NXP Semiconductors
UM11079
IoT Module base board
UM11079_OM40006.docm
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User manual
Rev. 1.0
— March 20, 2018
7 of 23
Circuit ref
Description
Ref section
JP3 & JP4
USB0 host / Ethernet TXD/RXD selection
Due to sharing of pin functionality on this development board, it is
not possible to support the Ethernet port and USB0 overcurrent
feature (USB0 in Host mode) simultaneously. For both JP3 and
JP4:
Install jumper in position 1-2 to enable Ethernet (Default)
Install jumper in position 2-3 for USB hosting capability
6.3
JP5
Power measurement
This set of 3 jumpers control various selections for power
measurement:
Position 1-2 and 3-4 are in parallel with 1 ohm resistors. Current
can be measured across these jumper headers to determine
current flow into the Module.
Position 5-6 (installed by default) can be left open and a current
meter connected between these pins to directly measure current
flow into the Module.
5
JP6
Link2 DFU boot control
Link2 (LPC43xx) force DFU boot
– 2 position jumper pins.
1) Jumper open (default) for Link2 to follow the normal boot
sequence. The Link2 will boot from internal flash if image is found
there. With the internal flash erased the Link2 normal boot
sequence will fall through to DFU boot.
Jumper shunted to force the Link2 to DFU boot mode. Use this
setting to reprogram the Link2 internal flash with a new image
(using the LPCScrypt utility) or to use the MCUXpresso IDE with
CMSIS-DAP protocol.
Note that the OM40006 Link2 flash is pre-programmed with a
version of CMSIS-DAP firmware by default.
4
JP7
UART Bridge / P4 Header selector
.
When open (default), the “Bridge” (or VCOM) UART connections
from the Link2 probe are driven to the Module.
Install JP7 when using the UART header connector at P4. Note
that this disables the Debug Probe UART bridge probe
connections.
6.1
JP8
(not fitted by
default)
JP8 may be fitted to provide a convenient way to enable/disable
the reset signal to/from the Module connector P6 (pin 22). Solder
jumper JS21 should be removed if JP8 is to be used.
Refer to
schematic
JP9 (not
fitted by
default)
This header provides a convenient connection point to provide
external ADC positive and negative voltages (if supported by
Module).
See
Schematic
Board LED and button functions, and connectors are described in Table 2 below.
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