NXP Semiconductors
UM11079
IoT Module base board
UM11079_OM40006.docm
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© NXP B.V. 2017, 2018. All rights reserved.
User manual
Rev. 1.0
— March 20, 2018
15 of 23
Pin
Function
3
TXD (from Module)
6.2 USB Full Speed port (USB0)
The Full Speed (FS) USB port from the installed Module is connected to micro AB USB
connector J2. This section describes functionality support by this port and associated
jumper settings.
6.2.1 Device mode
The FS port supports USB device mode operation; no jumper settings are needed to
configure this mode. When using the port in device mode, a standard micro USB cable
can be used.
6.2.2 Host mode
The FS port supports USB device mode operation but, due to sharing of some signals
and power supply circuitry, requires the following settings:
•
Connect ex5V power via USB connector J1. This is required for the FS
USB port to be able to power the devices connected to it.
•
Install JP1 in position 1-2 (labelled BB) to c5V from J1 as the source of
VBUS (this is the default position.)
•
Install a jumper in position 2-3 of JP3 and JP4 to select USB0 host operation
(default is position 1-2, which selects Ethernet operation.)
•
Use of a micro AB adaptor to connect an external USB device may be required,
as most USB device have either a type A or micro B connector.
Note that the Ethernet functions are disabled when the board is configured for FS USB
Host operation.
6.3 USB High Speed ports
Note that modules (such as the LPC54018 IoT Module) with an additional USB ports are
only available on the Module itself.
6.4 PMod compatible Expansion Header (J8)
This header provides connectivity from the Module to a remote Host, peripherals or other
devices. The table below shows the connections (LPC54018 IoT Module connections in
parenthesis).
Table 4.
Host Expansion Header signals
Pin
J8 signal
Expansion port connection
1
GPIO/SPI-SSELn1 or n0 in/out
P6 pin 89 (P4_6) default JS3 position (1-2)
or P5 pin 15 (P3_30) if JS3 moved to position 2-3
2
GPIO/SPI-MOSI in/out
P5 pin 9 (P3_21)
3
GPIO/SPI-MISO out/in
P5 pin 11 (P3_22)
4
GPIO/SPI-SCK in/out
P5 pin 13 (P3_20)
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