EVK-NINA-B4 - User guide
UBX-19054587 - R04
Interfaces and peripherals
Page 29 of 40
C1 - Public
Conn.
Pin
No.
Raspberry
Pi pin
Description
Schematic
net name
nRF52
pin
Alternate functions and notes
Connected to 32Khz LPO clock.
To connect GPIO 2 to J4 header instead of
LPO clock, remove R66 and add R64 (0
Ω
resistor)
12
GPIO18
Digital I/O
GPIO_1
P0.13
13
GPIO27
Digital I/O
GPIO_52
P0.08 Connected to NINA through a solder bridge,
if the solder bridge is cut this pin will be left
floating
14
GND
Ground
GND
GND
15
GPIO22
Digital I/O
GPIO_51
P1.08 Connected to NINA through a solder bridge,
if the bridge is cut this pin will be left
floating
16
GPIO23
Digital I/O
GPIO_50
P0.20 Connected to NINA through a solder bridge,
if the bridge is cut this pin will be left
floating
17
3.3 V
3.3 V supply pin
3V3_PI
-
Not connected by default. See also
Powering options
18
GPIO24
Digital I/O
GPIO_49
P0.22 Connected to NINA through a solder bridge,
if the bridge is cut this pin will be left
floating
19
GPIO10
Digital I/O
GPIO_48
P0.21 Connected to NINA through a solder bridge,
if the bridge is cut this pin will be left
floating
20
GND
Ground
GND
GND
21
GPIO09
Digital I/O
GPIO_47
P0.06 Connected to NINA through a solder bridge,
if the bridge is cut this pin will be left
floating
22
GPIO25
Digital I/O
GPIO_46
P0.12
23
GPIO11
Digital I/O
GPIO_45
P0.07
24
GPIO08
Digital I/O
GPIO_44
P0.27
25
GND
Ground
GND
GND
26
GPIO07
Digital I/O
GPIO_43
P0.15
27
ID_SD
EEPROM config I2C data
signal
GPIO_42
P0.26 Should only be used to read or simulate
HAT EEPROMs. See also
EEPROM support
.
28
ID_SC
EEPROM config I2C clock
signal
GPIO_41
P1.03 Should only be used to read or simulate
HAT EEPROMs See also
EEPROM support
.
29
GPIO05
Digital I/O
GPIO_40
P0.19
30
GND
Ground
GND
GND
31
GPIO06
Digital I/O
GPIO_39
P1.07
32
GPIO12
Digital I/O
GPIO_38
P0.25
33
GPIO13
Digital I/O
GPIO_37
P1.06
34
GND
Ground
GND
GND
35
GPIO19
Digital I/O
GPIO_36
P1.02
36
GPIO16
Digital I/O
GPIO_35
P1.04
37
GPIO26
Digital I/O
GPIO_34
P0.14
38
GPIO20
Digital I/O
GPIO_33
P1.09
39
GND
Ground
GND
GND
40
GPIO21
Digital I/O
GPIO_32
P0.11
Table 14: Pinout of the Raspberry Pi compatible interface