NXP Semiconductors
JN5189
JN5189-DK006 Development Kit User Guide
UM11368
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© NXP Semiconductors N.V. 2020. All rights reserved.
User Guide
Rev.1.1
— 28 April 2020
17 of 21
The multimeter will also measure the current take by the VSENSE line. This signal is
used the measure the voltage drop across the 3R3 resistor so that the current
consumption results can be shown from with MCUXpresso. The current taken from this
signal is negligible but can be removed by cutting JS6.
Figure 13 Voltage Sense Circuit
7.4 IO Considerations
If an expansion board is not fitted then the following IO lines are connected on the DK6
board. Setting IOs incorrectly in the software will cause current to be consumed and this
should be taken into consideration when measurement current. The following IOs are
connected.
Function
PIOs
Affected
Schematic
Page
number
Comment
NTAG
10, 11
4
Not connected by default. R45 and R59 are
not fitted by default
User Interface Button
1
4
Leave signal high and do not press switch
DS2 LED
0
4
Leave signal high
DS3 LED
3
4
Leave signal high
QSPI
16, 17, 18,
19, 20, 21
4
Negligible affect if QSPI is not used. To
completely remove any current consumption
either remove IC3 or remove RX1, 3, 4, 7, 9
and RX11 to disconnect all PIOs
Bridge SPI
0, 1, 2, 3, 7
7
Negligible effect. Remove IC18 and IC24
UART
8,9 (UART 0)
0,1 (UART 1)
7
Remove jumpers on JP4 and JP7
