NXP Semiconductors A71CLARD-BA Manual de usuario

AN12306

A71CL Quick start guide for A71CLARD-BAI and Kinetis

Rev. 1.0 — 14 December 2018

515910

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Document information

Info

Content

Keywords

Security IC, A71CL, A71CLARD-BAI, FRDM-K64F

Abstract

This document helps getting started with A71CLARD-BAI and the FRDM-

K64F development platforms for K64 MCUs.

NXP Semiconductors

AN12306

A71CL Quick start guide for A71CLARD-BAI and Kinetis

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Contact information

For more information, please visit:

http://www.nxp.com

Revision history

Rev

Date

Description

1.0

20181214

First release

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AN12306

A71CL Quick start guide for A71CLARD-BAI and Kinetis

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Introduction

This document explains how to get started with the A71CLARD-BAI development kit and

the FRDM-K64F development platforms for K64 MCUs. This guide provides an overview

of the hardware used, followed by detailed instructions for setting up the software

development environment. Finally, it describes how to run an MCU example doing crypto

on the secure element using FRDM-K64F acting as the platform host MCU.

A71CL Overview

The A71CL-BAI is a ready-to-use solution, enabling ease-of-use security for IoT device

makers to connect to Baidu Cloud. It is a secure element capable of securely storing and

provisioning credentials and is already pre-provisioned with Baidu credentials. It is based

on A71 secure element hardware which runs an application which manages the

credentials.

The A71CL-BAI solution provides basic security measures protecting the IC against

many physical and logical attacks. It can be integrated with various host platforms and

operating systems to secure a broad range of applications.

System description

The A71CL evaluation setup presented in this document consists of an A71CL security

IC connected to the FRDM-K64F development platform through the A71CLARD-BAI

Arduino compatible kit.

Fig 1. System architecture diagram

This getting-started guide is divided in three parts:

•Hardware overview and setup: It describes the FRDM-K64F development platform

and the A71CL Arduino compatible kit (A71CLARD-BAI) as well as how to mount

them together.

•Software setup: It describes how to configure the development environment and

how to import the required software packages.

•A71CL application examples execution: It describes how to run the A71CL

application examples contained in the A71CL-Baidu Host software package.

aaa-032573

development PC kinetis board

HOST MCU

A71CLARD-ALI

ARDUINO

INTERFACE

BOARD

A71CL-

ALI

USB I

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AN12306

A71CL Quick start guide for A71CLARD-BAI and Kinetis

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Note: From now on, the term ‘Kinetis board’ will be used in this guide to avoid

redundancy and to improve readability. ‘Kinetis board’ refers to the FRDM-K64F.

Hardware overview

This setup uses a Kinetis board as a host MCU while the A71CL security IC acts as the

secure element. The following two boards are needed:

Table 1. Needed Boards

Item

Type / 12NC

Content

Arduino

Development Kit

A71CLARD-BAI

9353 763 89598

(only available

through NXP

sales contact)

Arduino Adapter Board +

MiniPCB containing a A71CL

secure element IC pre-

provisioned for Baidu Cloud:

A7101CLTK2/T0BC27F,

12NC: 9353 725 76118

MCU-Board

FRDM-K64F

9353 262 93598

K64F Freedom MCU-

Development board

4.1 A71CL Arduino compatible development kit (A71CLARD)

The A71CLARD is an Arduino development kit containing two items as well as:

1. An A71CL Mini PCB board

2. An Arduino interface board, allowing the user to connect the A71CL to any host

featuring an Arduino compatible header (e.g., many LPC, Kinetis and i.MX boards in

the industry).

4.1.1 A71 Mini PCB board

The Mini PCB board is a small PCB containing the A71 solution and a set of jumpers for

the I2C host interface selection.

Fig 2 shows an image of the MiniPCB. It features two connectors that can be used

depending on the communication interface employed. The figure shows the jumpers

configuration that enables the use of the A71 I2C interface.

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A71CL Quick start guide for A71CLARD-BAI and Kinetis

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Fig 2. A71 mini PCB

To enable the I2C communication protocol, it is necessary to configure JP5/6 according

to Table 2. JP2 connects the A71 to the on-board 3.3V voltage regulator on the MiniPCB

board. The jumpers JP3 and JP4 enable the I²C SDA/SCL pull-up resistors. JP7 can be

used to connect the A71 reset signal.

Table 2. Default MiniPCB Jumper settings

Jumper

Setting

Usage

JP1

Not set

External VCC connection

JP2

3-4

Connect A71 to 3.3V regulator on MiniPCB

JP3

Set

Connect I²C SDA pull-up resistor

JP4

Set

Connect I²C SCL pull-up resistor

JP5

1-2

Use I²C address 0x92/0x93

2-3 (Default)

Use I²C address 0x90/0x91

JP6

1-2

Activate I²C interface

JP7

Not set (Default)

A71 operates

Set

A71 IC reset

The board schematic and layout are shown in Fig 3 and Fig 4.

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A71CL Quick start guide for A71CLARD-BAI and Kinetis

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Fig 3. A71 Mini PCB board schematic

aaa-032574

VSS

100 nF

GND

GND GND

n.c.

100 nF

GND

IC2

nc/A7101 HVSON8_SOT909-1

VCC VCC

n.c.

nRSTSDA

SCL

IF1

IF02

VSS

100 nF

100 kΩ

GND GND

IC1

A7101 SO8_SOT96-1

VCC VCC

VCC

n.c.

nRSTSDA

SCL

IF1

IF05

IF0

Molex

38-00-1336

IF1

GND

SCL

SDA

VCC +5 V

SCL

Molex

38-00-1334

VCC +5 V

GND

SDA

VSS

100 nF

GND

IC4

JP2

VCC select

VCC

VCC_ext

nc/A7101 WLCSP

VCC VCC

n.c.

nRSTSDA

SCL

IF1

IF0

A1 n.c.

B1 n.c.

C1 n.c.

TP C2

IC3

TDA3663

2 4

VP REG+5 V+3.3 V

10 µF

GND

GNDGND

100 nF

JS5

VCC

JP5

CLK

GND

10 µF

JS2

GND

JP1

VCC ext.

GND

JS6

JP6

nSS

JS4

JP4

JS3

JP3

3.3 kΩ

1.0 kΩ

JS7 JP7

JS1

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A71CL Quick start guide for A71CLARD-BAI and Kinetis

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Fig 4. A71 Mini PCB board silkscreen with default jumper positions marked black

4.1.2 Arduino interface board

The Arduino header board permits the user to interface the A71 Mini PCB with the

Kinetis board. Fig 5 shows the board pinout.

(1) Connection from the perspective of a matching Arduino Shield (top view)

Fig 5. A71 Arduino header

4.2 Freedom development platforms for Kinetis

The section details the Freedom development platforms for Kinetis supported by the

A71CL product support package.

4.2.1 FRDM-K64F

The Kinetis FRDM-K64F [FRDM_K64F] [6] development platform is a simple, yet

sophisticated design, featuring a Kinetis K64 series microcontroller, built on the ARM®

Cortex®-M4 core. The FRDM-K64F can be used to evaluate the K64, K63, and K24

Kinetis K series devices. It features the MK64FN1M0VLL12 MCU, which boasts the

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A71CL Quick start guide for A71CLARD-BAI and Kinetis

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maximum operation frequency of 120 MHz, 1 MB of flash, 256 KB RAM, a full-speed

USB controller, Ethernet controller, secure digital host controller, and analog and digital

peripherals.

The FRDM-K64F hardware is form-factor compatible with the Arduino R3 pin layout,

providing a broad range of expansion board options. The onboard interface includes a

six-axis digital accelerometer & magnetometer, RGB LED, SDHC, add-on Bluetooth

module, add-on RF module, Ethernet and OpenSDAv2, the NXP open-source hardware

embedded serial and debug adapter running an open-source bootloader.

Fig 6. FRDM-K64F Freedom development platform for Kinetis K64, K63 and K24 MCUs

Hardware setup

The hardware setup consists of mounting the different boards together.

First, plug the A71 Mini PCB board to the I2C plug of the Arduino interface board.

Fig 7. A71 Mini PCB board mounting on the I2C adaptor of the Arduino interface board

Second, plug the A71CL into the Kinetis board using the Arduino adaptors. The Arduino

shield board comes with male connectors below and female connectors on top.

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A71CL Quick start guide for A71CLARD-BAI and Kinetis

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Fig 8. A71 Arduino kit mounted on Kinetis FRDM-K64F board

Then, the A71 security IC is connected to the Kinetis board through the Arduino interface

board. See Fig 9.

Fig 9. Arduino interface board connected to the Kinetis board (FRDM-K64F)

As can be observed, there are two USB connectors in the Kinetis boards FRDM-K64F.

See Fig 10. The USB connector highlighted in red corresponds to OpenSDA debug port.

This port will be used by the development PC to flash and debug the A71 examples over

an on-board debugger into the Kinetis MCU as well as to have a serial console. The USB

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A71CL Quick start guide for A71CLARD-BAI and Kinetis

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connector highlighted in yellow is directly connected to the K64F MCU and functionality

depends on the example programmed into the MCU.

Fig 10. Red USB indicates OpenSDA debug port. Yellow USB indicates K64F port

(FRDM-K64F)

Software setup

This section details the required steps to complete the software setup for A71 security IC

and FRDM-K64F Freedom development platforms. The following items are needed:

•MCUxpresso IDE, see section 6.1. Here we use version 10.2.

•Kinetis SDK for MCUxpresso, see section 6.2. Here we use version 2.4.

•Hostlibrary code examples installation and importing, see sections 6.3 and 6.4.

•Serial terminal application, see section 6.5.

•OpenSDA debugger firmware update on Kinetis board, see section 6.6.

6.1 MCUXpresso IDE installation

MCUXpresso IDE is a fully featured software development environment for NXP’s ARM-

based MCUs, and includes all the tools necessary to develop high-quality embedded

software applications in a timely and cost-effective fashion.

MCUXpresso IDE is based on the Eclipse IDE and includes the industry standard ARM

GNU toolchain. It brings developers an easy-to-use and unlimited code size development

environment for NXP MCUs based on Cortex-M cores (LPC, Kinetis and i.MX RT). The

IDE combines the best of the widely popular LPCXpresso and Kinetis Design Studio

IDEs, providing a common platform for all NXP Cortex-M microcontrollers.

MCUXpresso IDE is a free toolchain providing developers with no restrictions on code or

debug sizes. It provides an intuitive and powerful interface with profiling, power

measurement on supported boards, GNU tool integration and library, multicore capable

debugger, trace functionality and more. MCUXpresso IDE debug connections support

Freedom, Tower, EVK, LPCXpresso and custom development boards with industry

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