructions

TWR-K21F120M

Features

• MK21FN1M0VMC12 MCU (120 MHz,

1 MB flash, 128 KB RAM, FPU, USB

OTG, tamper detection,

encryption, low power, 121 MBGA)

• Dual-role USB interface with Micro-AB

USB connector

• Onboard open source JTAG (OSJTAG)

circuit with virtual serial port

• General-purpose Tower plug-in (TWRPI)

socket

• Three-axis accelerometer (MMA8451Q)

• Four user-controlled status LEDs

• Pushbuttons for GPIO interrupts and

MCU reset

• Potentiometer, SD card socket and coin

cell battery holder

• Independent, battery-operated power

supply for real-time clock and tamper

detection modules

In this Quick Start Guide, you will learn

how to set up the TWR-K21F120M board

and run the included demonstration

software. For more detailed information,

review the user manual at freescale.com/

TWR-K21F120M.

2Install the

Software and Tools

Install the P&E Micro Kinetis Tower toolkit.

The toolkit includes the OSJTAG and USB

to serial drivers.

3Configure the

Hardware

Install the included battery into the battery

receptacle to power the RTC. Then

use the provided USB cable to connect

the PC to the Power/OSJTAG USB

Micro-B connector (J2). Allow the PC to

automatically configure the USB drivers

if needed.

4Tilt the

Board

Tilt the board side to side to see the LEDs

on D5, D6, D8 and D9 light up as it is

tilted. While the board is held flat, press

SW2 and SW3 to toggle LEDs D5 and D9,

respectively.

5Download the Freescale

CodeWarrior IDE and

MQX™RTOS

Download the Freescale CodeWarrior IDE

and MQX RTOS by clicking the relevant

links at freescale.com/CodeWarrior and

freescale.com/MQX.

6 7

freescale.comQuick Start Guide

TWR-K21F120M Jumper Options

The following is a list of all jumper options on the TWR-K21F120M. The default installed

jumper settings are indicated in the shaded boxes.

Jumper Option Setting Description

JTAG Board

Power

Selection

Connect OSJTAG 5 V output (P5V_TRG_USB) to JTAG port

(supports powering board from JTAG pod supporting 5 V supply

output)

OFF Disconnect OSJTAG 5 V output (P5V_TRG_USB) from JTAG port

J7 VBAT Power

Source

1-2 Connect VBAT to onboard 3.3 V or 1.8 V supply

2-3 Connect VBAT to the higher voltage between MCU supply (MCU_

PWR) or coin cell supply (VBATD)

J8 MCU Power

Connection

1-2 Connect onboard 3.3 V or 1.8 V supply (V_BRD) to MCU VDD

2-3 Connect K21 USB regulator output to MCU VDD

OSJTAG

Bootloader

Selection

ON OSJTAG bootloader mode (OSJTAG firmware reprogramming)

OFF Debugger mode

J10

General-

Purpose

TWRPI

V_BRD

Power Enable

ON Connect onboard 1.8 V or 3.3 V supply (V_BRD) to

TWRPI 3 V power (GPT_VBRD)

OFF Disconnect from-board 1.8 V or 3.3 V supply (V_BRD) to

TWRPI 3 V power (GPT_VBRD)

J11 VREG IN

Selector

1-2 OSJTAG 5 V output (P5V_TRG_USB)

connected to onboard regulator input (VREG_IN)

5-6 VBUS signal on micro-USB connector J19 connects to

K21_VREGIN to allow standalone USB operation

6-8 VBUS signal from Tower elevator connector connects to

K21_VREGIN to allow USB operation with complete Tower System

J12 Potentiometer

Connection

ON Connect potentiometer to ADC0_SE12

OFF Disconnect potentiometer from ADC0_SE12

J13

GPIO

RESET_OUT_B

connection

1-2 Connect PTA14 to RESET_OUT_B signal

2-3 Connect PTA17 to RESET_OUT_B signal

OFF Leave RESET_OUT_B signal disconnected

Jumper Option Setting Description

J15 LED

Connections

1-2 Connect PTD4 to green LED (D5)

3-4 Connect PTD5 to yellow LED (D6)

5-6 Connect PTD6 to red LED (D8)

7-8 Connect PTD7 to blue LED (D9)

OFF Disconnect PTD[4:7] from associated LED

J16 SDHC Card

OFF 10K pulldown resistor is disconnected from CD/DATA3 line

ON 10K pulldown resistor is connected to CD/DATA3 line to allow card

detection

J17

V_BRD Power

Source

(Board Power

Selector)

1-2 Connect K21 USB regulator output (VOUT_3V3) to

onboard supply (V_BRD)

3-5 Connect 3.3 V onboard regulator output (P3V3) to

onboard supply (V_BRD)

5-7 Connect 1.8 V onboard regulator output (P1V8) to

onboard supply (V_BRD)

J18

Accelerometer

IRQ

Connection

1-2 Connect PTB0 to INT1 pin of accelerometer

3-4 Connect PTB1to INT2 pin of accelerometer

OFF Disconnect PTB0 and/or PTB1 from INT1 and/or INT2 of

accelerometer

J21 USB ID

Connection

ON Connect PTD7 to USB ID pin

OFF Disconnect PTD7 from USB ID pin

J22 USB Power

Enable

ON Connect PTC9 to USB power enable on power switch MIC2026

OFF Disconnect PTC9 from USB power enable on power switch

MIC2026

J23 USB Over-

Current Flag

ON Connect PTC8 to overcurrent flag on power switch MIC2026

OFF Disconnect PTC8 from overcurrent flag on power switch MIC2026

J24 USB

Connection

1-2 USB micro J19

2-3 USB mini J14 on TWR-SER

JP1 Tamper

Connections 2-3 JP1-1 through JP1-6 are connected to the MCU Tamper pins

TAMPER0 through TAMPER5, respectively

For more information, visit freescale.com/Tower

Join the online Tower community at towergeeks.org

Freescale, the Freescale logo, CodeWarrior 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. ARM and Cortex are registered

trademarks of ARM Limited (or its subsidiaries) in the EU and/or elsewhere.

Doc Number: TWRK21F120MQSG REV 3 Agile Number: 926-27946 Rev D

Visit freescale.com/TWR-K21F120M,

freescale.com/K20 or freescale.com/Kinetis

for more information on the TWR-K21F board.

Support

Visit freescale.com/support for a list of phone

numbers within your region.

Warranty

Visit freescale.com/warranty for complete

warranty information.

Get Started

Download installation software and documentation under

“Jump Start Your Design” at freescale.com/TWR-K21F120M.

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