NXP Semiconductors Freedom FRDM-KV11Z User Manual

NXP Semiconductors

Document Number:

FRDMKV11ZUG

Application Note

1

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Contents

1. Introduction ........................................................................ 1

Freedom FRDM-KV11Z Development Board
User’s Guide

1. Introduction

The Freedom development board is a set of software
and hardware tools for evaluation and development. It is
ideal for rapid prototyping of microcontroller-based
applications. The Freedom KV11 hardware,
FRDMKV11Z, is a simple, yet sophisticated design
featuring a Kinetis V series microcontroller, built on the
ARM® Cortex®-M0+ core, and a perfect solution for
BLDC and PMSM motor control applications. FRDM­KV11Z can be used to evaluate the KV1x Kinetis V
series devices. It is based on the MKV11Z128VLF7
microcontroller, running up to 75MHz with hardware
square root and divide capability and featuring dual 16­bit analog-to-digital controllers (ADCs) sampling at up
to 1.2 mega samples per second (MS/s) in 12-bit mode,
multiple motor control timers, 128KB of flash and
16KB of RAM memories and CAN interface. It is
supported by a comprehensive enablement suite from
NXP and its third-party resources including reference
designs, software libraries, and motor configuration
tools. The FRDM-KV10Z hardware is form-factor
compatible with the Arduino® R3 pin layout, providing
a broad range of expansion board options. Board
embeds a 6-axis digital sensor, combining
accelerometer and magnetometer, an analog thermistor,
a RGB LED and two user push-buttons. The
FRDMKV11Z platform includes the OpenSDA, the
NXP open-source hardware for embedded serial and
debug adapter, programmed with an open-source
bootloader. This circuit offers several options for serial
communication, flash programming, and run-control

Rev.

2. FRDM-KV11Z Hardware Overview.................................. 2

3. FRDM-KV11Z Hardware Description ............................... 4

3.1. Power supply .......................................................... 4

3.2. Measuring MCU current ......................................... 5

3.3. Debug interface ....................................................... 6

3.4. OpenSDA ................................................................ 6

3.5. Cortex debug connector .......................................... 6

3.6. Virtual mass storage device programming .............. 7

3.7. Virtual serial port .................................................... 9

4. Microcontroller .................................................................. 9

5. Clock source .................................................................... 10

6. Accelerometer and magnetometer .................................... 11

7. Thermistor ........................................................................ 12

8. RGB LED ........................................................................ 13

9. CAN serial interface ........................................................ 14

10. Reset ................................................................................ 14

11. Push button switches ........................................................ 15

12. Input/output connectors .................................................... 16

13. Arduino Compatibility ..................................................... 17

14. References ........................................................................ 17

15. Revision history ............................................................... 18

5/2019

© 2016 NXP B.V.

PRELIMINARY

FRDM-KV11Z Hardware Overview

debugging. OpenSDA software is from P&E Micro debug interface firmware for rapid prototyping and
product development.

2. FRDM-KV11Z Hardware Overview

The features of the FRDM-KV11Z hardware are as follows:

• MKV11Z128VLF7P MCU (75 MHz with hardware square root and divide, 128 KB flash and 16

KB RAM memory, dual 16-bit ADCs and motor control timers, CAN, 48 LQFP package).

• Triple role USB interface with micro-B USB connector

• RGB LED

• FXOS8700CQ – Accelerometer and magnetometer

• Two user push buttons

• Flexible power supply option – OpenSDA USB, and Arduino header and 5 V power input

• Easy access to MCU I/Os through Arduino R3-compatible and proprietary headers

• Programmable OpenSDAv2.1 debug circuit programmed with the CMSIS-DAP Interface

application that provides:

o Mass storage device (MSD) flash programming, over a driver free USB connection.
o P&E Micro debug interface providing run-control debugging for ARM® IDE toolchains.
o Virtual serial port interface.

Figure 1 shows the block diagram of the FRDM-KV11Z design:

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FRDM-KV11Z Evaluation Board Users Guide

FRDM-KV11Z Hardware Overview

Figure 1. FRDM-KV11Z block diagram

The primary components and their placement on the hardware assembly are explained in the below
figure:

FRDM-KV11Z Evaluation Board Users Guide

NXP Semiconductors 3

FRDM-KV11Z Hardware Description

Figure 2. FRDM-KV11 callout

3. FRDM-KV11Z Hardware Description

Power supply

There are multiple power supply options on the FRDM-KV11Z. It can be powered from either of the
USB connectors, the VIN pin on the J3 header, the DC Jack (not populated), or an off-board 1.71 V–3.6
V supply from the 3.3 V pin on the J14 header. The USB OpenSDA and the DC jack are regulated
onboard using a 3.3 V DC-to-DC linear regulator to produce the main power supply. The voltage of the
J14 and J3 header inputs are not regulated and will provide direct power-supply to the KV11Z
microcontroller.

When attached to either the FRDM-MC-LVBLDC or the FRDM-MC-LVPMSM 3.3 V voltage is
supplied from the motor control power board through the J3 header. The table below provides the
operational details and requirements for the power supplies.

FRDM-KV11Z Evaluation Board Users Guide

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FRDM-KV11Z Hardware Description

Power Supply sources

Supply source Valid range OpenSDA operational Regulated onboard

OpenSDA USB 5V Yes Yes

VIN pin (J3 Header)

1.71 – 3.6 V Yes No

3.3V Header(J14) 1.71 – 3.6 V No No

DC- Jack (not populated) J15 5-9 V Yes Yes

Figure 3. Power supply Regulation

Measuring MCU current

Cut trace jumper J14 is provided to isolate the power supplied to the KV11 MCU. To measure the
current consumed by the MCU you can cut the trace on J14 and place a milliamp measuring DMM
across the J14 header pins. Alternatively, you can populate the 10 Ohm R126 and place a voltage
measuring DMM across the J14 header pins. The current will be = to the V/R126 value.

FRDM-KV11Z Evaluation Board Users Guide

NXP Semiconductors 5

FRDM-KV11Z Hardware Description

Figure 4. OpenSDA and Power Switch

Debug interface

There are two debug interface options provided: the on-board OpenSDA circuit and an external ARM
Cortex JTAG connector. The ARM Cortex SWD connector (J19) is a standard 2x10-pin connector that
provides an external debugger cable access to the SWD interface of the KV311Z128VLH7P.
Alternatively, the on-board OpenSDA debug interface can be used to access the debug interface of the
KV311Z128VLH7P.

OpenSDA

An on-board K20DX128VFM5- based OpenSDA circuit provides a SWD debug interface to the
KV311Z128VLH7P. A standard USB-A male to micro-B male cable (provided) can be used for
debugging via the USB connector (CN1).

The OpenSDA interface also provides a USB to serial bridge. Drivers for the OpenSDA interface are
provided in the IDE you use. Updated Windows drivers and more utilities can be found online at

http://www.pemicro.com/opensda.

Cortex debug connector

The Cortex Debug connector is a 20-pin (0.05") connector providing access to the SWD signals
available on the KV11 device. If the OpenSDA is powered and J13 is used cutting the trace on J11

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FRDM-KV11Z Evaluation Board Users Guide