User's Manual

NINA-B1 series - Data Sheet
UBX-15019243 - R05 Early Production Information Pin definition
Page 17 of 35
No.
Name
I/O
Description
Remarks
1
RED
O
RED system status signal
Active low, should be routed to an RGB LED
2
GPIO_2
I/O
General purpose I/O
3
GPIO_3
I/O
General purpose I/O
4
GPIO_4
I/O
General purpose I/O
5
GPIO_5
I/O
General purpose I/O
6
GND
-
Ground
7
GREEN/SWITCH_1
I/O
This signal is multiplexed:
GREEN: System status signal.
SWITCH_1: Enter bootloader, restore
UART serial settings.
Active low.
GREEN: Should be routed to an RGB LED.
SWITCH_1: Can be held low during reset and released
during/after boot to either enter bootloader or restore
serial settings. See section 2.7 for more information.
8
BLUE
O
BLUE system status signal
Active low, should be routed to an RGB LED
9
VCC_IO
I
Module I/O level voltage input
Must be connected to VCC on NINA-B1
10
VCC
I
Module supply voltage input
1.7-3.6 V range
11
RSVD
-
RESERVED pin
Leave unconnected
12
GND
-
Ground
13
ANT
I/O
Tx/Rx antenna interface
50 Ω nominal characteristic impedance, only used
with NINA-B111 modules
14
GND
-
Ground
15
RSVD
-
RESERVED pin
Leave unconnected
16
UART_DTR
O
UART data terminal ready signal
Used to indicate system status
17
UART_DSR
I
UART data set ready signal
Used to change system modes
18
SWITCH_2
I
Connect to peripheral device
Active low, see section 2.7 for more information
19
RESET_N
I
External system reset input
Active low
20
UART_RTS
O
UART request to send control signal
Used only when hardware flow control is enabled
21
UART_CTS
I
UART clear to send control signal
Used only when hardware flow control is enabled
22
UART_TXD
O
UART data output
23
UART_RXD
I
UART data input
Pin is analog capable
24
GPIO_24
I/O
General purpose I/O
Pin is analog capable
25
GPIO_25
I/O
General purpose I/O
Pin is analog capable
26
GND
-
Ground
27
GPIO_27
I/O
Analog function enabled GPIO
Pin is analog capable
28
NFC1/GPIO_28
I/O
NFC pin 1 (default)
May be used as a GPIO
29
NFC2/GPIO_29
I/O
NFC pin 2 (default)
May be used as a GPIO
30
GND
-
Ground
Table 8: NINA-B1 series NINA-B11x firmware pin-out