Pin assignments

This section describes the pin assignment and the pin functions.

This device provides flexibility when it comes to routing and configuration of the GPIO pins. However, some pins have recommendations for how the pin should be configured or what it should be used for.

In addition to the information in the pin-out tables for the respective packages, the following peripherals have dedicated pins that should be used for proper operation:

For all high-speed signals, printed circuit board (PCB) layout must ensure that connections are made using short PCB traces. Refer to the manufacturer's PCB design recommendations for additional information.

aQFN94 pin assignments

Figure 1. aQFN94 pin assignments, top view

Table 1. aQFN94 pin assignments
Pin Name Function Description
A5 VBUS Power 5 V input for USB 3.3 V regulator
A13 DECA Power Analog regulator supply decoupling
A15 DECD Power Digital regulator supply decoupling
A17 P1.13 Digital I/O General purpose I/O
A19 VDD Power Power supply
A21 DCCR Power DC/DC converter output
A23 DECN Power Regulator supply decoupling
A27 DECR Power Regulator supply decoupling
B2 D+ Digital I/O USB D+
B4 D- Digital I/O USB D-
B6 DECUSB Power USB 3.3 V regulator supply decoupling
B8 VDD Power Power supply
B10 DCCD Power DC/DC converter output
B14 P1.15 Digital I/O General purpose I/O
B16 P1.14 Digital I/O General purpose I/O
B18 P1.12 Digital I/O General purpose I/O
B20 P1.11 Digital I/O General purpose I/O
B22 P0.31 Digital I/O General purpose I/O
B24 P0.30 Digital I/O General purpose I/O
B28 VDD Power Power supply
B30 XC2 Analog input Connection for 32 MHz crystal
C1 VDD Power Power supply
C31 XC1 Analog input Connection for 32 MHz crystal
E1 VDDH Power Power supply
E31 VDD Power Power supply
G31 DECRF Power RADIO power supply decoupling
J1 DCCH Power DC/DC converter output
L1 VDD Power Power supply
L31 ANT RF Single-ended antenna connection
M2 P1.00 Digital I/O General purpose I/O
N1

P0.00
XL1

Digital I/O
Analog input

General purpose I/O
Connection for 32 kHz crystal

N31 VDD Power Power supply
P2 P1.01 Digital I/O General purpose I/O
R1

P0.01
XL2

Digital I/O
Analog input

General purpose I/O
Connection for 32 kHz crystal

R31 P1.10 Digital I/O General purpose I/O
U1 VDD Power Power supply
U31 P0.29 Digital I/O General purpose I/O
V2

P0.04
AIN0

Digital I/O
Analog input

General purpose I/O
Analog input

W1

P0.02
NFC1

Digital I/O
NFC input

General purpose I/O
NFC antenna connection

W31 SWDCLK Debug Serial wire debug clock input for debug and programming
Y2

P0.05
AIN1

Digital I/O
Analog input

General purpose I/O
Analog input

AA1

P0.03
NFC2

Digital I/O
NFC input

General purpose I/O
NFC antenna connection

AA31 SWDIO Debug Serial wire debug I/O for debug and programming
AB2

P0.06
AIN2

Digital I/O
Analog input

General purpose I/O
Analog input

AC1 VDD Power Power supply
AC31 nRESET Reset Pin RESET with internal pull-up resistor
AD2

P0.07
AIN3

Digital I/O
Analog input

General purpose I/O
Analog input

AE1

P1.02
TWI

Digital I/O
TWI 1 Mbps

General purpose I/O
High-speed pin for 1 Mbps TWI

AE31

P0.28
AIN7

Digital I/O
Analog input

General purpose I/O
Analog input

AF2

P1.03
TWI

Digital I/O
TWI 1 Mbps

General purpose I/O
High-speed pin for 1 Mbps TWI

AG1 VDD Power Power supply
AG31 DECF Power Regulator supply decoupling
AH2

P0.08
TRACEDATA3
SCK

Digital I/O
Trace data
SCK for SPIM4

General purpose I/O
Trace buffer TRACEDATA[3]
Dedicated pin for high-speed SPI

AJ1

P0.09
TRACEDATA2
MOSI

Digital I/O
Trace data
MOSI for SPIM4

General purpose I/O
Trace buffer TRACEDATA[2]
Dedicated pin for high-speed SPI

AJ31 VDD Power Power supply
AK2

P0.10
TRACEDATA1
MISO

Digital I/O
Trace data
MISO for SPIM4

General purpose I/O
Trace buffer TRACEDATA[1]
Dedicated pin for high-speed SPI

AK4

P0.11
TRACEDATA0
CSN

Digital I/O
Trace data
CSN for SPIM4

General purpose I/O
Trace buffer TRACEDATA[0]
Dedicated pin for high-speed SPI

AK6

P0.12
TRACECLK
DCX

Digital I/O
Trace clock
DCX for SPIM4

General purpose I/O
Trace buffer clock
Dedicated pin for high-speed SPI

AK8

P0.14
IO1

Digital I/O
IO1 for QSPI

General purpose I/O
Dedicated pin for Quad SPI

AK10

P0.15
IO2

Digital I/O
IO2 for QSPI

General purpose I/O
Dedicated pin for Quad SPI

AK12

P0.17
SCK

Digital I/O
SCK for QSPI

General purpose I/O
Dedicated pin for Quad SPI

AK14

P0.18
CSN

Digital I/O
CSN for QSPI

General purpose I/O
Dedicated pin for Quad SPI

AK16 P0.20 Digital I/O General purpose I/O
AK18 P0.22 Digital I/O General purpose I/O
AK20 P0.23 Digital I/O General purpose I/O
AK22 P1.05 Digital I/O General purpose I/O
AK24 P1.07 Digital I/O General purpose I/O
AK26 P1.09 Digital I/O General purpose I/O
AK28

P0.25
AIN4

Digital I/O
Analog input

General purpose I/O
Analog input

AK30

P0.27
AIN6

Digital I/O
Analog input

General purpose I/O
Analog input

AL3 VDD Power Power supply
AL5

P0.13
IO0

Digital I/O
IO0 for QSPI

General purpose I/O
Dedicated pin for Quad SPI

AL7 VDD Power Power supply
AL9

P0.16
IO3

Digital I/O
IO3 for QSPI

General purpose I/O
Dedicated pin for Quad SPI

AL11 VDD Power Power supply
AL13 P0.19 Digital I/O General purpose I/O
AL15 P0.21 Digital I/O General purpose I/O
AL17 VDD Power Power supply
AL19 P1.04 Digital I/O General purpose I/O
AL21 P1.06 Digital I/O General purpose I/O
AL23 P1.08 Digital I/O General purpose I/O
AL25 VDD Power Power supply
AL27 P0.24 Digital I/O General purpose I/O
AL29

P0.26
AIN5

Digital I/O
Analog input

General purpose I/O
Analog input

Bottom of chip
Die pad VSS Power Ground pad. Exposed die pad must be connected to ground (VSS) for proper device operation.

This document was last updated on
2019-12-09.
Please send us your feedback about the documentation! For technical questions, visit the Nordic Developer Zone.