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PRELIMINARY

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. FRDM-

KV11Z 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 16-

bit 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

NXP Semiconductors

Document Number:

FRDMKV11ZUG

Application Note

Rev.

5/2019

Contents

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

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

Summary of content (20 pages)

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NXP Semiconductors Application Note Document Number: FRDMKV11ZUG Rev. 1, 5/2019 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.
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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).
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FRDM-KV11Z Hardware Overview Figure 1.
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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.
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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.
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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.
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FRDM-KV11Z Hardware Description header will insure signal integrity. The pinout and KV11 pin connections to the debug connector (J13) are shown figure below. The signal RST_TGTMCU_B is tied to the KV11 RESET_b pin. Figure 5. Cortex debug connector Virtual mass storage device programming A mass storage device is enumerated in a Windows base machine when you attach the FRDM-KV11 with a USB cable to the Windows computer USB connector. Figure 6.
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FRDM-KV11Z Hardware Description Figure 7. PEMICRO.COM OpenSDA report Re-progamming the OpenSDA firmware With header J10 jumper placed between 1-2 (default), if you hold SW1 down while plugging in the USB cable to the FRDM-KV11Z board the Bootloader Mass storage drive is enumerated. Figure 8. Bootloader MSD Copy a new compatible OpenSDA firmware driver available from Segger at https://www.segger.com/. The version compatible with this board is “JLink_OpenSDA_V2_1.
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Microcontroller Virtual serial port A serial port connection is available between the OpenSDA MCU and pins PTB16/UART0_RX and PTB17/UART0_TX. A voltage level translator is on-board to ensure signal integrity in case the KV11 MCU and the OpenSDA MCU are at different voltage levels. To determine which COM port number Figure 9. Determining COM number in Windows Device Manager Open the Device Manager by right-mouse clicking on Computer and select Manage.
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Clock source Memories System Peripherals Clocks Security and integrity modules Analog Modules Timers Communication interfaces • • • • • • • • • • • • • • • • • • • • • • 128 KB flash memory (KMS indicated by P suffix uses top 8 KB of flash). 16 KB SRAM embedded memory. Flexible low-power modes, multiple wake-up sources. 4-channel DMA controller. Independent external and software watchdog monitor.
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Accelerometer and magnetometer Figure 10. FRDM-KV11Z MCU clock source To generate the max system frequency of the MCU, initialize the external clock source the OSC module, divide the input clock for the FLL in the MCG module and then multiply the FLL clock up to the 75 MHz clock frequency. All of these settings and configurations can be managed with the MCUXpresso Clocks tool available on http://www.nxp.com/mcuxpresso. 6.
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Thermistor Figure 11. Accelerometer and magnetometer schematic 7. Thermistor There is a thermistor circuit on the FRDM board. There is a thermistor RT1 provided on the board that can be used as single-ended or differential analog inputs to the KV10Z MCU. In addition to the thermistor, there is a resistor between the thermistor and 3.3 V system power supply and another resistor between the thermistor and ground. The thermistor is a 10 K ohm part, but the associated divider chain uses different resistors.
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RGB LED Figure 12. Thermistor circuit 8. RGB LED RGB LED is connector through GPIO and signal connections are show in the following table. RBG LED RED GREEN BLUE LED Signal Connections KV11Z Connection PTD6 PTE29 PTE25 Figure 13.
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Reset 9. CAN serial interface The CAN interface signals are PTE24/CAN0_TX and PTE25/CAN0_RX. They are connected to an onboard transceiver for buffering on to header J9(not populated). Figure 14. CAN interface circuit 10. Reset The RESET signal is low active on all Kinetis MCUs. The KV11Z Reset signal is connected to the debug K20 MCU and a button SW1. If the J10 jumper is between 1-2 the KV11 Reset is driven by the output of the level translator.
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Push button switches Figure 15. Reset Circuit 11. Push button switches Two general purpose push buttons, SW2 and SW3, are available on the FRDM-KV11Z board. SW2 is connected to PTA4/NMI and SW3 is connected to PTB0. SW2 is connected by default to the NMI – Non-Maskable-Interrupt input. Care should be taken to select the function of the MCU input. If left at default the MCU will hold in the NMI interrupt function if the NMI input is low or logic 0.
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Input/output connectors Figure 16. Switch interrupt circuit 12. Input/output connectors The MKV11Z128VLF7 microcontroller is packaged in a 48-pin LQFP. Some pins are utilized in onboard circuitry, but some are directly connected to one of the four I/O headers. The pins on the KV11Z microcontroller are named for their general purpose input/output port pin function. For example, the first pin on Port A is referred as PTA1.
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References Figure 17. FRDM-KV11Z I/O header Pin-outs 13. Arduino Compatibility The I/O headers on the FRDM-KV11Z board are arranged to enable compatibility with peripheral boards (known as shields) that connect to Arduino and Arduino-compatible microcontroller boards. The outer rows of pins (even numbered pins) on the headers, share the same mechanical spacing and placement with the I/O headers on the Arduino Revision 3 (R3) standard. 14. References The following references are available on www.nxp.
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Revision history • • • • • • • • • • FRDMKV11ZQSG, FRDM-KV11Z Quick Start Guide FRDM-KV11Z Pinouts FRDM-KV11Z Schematic FRDM-KV11Z Design Package KV11P64M75RM KV11Z Sub family Reference Manual KV11P64M75- Kinetis C Series KV10 and KV11, 128/64 KB Flash Data Sheet MCUXpresso Software Development Kit – MCUXpresso IDE MCUXpresso Clocks Tool MCUXpresso Pins Tool 15.
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How to Reach Us: Home Page: nxp.com Web Support: nxp.com/support . Information in this document is provided solely to enable system and software implementers to use NXP products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits based on the information in this document. NXP reserves the right to make changes without further notice to any products herein.