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UBX-21008123 - R02 Interfaces and peripherals Page 30 of 42
C1-Public
Conn. Pin
No. Raspberry
Pi pin Description Schematic
net name nRF52
pin Alternate functions and notes
8 GPIO14 Digital I/O, UART TX/RX RASP_TXD P0.02 Connected to ANNA UART_RXD pin by
default. See also
UART .
9 GND Ground GND GND
10 GPIO15 Digital I/O, UART RX/TX RASP_RXD P0.03 Connected to ANNA UART_TXD pin by
default. See also
UART
11 GPIO17 Digital I/O - - N/C
12 GPIO18 Digital I/O RESET_N P0.18
13 GPIO27 Digital I/O IO_13 P1.09
14 GND Ground GND GND
15 GPIO22 Digital I/O IO_17 P0.00 Can be connected to IO_17 via 0
Ω
resistor.
Resistor not mounted by default. IO_17 is
connected to 32.768 LPO crystal by default
16 GPIO23 Digital I/O IO_16 P1.00
17 3.3 V 3.3 V supply pin 3V3_PI - Not connected by default, see section 4.1
18 GPIO24 Digital I/O IO_18 P0.01
19 GPIO10 Digital I/O IO_11 P0.14
20 GND Ground GND GND
21 GPIO09 Digital I/O IO_22 P0.09 Can be connected to IO_22 via 0
Ω
resistor.
Resistor not mounted by default. IO_22 is
connected to NFC antenna by default
22 GPIO25 Digital I/O IO_23 P0.10 Can be connected to IO_23 via 0
Ω
resistor.
Resistor not mounted by default. IO_23 is
connected to NFC antenna by default
23 GPIO11 Digital I/O IO_26 P0.21
24 GPIO08 Digital I/O IO_49 P0.17
25 GND Ground GND GND
26 GPIO07 Digital I/O IO_50 P0.08
27 ID_SD EEPROM config I2C data
signal IO_47 P1.07 Can only be used to read or simulate HAT
EEPROMs. See also
EEPROM support .
28 ID_SC EEPROM config I2C clock
signal IO_51 P1.01 Can only be used to read or simulate HAT
EEPROMs See also
EEPROM support .
29 GPIO05 Digital I/O IO_31 P0.27
30 GND Ground GND GND
31 GPIO06 Digital I/O IO_33 P0.26
32 GPIO12 Digital I/O IO_32 P0.06
33 GPIO13 Digital I/O UART_RTS P0.16
34 GND Ground GND GND
35 GPIO19 Digital I/O UART_CTS P0.22
36 GPIO16 Digital I/O IO_52 P0.13
37 GPIO26 Digital I/O IO_39 P0.23
38 GPIO20 Digital I/O IO_10 P0.20
39 GND Ground GND GND
40 GPIO21 Digital I/O IO_48 P0.07
Table 13: Pinout of the Raspberry Pi compatible interface