NXP Semiconductors QN9020 User Manual

UM10895

QN9020 mini DK User Guide

Rev. 3 — 18 April 2018 User manual

Document information

Info Content Keywords mini DK, J-Link OB, UART, SWD, GPIO, LED, button, power supply,

buzzer

Abstract

This user manual describes the features of the QN9020_MINIDK_Vx

board.

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Revision history

Rev

Date

Description

v.3

20180417

Updated Section 2.5, “QN9020 device”.

v.2

20160524

second release. Modifications:

• Section 1.2 “Additional resource” updated.

• Figure 5 updated.

• Section 2.6 “GPIO interface” updated.

• Section 3.1 “Schematics for QN9020 mini DK board” updated.

v.1

20150601

initial release

Contact information

For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com

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1.

Introduction

This user manual describes the hardware details of the QN9020 mini Development Kit (DK).

1.1 Kit contents

The QN9020 mini development kit includes the following:

• QN9020 mini development board

• QN9020 USB dongle

• USB cable

1.2 Additional resource

For additional resources, visit https://www.nxp.com/products/wireless-

connectivity/bluetooth-low-energy-ble/ultra-low-power-bluetooth-le-system-on-chip-

solution:QN902X.

2.

Hardware description

The QN9020 mini development board provides easy access to peripherals such as buttons, piezo buzzer and LED. The board also provides useful interfaces such as a USB port for UART communication and J-Link debug, and a GPIO/optional sensor board connector.

A USB dongle is a Bluetooth device powered by the QN9020. It acts as a master when communicating with the QN9020.

2.1 Hardware overview

The hardware blocks in the QN9020 mini DK, and the functional relationship of each main component, are shown in Figure 1.

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The component layout on both the sides of the board is shown in Figure 2 and Figure 3. The detailed information of each component is listed in Ta ble 1.

Fig 2. The QN9020 board top view

GPIO/SENSOR CONNECTOR

OnBoard

ANTENNA

GPIO/SENSOR CONNECTOR

RESET

Virtual UART

UART

USB JLink OB

PORT (ATSAM3U2C)

SWD

QN9020

RF

MATCHING

LED1

POWER

LED2

CR2032

BUTTON1

BUTTON2

aaa-018330

Fig 1. The QN9020 functional diagram

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Table 1. QN9020 board components list

Number

Name

Description

1 J-Link OB ATSAM3U2C; used to offer SWD and UART

interfaces for QN9020 debug and communication 2 connector optional; used for connecting sensor board 3 debug port debug port for ATSAM3U2CA 4 mini USB port power and communication port 5 power source select jumper used for power source selection; see Section 2.3 6 current measurement jumper used to measure the QN9020 device power

consumption 7 LDO (TPS73630) 5 V to 3 V regulator 8 button1 used as input; see Section 2.9 9 button2 used as input; see Section 2.9 10 LED2 used as output; see Section 2.8 11 QN9020 GPIO port used for interface extension 12 LED1 used as output; see Section 2.8 13 SWD resistors zero ohm resistors; shorted for QN9020 device

debug

14

UART interface

used as communication port for QN9020 device

15

PCB antenna

onboard Bluetooth antenna

16

QN9020 chip

17

QN9020 reset button

used for QN9020 hardware reset

18

CR2032 battery holder

19

piezo buzzer

buzzer: KLJ-1230

20

jumper

used for power cycle ATSAM3U2CA

Fig 3. The QN9020 board bottom view

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2.2 Default jumper settings on mini DK board

The jumpers on QN9020 mini DK are factory set to power the board over the USB. The factory-set jumper and switch settings are shown in Ta ble 2.

Table 2. QN9020 mini DK board components list

Jumper Pins to be shorted using

jumpers

Function

J11

2 and 3

USB powered

J12 1 and 2 VCC_QN9020 3.3 V

J13

1 and 2

VCC_MB 3.3 V

2.3 Power supply

The QN9020 board has two power supply modes:

1.

Bus-power mode: The board can be powered using the USB cable. The onboard LDO is used to regulate output voltage to 3 V and supplies power to all parts on the board.

2.

Battery-power mode: The CR2032 supplies power to QN9020 and optional sensor connector when it is in battery-power mode. The J-Link OB still uses the LDO as power supply via USB cable. When using USB interface as a power supply, connect the jumper J11 pin 2 and pin 3; see Figure 4.

When using a CR2032 coin cell as a power supply, connect the jumper J11 pin 1 and pin 2; see Figure 5.

Fig 4. Connecting jumper J11 pin 2 and pin 3 to select USB as power supply

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2.4 SEGGER J-Link OB part

The SEGGER J-Link OB offers the SWD and UART interface. Users can download or update firmware into a QN9020 device by using the UART or SWD interface. Furthermore, it is convenient to debug the program for a QN9020 device using SWD interface.

To program or debug the QN9020 device using the SEGGER J-Link OB, the 0 Ω resistors R37, R38 should be soldered; see Figure 6.

Fig 6. Connect R37, R38

Fig 5. Connecting jumper J11 Pin1 and Pin 2 to select CR2032 coin cell as power supply

NXP Semiconductors QN9020 User Manual

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