NXP Semiconductors
QN9090
QN9090-DK006 Development Kit User Guide
UM11355
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© NXP Semiconductors N.V. 2020. All rights reserved.
User Guide
Rev.1.0
— 15 January 2020
6 of 19
DS5, DS6
Green LEDs connected respectively to UART0_Tx (DS5) and UART0_Rx
(DS6).
DS8
In System Programming (ISP) LED indicator. LED is ON when SW2 button is
pressed.
IC2
Link2 MCU
J2
FTDI serial header. In addition to provide a serial output from QN9090, the
Target side of the board can be powered from the FTDI header. The QN9090
supports serial ISP boot from the FTDI header.
J5
32 pins Expansion header connector for debug. All the QN9090 IOs from
modules and more are available here.
J14
QN9090 VBAT current monitor V sense measurement. The V sense can be
measured with a volt meter. Pin 1 (square pad) is positive and pin 2 is
negative. QN9090 current is calculated by dividing the measured voltage at
J14 by the V
sense resistance value of 3.3Ω.
J15
Link2 mini USB B-type connector. Powers both the Link2 side of the board
and depending on the JP3, J5 configuration, the QN9090 Target side of the
board. Power the board from this connector when using the on-board debug
probe to debug the QN9090 Target MCU.
J1
QN9090 Target SWD disable
– 2-position jumper pins.
1.
Jumper “ON” (default) the QN9090 Target SWD interface enabled.
Normal operating mode where the Target SWD is connected to
either the on-board
2. Link2 debug probe or an external debug probe.
Jumper “OFF”, the
QN9090 Target SWD interface is disabled. Use this setting only
when the on-board Link2 debug probe is used to debug an off-board
Target QN9090.
J2
SWD interface buffer power selection
J3
QN9090 power source selection
1. Jumper fitted in position pin 1 - 2 (default -5V REG). Power source
is either 5V from mini USB connector or FTDI connector, or 4.5V
from 3xAAA batteries or 5V from a 7-12V DC power supply
connected on J4.
2. Jumper fitted in position pin 2 - 3 (BAT 6V). Power source is 4xAAA
batteries.
See details on Board power diagram Figure 5
J4
Jumper to route LPC or FTDI to UART RX0 QN9090 (to change in pair with
JP7)
J5
Link2 (LPC4322) force DFU boot
– 2 position jumper pins.
1. Jumper open (default) or shunted to boot mode for Link2 to follow
the normal boot sequence. The Link2 will boot from internal flash if
image is found there. With the internal flash erased the Link2 normal
boot sequence will fall through to DFU boot.
2. Jumper shunted to force the Link2 to DFU boot mode. Use this
setting to reprogram the Link2 internal flash with a new image or to
use the MCUXpresso IDE with CMSIS-DAP protocol.
J6
JP6 is used to isolate the Link2 debug probe (SPI bridge function) from the
QN9090 target to prevent leakage current in power critical applications /
current consumption analysis. JP6 needs to be fitted in position 1 - 2 to use
the SPI bridging function between the QN9090 and Link2. This jumper is not
fitted by default
J7
Jumper to shunt LPC to QN9090 or FTDI to UART TX0 QN9090 (to change
in pair with JP4)
CN1, CN2,
CN3, CN4
Expansion connectors, including Arduino Uno rev3 compatible connectivity.
JM1, JM2
QN9090 module headers
