NXP Semiconductors QN9020 mini DK Bedienungsanleitung

UM10895

QN9020 mini DK user guide

Rev. 4 — 12 November 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.

User manual Rev. 4 — 12 November 2018 2 of 22

Contact information

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: [email protected]

NXP Semiconductors UM10895

QN9020 mini DK user guide

Revision history

Rev Date Description

v.4 20181112 fixed Figure 10.

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

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QN9020 mini DK user guide

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

http://www.nxp.com/products/microcontrollers-and-processors/more-processors/applicati

on-specific-mcus-mpus/bluetooth-low-energy-ble:BLUETOOTH-LOW-ENERGY-BLE

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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QN9020 mini DK user guide

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 Table 1 .

Fig 1. The QN9020 functional diagram

Fig 2. The QN9020 board top view

aaa-018330

GPIO/SENSOR CONNECTOR GPIO/SENSOR CONNECTOR

GPIO/SENSOR CONNECTORBUTTON2

LED1

LED2

BUTTON1

RESET

Virtual UART

POWER

OnBoard

ANTENNA

MATCHING

JLink OB

(ATSAM3U2C)

UART

SWD QN9020

CR2032

USB

PORT

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QN9020 mini DK user guide

Fig 3. The QN9020 board bottom view

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 QN9020 chip

17 QN9020 reset button used for QN9020 hardware reset

18 CR2032 battery holder CR2032 battery holder

19 piezo buzzer buzzer: KLJ-1230

20 jumper used for power cycle ATSAM3U2CA

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QN9020 mini DK user guide

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 Tab l e 2 .

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.

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

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

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QN9020 mini DK user guide

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  resistors

R37, R38 should be soldered; see Figure 6.

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

Fig 6. Connect R37, R38

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In order to use a USB to UART bridge for the QN9020 download, the solder bridge SB3,

SB4 should be shorted; see Figure 7.

2.5 QN9020 device

The QN9020 device is integrated with a BLE radio, controller, protocol stack and profile

software, and a high performance MCU on a single chip; see Figure 8.

Fig 7. Short R35, R36

Fig 8. The QN9020 device

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2.6 GPIO interface

In QN9020 mini development board version V7, the connectors J6, J7, J8 and J9 provide

GPIO connection. The net name is shown in Figure 9.

In QN9020 mini development board version V8, connectors J6 and J7 provide GPIO

connection, as shown in Figure 10.

2.7 QN9020 reset button

The reset button is used to provide hardware reset to the QN9020 device. When

programming the QN9020 using UART interface of SEGGER J-Link OB, the reset button

should be pressed first to ensure that QN9020 is in boot mode. See Figure 11 for the

detailed circuit.

Fig 9. QN9020 version V7 GPIO connections

Fig 10. QN9020 version V8 GPIO connections

aaa-018338

1nRESET

P3.0_ADC- 2

910

P3.1_ADC+P3.2_SPI0-MISO

P3.3_SPI0-MOSIP3.4_SPI0-CLK

P3.5_SPI0-CSP3.6

QN_VCC_3.3 VGND

1P0.0 UART0-TX

P0.1_UART0-CTS 2

910

P0.2 UART0-RTSP0.3

P0.4P0.5

SWDIO/TMSSWCLK/TCK

QN_VCC_3.3 VGND

1P2.0_UART1-RX

P2.1_UART1-TX 2

910

P2.2P2.3_I2C-SDA

P2.4_I2C-SCLP2.5

P2.6_PWMP2.7_PWM

GNDQN_VCC_3.3 V

1P1.0_SPI1-MISO

P1.1_SPI1-MOSI 2

910

P1.2_SPI1-CSP1.3_SPI1-CLK

P1.4P1.5_PWM

P1.6_PWMP1.7_UART0-RX

GNDQN_VCC_3.3 V

Fig 11. QN9020 reset

aaa-018339

SW3

reset button

nRESET

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2.8 LED

The QN9020 board offers two programmable LEDs, which are connected to the QN9020

device GPIO.

LED1 and LED2 are connected to GPIO P0.4 and P0.5 respectively. The connections are

shown in Figure 12. The LEDs are powered-up when the corresponding GPIO outputs

switch to logic LOW level.

2.9 Button

The QN9020 board offers two buttons which are connected to QN9020 device GPIO.

Button 1 and button 2 are connected to GPIO P1.4 and P1.5 respectively. See Figure 13

for detailed circuits.

When using the buttons, the GPIO P1.4 and P1.5 must be configured as inputs. Logic

LOW input is applied to QN9020 when a button is pressed.

Fig 12. LED circuit

aaa-018340

R20

LED1

LED2

D3 R21

470 Ω

QN_VIO

P0.5

P0.4

Fig 13. Button circuit

aaa-018341

R15

P1.4

P1.5

button 1

SW1

R18

100 kΩ

QN_VIO

button 2

SW2

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