Data Sheet
NINA-B40 series - Data sheet
UBX-19049405 - R04 Pin definition Page 18 of 40
C1 - Public
3 Pin definition
3.1 NINA-B40 series pin assignment
Figure 2 shows an example of the module pin-out in an unconfigured state, where:
The grey pins shown in the center of module are GND pins.
The antenna area of the NINA- B400 and NINA-B406 is highlighted as a dotted line. The four grey
pins in the antenna area are the GND pins that are supported on NINA-B406 only.
Most of the digital or analog functions shown here and described in this data sheet can be freely
assigned to any GPIO pin. Analog functions are limited to analog capable pins.
Signals that are highlighted in red are not freely assignable but are locked to a specific pin.
Some GPIO pins are connected to the pins located close to the radio part of the RF chip. Digital
noise on these pins can reduce the radio sensitivity.
A = Analog function capable pin
Figure 2: NINA-B40 series pin assignment (top view)
⚠ Do not apply an NFC field to the NFC pins when they are configured as GPIOs. Applying the field in
these circumstances can cause permanent damage to the module. When driving different logic
levels on these pins in GPIO mode a small current leakage is expected. Ensure that NFC pins are
set to the same logic level before entering any of the power saving modes. See section 4.2.8 for
more information.
NINA-B4
Top view
TRACE_D1/GPIO_46
TRACE_CLK/GPIO_45
GND
USB_DP
USB_DM
GPIO_52
GPIO_51
GPIO_50
GPIO_49
GPIO_48
GPIO_47
GPIO_42
TRACE_D3/GPIO_33
TRACE_D2/GPIO_32
VBUS
GPIO_41
GPIO_40
GPIO_39
GPIO_38
GPIO_37
GPIO_34
GPIO_35
GPIO_36
GPIO_43
GPIO_44
NINA-B4
Top view
GND
GPIO_27
A
NFC1/GPIO_28
NFC2/GPIO_29
GND
GND
VCC_IO
VCC
RESET_N
SWO/TRACE_D0/GPIO_8
GPIO_25
A
GPIO_24
A
GPIO_23
A
GPIO_20
A
GPIO_18
A
GPIO_17
A
GPIO_16
A
GPIO_4
XL2/GPIO_3
XL1/GPIO_2
GPIO_1
GPIO_5
GPIO_7
GPIO_22
GPIO_21
1
2
3
4
5
7
8
9
10 16
17
18
19
20
21
22
23
24
25
27
2829
15
14131211
6
2630
31 46 45 44 43 42
55 54
53 52
51
50 49 48 47
32
33
34
35
36
41
40
39
38
37
GND
ANT
GND
SWDCLK
SWDIO
1
2
3
4
5
7
8
9
10 16
17
18
19
20
21
22
23
24
25
27
2829
15
14131211
6
2630
31 46 45 44 43 42
55 54
53 52
51
50 49 48 47
32
33
34
35
36
41
40
39
38
37