NXP Semiconductors
IoT_ZTB
IoT_ZTB-DK006 Development Kit User Guide
UM11393
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2020. All rights reserved.
User Guide
Rev.1.0
— 20 Apr 2020
17 of 21
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
IC2 interface to LPC
10, 11
5
Disabled by default. No current draw if DIOS
10 and 11 are high. Cut JS2 and JS11 to
remove completely
Debug
Interface
12, 13, 14
6
Negligible effect. Cut CH4 to disconnect
RESET and ISP
buttons
5, RST
7
Negligible current drawn if not pressed. See
Table for Sleep current measurement
