NXP Semiconductors
QN9090
QN9090-DK006 Development Kit User Guide
UM11355
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User Guide
Rev.1.0
— 15 January 2020
7 of 19
P1
10-pin SWD connector
– The SWD connector is used to debug the QN9090
Target from an external debug probe. The same SWD connector can also be
used to connect the on-board Link2 debug probe to an off-board target MCU
(for this JP1 must be shunted).
BP1
User Interface button connected to IO1. Used in some Applications Notes.
SW2
In System Programming (ISP) button. QN9090 will enter ISP mode when
SW2 is pressed during hardware reset.
SW4
QN9090 Reset pushbutton.
To ease the board usage and any debug the connectors serigraphy is also copied on PCB bottom.
J7, J13, J12 & J11 battery slots are also here
.
2.3 LED indicators
The DK6 board LED location are shown in Figure 3. A description of each on-board LED
indicator is shown in next table
Table 2. LED indicator functions
LED reference
Description
D1
Link2 MCU BOOT0_LED indicator. Reflects the state of Link2 MCU
P1_1. When the boot process fails, D1 will toggle at a 1 Hz rate for 60
seconds. After 60 seconds, the Link2 MCU is reset. It will be ON when
the Link2 MCU is Booting using DFU (See description for JP5).
DS1
QN9090 Power LED. This LED is on any time power is applied to the
QN9090 wireless MCU.
DS2, DS3
2x Red debug LEDs connected respectively to QN9090 PIO_0 (DS2)
and PIO_3 (DS3). LEDs are on anytime the respective PIOs from the
QN9090 are pulled low.
DS4
QN9090 Reset LED
– LED is on anytime the Target RESET is pulled
Figure 4 OM15076 DK6 PCB bottom view
