NXP Semiconductors QN908 series User manual

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DK User Guide
Rev. <MM.mm> — 27 April 2016 DK User Guide
Document information
Info Content
Keywords QN908x DK, User Guide
Abstract This document is an introduction of QN908x DK V1.2 board

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DK User Guide
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Contact information
For more information, please visit: http://www.nxp.com
Revision history
Rev Date Description
0.1 20160818 Initial release
0.2 20160908 Update Figures, schematics and PCB layout according to QN908x DK board V1.0, add
QN9080 QFN Module board information.
0.3 20161110 Update pictures, schematics according to QN908x DK board V1.1, add current test using
DC Power Analyzer. Add notes about using battery as power supply for QN9080 module.
0.4 20170117 Update pictures, schematics according to QN908x DK board V1.2, and change the jumper
default settings.

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1. Introduction
QN908x DK board is designed for QN908x HVQFN and WLCSP package IC evaluation
and development. It is very convenient to evaluate QN908x’s functions and performance.
There are also some useful peripherals, like GPIOs, PMod and Arduino interface. J-Link
and J-Trace functions are all supported for debugging QN908x. ISP download function is
also supported and very easy to use.
1.1 Purpose
This document introduces all functions of QN908x DK V1.2 board,and descripts all parts
on QN908x DK V1.2 board in details.
1.2 Kit contents
The QN9080 DK includes the following:
•QN9080DK board
•QN9080 USB dongle
•USB cable

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2. Hardware description
The QN9080 DK 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 CMSIS-DAP debug, and standard Arduino & Pmod
connector.
A USB dongle is a Bluetooth device powered by the QN9080. It acts as a master/slave
when
communicating with the QN9080 devices..
2.1 Hardware overview
QN908x DK V1.2 board is shown in Figure 1. The detailed information is listed in Table 1.
Figure 1 Board overview
Table 1 QN908x DK V1.2 board’s mar information list.
Number Name Description
1 QN908x USB port
QN908x USB Port, it provides power supply to the
whole board and USB signal path to QN908x
Module
2 LPC4322 USB port
LPC4322 USB Port, it provides power supply to the
whole board and the USB signal path is connected
to LPC4322
3 LPC4322 LPC4322 works as JTAG/SWD Link bridge
4 QN908x Module QN908x Module board has two types of board
according to QN908x chip package: HVQFN and

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WLCSP
5 Jumper JP1
Jumper to select JTAG/SWD Link bridge target,
Open: On board target (Default)
Short: Off board target
6 Jumper JP5
Jumper to set LPC4322 DFU mode,
Short: DFU mode enable
Open: Normal mode (Default)
7 Jumper JP7
QN908x Module power supply voltage select
Jumper:
1-2: 1.8V Power supply
2-3: 3.0V Power supply
8 Jumper JP8
Jumper to select QN908x ISP UART path mode,
Short: UART path enable (Default)
Open: UART path disable
9 Jumper JP11
Jumper to select QN908x external I2C path mode,
Short: I2C path enable (Default)
Open: I2C path disable
10 Header J5 and J7 QN908x GPIO for test and compatible to Arduino
board interface
11 Header J4 and J6 QN908x GPIO for test and compatible to Arduino
board interface
12 Jumper JP12,
JP13, JP14 Jumper to select Power Consumption Test
13 Header J8 PMod interface connector, compatible to PMod
14 J-Link Connector Used to offer JTAG/SWD interfaces for off-board
target
15 Jumper JP2 Jumper to select QN908x Power supply source,
on-board power or EXT power
16 Button3 SW3 Button3 used to reset QN908x chip
17 Button1 SW1 Button1 is a function button defined by user
18 Button2 SW2 Button2 is a function button defined by user
19 Jumper JP15 Jumper used to enable QN908x chip mode function
20 GND Pin GND pin used as test ground pin
21 Jumper JP16 Jumper used to cut off USB leakage, when DK
board powered by battery

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2.2 Default jumper settings on DK board
s shown in Figure 2, power, JTAG/SWD, UART and I2C enable jumpers are connected
in default. Table 2 and Table 3 show jumper’s function and how to connect.
Figure 2 Board jumper default settings
Table 2 QN9080A MINIDK board’s default jumper settings
Jumper Jumpers Setting Function
JP2 Pin 1,2 shorted QN908x on-board power
JP7
Pin 1,2 shorted QN908x’s power(1.8V)
Pin 2,3 shorted QN908x’s power(3V)
JP8 Pin 1,2 open UART path disable
JP11 Pin 1, 2 open I2C path disable
JP16 Pin 1,2 shorted When DK board powered by
battery, leave it open
2.3 J-Link OB debugger
The J-Link MCUXpresso OB provides both SWD/JTAG and UART interface. Users can
download or update firmware into a QN908x device by using the UART or JTAG/SWD
interface. There is the J-Link connector for programming and debugging off-board target,
shown in Figure 3.

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Figure 3 J-Lin connector
2.4 QN9080 Module
QN908x IC integrates a BLE radio, controller, protocol stack and profile software on a
single chip, which can provide a flexible and easy way to use BLE SoC solution. It also
includes a high performance MCU (32-bit ARM Cortex-M4F), on-chip memory, and
peripherals for users to develop a truly single chip wireless MCU solution.
Shown in Figure 4.
Figure 4 QN9080 Module Board
QN908x Module has MIFA antenna on front of board. So it can work without external
antenna. There is a RF connector that is with switch on RF front-end. You can easily do
RF test by connecting a RF cable to the RF connector.
2.5 GPIO and Arduino interface
On QN908x DK board, the connectors J4, J5, J6 and J7 provide all GPIO connection
output. And it is also compatible to Arduino board interface. The interface schematic is
shown in Figure 5.

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Figure 5 QN908x DK board GPIO and Arduino interface
2.6 QN908x reset button
The reset button is used to provide hardware reset to the QN908x device. Shown in
Figure 6.
Figure 6 Reset button
2.7 ISP mode jumper
“JP15” is the ISP mode jumper which is used to set QN908x ISP mode. When the jumper
is shorted, the chip mode “PB02” pin is connected to GND and this function is enabled.
When the jumper is open, the ISP mode function is disabled. Shown in Figure 7.
Figure 7 Chip mode jumper
2.8 JTAG interface

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The board provides a SWD/JTAG interface for the usage of external debugger. Shown in
Figure 8.
Figure 8 JTAG interface
2.9 Buttons
As shown in Figure 9 for detailed circuits, the DK board offers three buttons. When using
the buttons “SW1” and “SW2”, the GPIO must be configured as inputs. Logic LOW input
is applied to GPIO when a button is pressed.
Figure 9 Buttons
The button “SW3” is used to reset QN908x chip. Press down the button, QN908x will be
reset.
2.10 LED
The board offers a three colors RGB LED. The connections are shown in Figure 10. The
LED will light up when the corresponding GPIO outputs switch to logic High level. The
control pins of GPIO are QN_PA13, QN_PA25 and QN_PA31. The GPIO QN_PA13 can
work at PWM out mode. So that the brightness of LED can change with PWM pulse
width.

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Figure 10 LED

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3. DK Board Application Function
3.1 J-Link OB Interface
QN908x DK V1.2 board offers JTAG/SWD interface either to on-board QN908x or off-
board target. It also provides USB to UART interface for QN908x.
3.1.1 J-Link to on-board QN908x
When programing or debugging the QN908x device using the SEGGER J-Link OB, JP1
and JP2 should be configured as shown in Table 3.
Table 3 ISP mode jumper setting
JP1 Open, J-Link target is on-board QN9080
JP2 Short Pin1,2, QN908x power enable.
When downloading firmware into QN908x with ISP mode, you should enable UART path
and set Chip mode pin to ground. The jumper set shown in Table 4.
Table 4 ISP mode jumper setting
JP8 Short, UART path enable
JP15 Short, ISP mode enable
There is ISP download operation flow, shown in Figure 11.
Figure 11 ISP download operation flow
After ISP download operation, move the jumper cap on JP15 away and leave JP15 open.
Then the QN908x chip can go into normal mode normally.
3.1.2 J-Link to off-board target
When using QN908x DK board to program or debug off-board target by JTAG/SWD
interface, JP1 and JP2 should be configured as shown in Table 5.
Table 5 ISP mode jumper setting
JP1 Short, J-Link target is off-board target
JP2 Short pin 2,3, 3V power disable on JTAG/SWD connector
3.2 Current Consumption Test
QN908x DK board has two ways to measure QN908x chip current consumption. One
UART
Enable
Short ISP
Jumper
ISP
Loading
Press QN90 x
RST Button

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way is that the current can be measured by on board precise resistor used for I-to-V
conversion. The small voltage signal amplified by operation amplifier and given to ADC.
Then it can be calculated by LPC4322 and shown in MCUXpresso IDE. Another way is
that the current is measured by external Ammeter through Jumper JP14.
3.2.1 Current Test using LPC4322
The QN908x DK board has an on-board current measurement circuit consisting of a
MAX9634T (U18) current monitor chip and a 12-bit ADC (ADC122S021, U19) with a 12-
bit sample at 50k to 200ksps. The on-board MAX9634T current monitor measures the
voltage across the QN908x VCC V-sense resistors; either 8.24Ωor 4.12 Ωif JP13 is
installed. The MAX9634 multiplies the sense voltage by 25 times to provide a voltage
range suitable for the ADC to measure.
A 2-input analog mux is used to choose which channel to be measured, the QN9080 or
the devices from expansion board on the DK extension connectors. The current
measurement circuit is controlled by the Link2 processor and is not user programmable.
Power measurement utilities with this feature are available only after MCUXpresso IDE
installation.
Due to input offset voltage variations in the MAX9634, the current measurement circuit is
not recommended for measuring current below 150uA.
The QN908x current can be measured by the voltage across a sense resistor in series
with the supply. The voltage across a series 4.12Ωresistor with the target QN908x VCC
can be manually measured at JP12 on the PCB. Use Ohm’s law to calculate the current
(QN908x current = measured voltage / 4.12Ω). As an example, if the measured voltage is
10mV, then 10e-3 / 4.12Ω= 2.44mA. Note that the current consumed by the MAX9634
used in the on-board current measurement will be included in the voltage measured
across this resistor. The detailed schematic shown in Figure 12.
Figure 12 Current Test Using LPC Processor
When doing current test using Link2 processor, the Jumper JP12、JP13 and JP14 will
be set like shown in Table 6 .
Table 6 Current Test Jumpers Setting
JP12 Open, when used for Link2 processor current test
JP13 Open, when used for Link2 processor current test

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JP14 Short, when no digital ammeter series in
3.2.1 Current Test using digital ammeter
When doing current test using external digital ammeter, the Jumper JP12、JP13 and
JP14 will be set like shown in Table 7. A jumper cap is used to short the pins. The
schematic shown in Figure 13.
Figure 13 Current Test Using Ammeter
When doing current test using ammeter, the Jumper JP12、JP13 and JP14 will be set
like shown in Table 7.
Table 7 Current Test Jumpers Setting
JP12 Short, when used for Ammeter current test
JP13 Short, when used for Ammeter current test
JP14 Need an ammeter series in
3.2.2 Current Test using DC Power Analyzer
When measuring current using DC Power Analyzer, there are two ways to do this: One
way is using the DC Power Analyzer as an ammeter which share the same settings as
ammeter test. The other way is using the DC Power Analyzer as the power supply to
DUT.
In this case, the QN9080 Module is power by DC Power Analyzer. The QN_VCC power
pin is on Jumper JP14, where a triangle symbol indicates the pin. Also, there is a GND
pin nearby Jumper JP2, which can be used as power ground.

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Figure 14 QN_VCC Power pin
3.3 RF Connective Test with CBT
QN908x Module RF signal can be tested by on-trace RF connector. This RF connector
manufacturer is Murata. When performing the RF test with CBT instruments system,
there may need an expansion board to match signal voltage level from UART to RS232
interface. The RS232 expansion board can get power supply from QN908x DK Board
through connectors. The connection of two boards shown in Figure 15.
Figure 15 RF CBT test with Expansion Board
Before RF test, you should download “Controller Mode” software to QN908x Module or
make the QN908x enter the DTM mode. Then Connect an RF cable from QN908x

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Module to CBT and set the CBT RS232 Baud Rate@115200 bps. After that, you can
start your RF test.

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4. QN9080 USB Dongle
4.1 Dongle Hardware
USB Dongle works together with QTool and behaves as a master or slave when talking
to QN9080 DK or other devices. Just as illustrated in diagram below, USB Dongle
receives commands from QTool via virtual COM port, by which QN908x would be
initialized as a Master or Slave device. All tests can be performed by QTool after
initialization.
4.2 Dongle Connection
QN908x USB dongle is a USB interfaced device with a QN9080 packed in. With driver
and SDK installed in computer (refer to QN9080 quick start guide), user can use QTool in
SDK to control the QN9080 in dongle to work as a central device. The K board with
USB power supply from computer works as a peripheral device. The connection of the
dongle is illustrated as blow figure. For QTool usage, please refer to QTool User Manual
4.3 Dongle Authentication
HVIN: QN9080 BLE Dongle:
FCC ID: 2AIHS9080DG
5. Appendix
5.1 Schematics
5.1.1 QN908x DK main board
QN908x DK V1.22 board schematic have five parts: Power, LPC processor, QN908x-
BLE, QN908x-Function and Arduino Interface.
018-170145

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Figure 16 Power schematic for QN908x DK board

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Figure 17 LPC processor schematic for QN908x DK board
Figure 18 QN908x-BLE schematic for QN908x DK board

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Figure 19 QN908x-Function schematic for QN908x DK board
Figure 20 Arduino Interface schematic for QN908x DK board

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5.1.2 QN9080 module board
Figure 21 QN9080 QFN Module board
5.2 PCB layout
5.2.1 QN908x DK main board
Figure 22 Top Etch