EVK-NINA-B4 - User guide
UBX-19054587 - R03
Board configuration
Page 21 of 38
C1 - Public
Figure 14: Jumper headers J19 and J9 that are used to isolate specific NINA signals
Connector
Pin no.
Schematic net name
Description
J19
1
RESET_N
NINA reset signal, active low
2
RESET_N_I
Connects to the Interface MCU’s reset line
3
SWDIO
SWD data signal
4
SWDIO_I
Interface MCU SWD data signal, used to program/debug the NINA module
5
SWDCLK
SWD clock signal
6
SWDCLK_I
Interface MCU SWD data signal, used to program/debug the NINA module
7
GPIO_8
NINA-B40: GPIO or TRACE, NINA-B41: BLUE signal
8
BLUE
RGB diode blue signal, active low
9
GPIO_7/
SWITCH_1
NINA-B40: GPIO, can be used as either user LED output or push-button input
NINA-B41: SWITCH_1 and GREEN signal
10
GREEN
RGB diode green signal, active low
11
GPIO_1
NINA-B40: GPIO, can be used as user LED output, NINA-B41: RED signal
12
RED
RGB diode red signal, active low
J9
1
GPIO_16/
UART_DTR
NINA-B40: analog capable GPIO signal
NINA-B41: UART DTR output
2
UART_DTR_I
UART to USB DTR signal
3
GPIO_17/
UART_DSR
NINA-B40: analog capable GPIO signal
NINA-B41: UART DSR input
4
UART_DSR_I
UART to USB DSR signal
5
GPIO_20/
UART_RTS
NINA-B40: analog capable GPIO signal
NINA-B41: UART RTS output
6
UART_RTS_I
UART to USB RTS signal
7
GPIO_21/
UART_CTS
NINA-B40: GPIO signal
NINA-B41: UART CTS input
8
UART_CTS_I
UART to USB CTS signal
9
GPIO_22/
UART_TXD
NINA-B40: GPIO signal
NINA-B41: UART TXD output
10
UART_TXD_I
UART to USB TXD signal
11
GPIO_23/
UART_RXD
NINA-B40: analog capable GPIO signal
NINA-B41: UART RXD input
12
UART_RXD_I
UART to USB RXD signal
Table 8: Pinout of the jumper headers - J19 and J9
J9
J19
J9
J19
12
11
2
1
12
11
2
1
RE
S
ET
_M
CU
RE
S
ET
_N
SW
D
IO
S
WD
CLK
GPI
O
_8
GPI
O
_7
GPI
O
_1
GPI
O
_1
6
GPI
O
_1
7
GPI
O
_2
0
GPI
O
_2
1
GPI
O
_2
2
GPI
O
_2
3
S
WD
IO
_M
CU
S
WD
CLK
_M
CU
R
G
B
_B
L
UE
R
G
B
_G
REEN
R
G
B
_RED
U
A
R
T
_D
TR
U
A
R
T
_D
SR
U
A
R
T
_R
T
S
U
A
R
T
_C
TS
U
A
R
T_T
X
D
U
A
R
T
_R
X
D
NINA Signal Jumper Headers
