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. See Table 1 for more information about this.

QIAA pin assignments

This section describes the pin assignment and the pin functions.

Figure 1. QIAA pin assignments, top view

Table 1. QIAA pin assignments
Pin Name Function Description Recommended usage
A8

P0.31

AIN7

Digital I/O

Analog input

General purpose I/O

Analog input

Standard drive, low frequency I/O only.
A10

P0.29

AIN5

Digital I/O

Analog input

General purpose I/O

Analog input

Standard drive, low frequency I/O only.
A12

P0.02

AIN0

Digital I/O

Analog input

General purpose I/O

Analog input

Standard drive, low frequency I/O only.
A14 P1.15 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
A16 P1.13 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
A18 DEC2 Power 1.3 V regulator supply decoupling (Radio supply)  
A20 P1.10 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
A22 VDD Power Power supply  
A23 XC2 Analog input Connection for 32 MHz crystal.  
B1 VDD Power Power supply  
B3 DCC Power DC/DC converter output  
B5 DEC4 Power 1.3 V regulator supply decoupling  
B7 VSS Power Ground  
B9

P0.30

AIN6

Digital I/O

Analog input

General purpose I/O

Analog input

Standard drive, low frequency I/O only.
B11

P0.28

AIN4

Digital I/O

Analog input

General purpose I/O

Analog input

Standard drive, low frequency I/O only.
B13

P0.03

AIN1

Digital I/O

Analog input

General purpose I/O

Analog input

Standard drive, low frequency I/O only.
B15 P1.14 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
B17 P1.12 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
B19

P0.11

TRACEDATA2

Digital I/O

Trace data

General purpose I/O pin.

Trace buffer TRACEDATA[2].

Standard drive, low frequency I/O only.
B24 XC1 Analog input Connection for 32 MHz crystal  
C1 DEC1 Power 1.1 V regulator supply decoupling  
D2

P0.00

XL1

Digital I/O

Analog input

General purpose I/O

Connection for 32.768 kHz crystal

 
D23 DEC3 Power Power supply, decoupling  
E24 DEC6 Power 1.3 V regulator supply decoupling (Radio supply)  
F2

P0.01

XL2

Digital I/O

Analog input

General purpose I/O

Connection for 32.768 kHz crystal

 
F23 VSS_PA Power Ground (Radio supply)  
G1 P0.26 Digital I/O General purpose I/O  
H2 P0.27 Digital I/O General purpose I/O  
H23 ANT RF Single-ended radio antenna connection See Reference circuitry for guidelines on how to ensure good RF performance.
J1

P0.04

AIN2

Digital I/O

Analog input

General purpose I/O

Analog input

 
J24

P0.10

NFC2

Digital I/O

NFC input

General purpose I/O

NFC antenna connection

Standard drive, low frequency I/O only.

K2

P0.05

AIN3

Digital I/O

Analog input

General purpose I/O

Analog input

 
L1 P0.06 Digital I/O General purpose I/O  
L24

P0.09

NFC1

Digital I/O

NFC input

General purpose I/O

NFC antenna connection

Standard drive, low frequency I/O only.

M2

P0.07

TRACECLK

Digital I/O

Trace clock

General purpose I/O pin

Trace buffer clock

 
N1 P0.08 Digital I/O General purpose I/O  
N24 DEC5 Power 1.3 V regulator supply decoupling (flash supply)  
P2 P1.08 Digital I/O General purpose I/O  
P23 P1.07 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
R1

P1.09

TRACEDATA3

Digital I/O

Trace data

General purpose I/O pin.

Trace buffer TRACEDATA[3].

 
R24 P1.06 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
T2 P0.11 Digital I/O General purpose I/O  
T23 P1.05 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
U1

P0.12

TRACEDATA1

Digital I/O

Trace data

General purpose I/O pin.

Trace buffer TRACEDATA[1].

 
U24 P1.04 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
V23 P1.03 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
W1 VDD Power Power supply  
W24 P1.02 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
Y2 VDDH Power High voltage power supply  
Y23 P1.01 Digital I/O General purpose I/O Standard drive, low frequency I/O only.
AA24 SWDCLK Debug Serial wire debug clock input for debug and programming  
AB2 DCCH Power DC/DC converter output  
AC5 DECUSB Power Decoupling for USB 3.3 V  
AC9 P0.14 Digital I/O General purpose I/O  
AC11 P0.16 Digital I/O General purpose I/O  
AC13

P0.18

nRESET

Digital I/O

General purpose I/O

Configurable as system RESET

QSPI/CSN
AC15 P0.19 Digital I/O General purpose I/O QSPI/SCK
AC17 P0.21 Digital I/O General purpose I/O QSPI
AC19 P0.23 Digital I/O General purpose I/O QSPI
AC21 P0.25 Digital I/O General purpose I/O  
AC24 SWDIO Debug Debug serial data  
AD2 VBUS Power 5 V input for USB 3.3 V regulator  
AD4 D- Digital I/O USB D- USB
AD6 D+ Digital I/O USB D+ USB
AD8 P0.13 Digital I/O General purpose I/O  
AD10 P0.15 Digital I/O General purpose I/O  
AD12 P0.17 Digital I/O General purpose I/O  
AD14 VDD Power Power supply  
AD16 P0.20 Digital I/O General purpose I/O  
AD18 P0.22 Digital I/O General purpose I/O QSPI
AD20 P0.24 Digital I/O General purpose I/O  
AD22

P1.00

TRACEDATA0

Digital I/O

Trace data

General purpose I/O pin.

Trace buffer TRACEDATA[0].

Serial wire output (SWO).

QSPI
AD23 VDD Power Flash supply pad  
Bottom of chip  
Die pad VSS Power Ground pad. Exposed die pad must be connected to ground (VSS) for proper device operation.  
Important: For more information on Standard drive, see GPIO — General purpose input/output. Low frequency I/O is signals with a frequency up to 10 kHz.

Documentation feedback | Developer Zone | Updated 2017-07-06