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1.3 I/O allocation
The block diagram in Figure 4 provides a better understanding of how I/O signals from the module are
made available at connectors and/or interfaces of the EVK.
Sixteen (16) I/O signals (on EVK-NINA-W1x6 17 signals) are available at the middle row of the I/O
allocator. These signals can be distributed to connectors and/or interfaces on the EVK by use of
jumpers to connect the associated middle and outer row pin(s).
The signals IO-12, IO-13, IO-14 and IO-15 can be disconnected from the J4 connector by not
populating the corresponding jumpers at J18. This can be useful if the SDIO signals D2, D3, CLK, and
CMD are directed to the SD card reader (J19).
Signals on the module not connected to any circuits (interfaces, LEDs and switches etc) on the board
are connected directly to J1, J2, J3 or J4 connector.
* Available only on EVK-NINA-W1x6.
Figure 4: Block diagram of EVK-NINA-W10
☞
When reset-n is released, the module pin 27 (IO-0) is read as boot-n (firmware upgrade). When IO-
0 is connected to the module, it must be high during start up for normal operation.
☞
On EVK-NINA-W1x6 the Micro-SD card is placed on the bottom side. Additionally, the NINA-W1x6
module and the J25/J26 and GND pins have changed places.
UBX-17011007 - R08
C1-Public
EVK-NINA-W1/EVK-NINA-B2 - User guide
Product description
Page 7 of 27
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