SECURITY
STATUS
NXP Semiconductors
QN908x
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All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2014. All rights reserved.
Application note
Rev. <MM.mm> — 27 April 2016
6 of 33
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.
