EVK-NINA-B4 - User guide
UBX-19054587 - R04
Board configuration
Page 21 of 40
C1 - Public
Raspberry Pi HAT
When connecting a HAT to the Raspberry Pi interface, the following jumper configuration can be used.
Depending on how the NINA module is to communicate with a test PC over USB or with the HAT, the
VDD_MCU
net could be left unpowered.
⚠
The
3V3_PI
supply net must only be powered when connecting to a Raspberry Pi expansion board
(HAT). If connecting to a Raspberry Pi board, the jumper must be disconnected.
Figure 13: Jumper configuration when connected to a Raspberry Pi HAT (dashed lines show optional jumpers)
Connector
Add jumper to pins
Description
J7
1,2
Connects the 3V3_PI net to the regulated 3.3 V supply.
7, 8
Selects the board regulated 3.3 V net as a source for the VDD_NINA net.
9, 10
(Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.
J22
1, 3
Powers up the NINA module. The NINA VCC and VCC_IO pins are connected to the
selected source for the VDD_NINA net.
2, 4
(Optional) Powers up the peripherals directly connected to NINA such as LEDs and
external memory with the NINA supply voltage.
Table 7: Jumper configuration when connected to a Raspberry Pi HAT
4.2
Disconnecting NINA signals from board peripherals
All evaluation board peripherals, such as level shifters, LEDs, and the interface MCU are connected to
the NINA-B4 module by default. This might not suit all evaluation scenarios.
All peripherals can be switched off by disconnecting their power supplies (see also
Selecting the power
configuration jumpers
) but finer control is needed to isolate specific signals. Consequently, all NINA
module signals that are connected to board peripherals are routed through jumper headers. In this
way, jumpers can be added or removed to isolate or connect specific signals. Figure 14 shows the
layout of the jumper headers.
J7
B
O
ARD
RA
SP P
I 3V3
3V3
3
4
2
1
J22
V
C
C
_IO
V
C
C
1
2
9
10
NINA module power
board I/O power
(optional)
J22: 2-4
J22: 1-3
PC communication
(optional)
MCU
J7: 9-10
NINA
7
8
DC/DC
EVB powered
J7: 7-8
HAT
Raspberry Pi
expansion board
J7: 1-2
3V3
