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 pinout tables for the respective packages, the following peripherals have dedicated pins that should be used for proper operation:
GPIO pin | Description |
---|---|
P0.08 - P0.12 | Drive configuration E0E1 is available and must be used for TRACE. For 32 Mbps high-speed SPI using SPIM4, drive configuration H0H1 must be used. |
P0.13 - P0.18 | The H0H1 drive configuration features the highest speeds of quad SPI using the direct connection of the QSPI peripheral. |
P1.02 and P1.03 | The E0E1 drive configuration activates a 20 mA open-drain driver specifically designed for high-speed TWI. |
Remaining pins | The E0E1 drive configuration is not supported. Using the E0E1 drive configuration will cause incorrect operation. |
For all high-speed signals, the 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.
The aQFN94 package has 94 pins in addition to four corner pads and a die pad.
Pin | Name | Function | Description | Recommended usage |
---|---|---|---|---|
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 | DCC | Power | DC/DC converter output | |
A23 | DECN | Power | Regulator supply decoupling | |
A25 | N.C. | |||
A27 | DECR | Power | Regulator supply decoupling | |
B2 | D+ | USB | USB D+ | |
B4 | D- | USB | USB D- | |
B6 | DECUSB | Power | USB 3.3 V regulator supply decoupling | |
B8 | VDD | Power | Power supply | |
B10 | DCCD | Power | DC/DC converter output | |
B12 | N.C. | |||
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 | |
B26 | N.C. | |||
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 | |
D2 | N.C. | |||
E1 | VDDH | Power | Power supply | |
E31 | VDD | Power | Power supply | |
F2 | N.C. | |||
G1 | N.C. | |||
G31 | DECRF | Power | RADIO power supply decoupling | |
H2 | N.C. | |||
J1 | DCCH | Power | DC/DC converter output | |
J31 | N.C. | |||
K2 | N.C. | |||
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 |
Digital I/O |
General purpose I/O |
|
N31 | VDD | Power | Power supply | |
P2 | P1.01 | Digital I/O | General purpose I/O | |
R1 |
P0.01 |
Digital I/O |
General purpose I/O |
|
R31 | P1.10 | Digital I/O | General purpose I/O | |
T2 | N.C. | |||
U1 | VDD | Power | Power supply | |
U31 | P0.29 | Digital I/O | General purpose I/O | |
V2 |
P0.04 |
Digital I/O |
General purpose I/O |
|
W1 |
P0.02 |
Digital I/O |
General purpose I/O |
|
W31 | SWDCLK | Debug | Serial wire debug clock input for debug and programming | |
Y2 |
P0.05 |
Digital I/O |
General purpose I/O |
|
AA1 |
P0.03 |
Digital I/O |
General purpose I/O |
|
AA31 | SWDIO | Debug | Serial wire debug I/O for debug and programming | |
AB2 |
P0.06 |
Digital I/O |
General purpose I/O |
|
AC1 | VDD | Power | Power supply | |
AC31 | nRESET | Reset | Pin RESET with internal pull-up resistor | |
AD2 |
P0.07 |
Digital I/O |
General purpose I/O |
|
AE1 |
P1.02 |
Digital I/O |
General purpose I/O |
TWI |
AE31 |
P0.28 |
Digital I/O |
General purpose I/O |
|
AF2 |
P1.03 |
Digital I/O |
General purpose I/O |
TWI |
AG1 | VDD | Power | Power supply | |
AG31 | N.C. | |||
AH2 |
P0.08 |
Digital I/O |
General purpose I/O |
Trace, SPIM4 |
AJ1 |
P0.09 |
Digital I/O |
General purpose I/O |
Trace, SPIM4 |
AJ31 | VDD | Power | Power supply | |
AK2 |
P0.10 |
Digital I/O |
General purpose I/O |
Trace, SPIM4 |
AK4 |
P0.11 |
Digital I/O |
General purpose I/O |
Trace, SPIM4 |
AK6 |
P0.12 |
Digital I/O |
General purpose I/O |
Trace, SPIM4 |
AK8 |
P0.14 |
Digital I/O |
General purpose I/O |
QSPI |
AK10 |
P0.15 |
Digital I/O |
General purpose I/O |
QSPI |
AK12 |
P0.17 |
Digital I/O |
General purpose I/O |
QSPI |
AK14 |
P0.18 |
Digital I/O |
General purpose I/O |
QSPI |
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 |
Digital I/O |
General purpose I/O |
|
AK30 |
P0.27 |
Digital I/O |
General purpose I/O |
|
AL3 | VDD | Power | Power supply | |
AL5 |
P0.13 |
Digital I/O |
General purpose I/O |
QSPI |
AL7 | VDD | Power | Power supply | |
AL9 |
P0.16 |
Digital I/O |
General purpose I/O |
QSPI |
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 |
Digital I/O |
General purpose I/O |
|
Corner pads | ||||
A1 | N.C. | |||
A31 | N.C. | |||
AL1 | N.C. | |||
AL31 | N.C. | |||
Bottom of chip | ||||
Die pad | VSS | Power | Ground pad. Exposed die pad must be connected to ground (VSS) for proper device operation. |
Pin | Name | Function | Description | Recommended usage |
---|---|---|---|---|
A1 | XC1 | Analog input | Connection for 32 MHz crystal | |
A2 | XC2 | Analog input | Connection for 32 MHz crystal | |
A3 | VDD | Power | Power supply | |
A5 | VSS | Power | Ground | |
A7 | DECD | Power | Regulator supply decoupling | |
A9 | DCCD | Power | DC/DC converter output | |
A11 | D- | USB | USB D- | |
A12 | D+ | USB | USB D+ | |
B1 | DECRF | Power | RADIO power supply decoupling | |
B2 | VSS | Power | Ground | |
B4 | DECR | Power | Regulator supply decoupling | |
B5 | DECN | Power | Regulator supply decoupling | |
B6 | DCC | Power | DC/DC converter output | |
B7 | VDD | Power | Power supply | |
B8 | DECA | Power | Regulator supply decoupling | |
B9 | VSS | Power | Ground | |
B10 | VDD | Power | Power supply | |
B11 | VBUS | Power | Power | |
B12 | VDDH | Power | Power supply | |
C2 | VSS | Power | Ground | |
C4 | P0.30 | Digital I/O | General purpose I/O | |
C5 | P0.31 | Digital I/O | General purpose I/O | |
C6 | P1.11 | Digital I/O | General purpose I/O | |
C7 | P1.12 | Digital I/O | General purpose I/O | |
C8 | P1.13 | Digital I/O | General purpose I/O | |
C9 | P1.14 | Digital I/O | General purpose I/O | |
C10 | P1.15 | Digital I/O | General purpose I/O | |
C11 | DECUSB | Power | USB 3.3 V regulator supply decoupling | |
D1 | ANT | RF | Single-ended antenna connection | |
D2 | VDD | Power | Power supply | |
D10 | P1.00 | Digital I/O | General purpose I/O | |
D11 | DCCH | Power | DC/DC converter output | |
D12 | VSS | Power | Ground | |
E2 | P0.29 | Digital I/O | General purpose I/O | |
E3 | P0.28 |
Digital I/O |
General purpose I/O |
|
E4 | P1.10 | Digital I/O | General purpose I/O | |
E5 | VSS | Power | Ground | |
E6 | VSS | Power | Ground | |
E7 | VSS | Power | Ground | |
E8 | VSS | Power | Ground | |
E10 | P1.01 | Digital I/O | General purpose I/O | |
E11 | VDD | Power | Power supply | |
F1 | SWDIO | Debug | Serial wire debug I/O for debug and programming | |
F2 | SWDCLK | Debug | Serial wire debug clock input for debug and programming | |
F3 | P1.08 | Digital I/O | General purpose I/O | |
F5 | VSS | Power | Ground | |
F6 | VSS | Power | Ground | |
F7 | VSS | Power | Ground | |
F8 | VSS | Power | Ground | |
F10 | P0.05 |
Digital I/O |
General purpose I/O |
|
F11 | P0.00 |
Digital I/O |
General purpose I/O |
|
F12 | P0.01 |
Digital I/O |
General purpose I/O |
|
G2 | nRESET | Reset | Pin RESET with internal pull-up resistor | |
G3 | P1.07 | Digital I/O | General purpose I/O | |
G5 | AVSS | Power | Ground | |
G6 | VSS | Power | Ground | |
G7 | VSS | Power | Ground | |
G8 | VSS | Power | Ground | |
G10 | P0.04 |
Digital I/O |
General purpose I/O |
|
G11 | P0.02 |
Digital I/O |
General purpose I/O |
|
H1 | P0.27 |
Digital I/O |
General purpose I/O |
|
H2 | P1.09 | Digital I/O | General purpose I/O | |
H3 | P0.23 | Digital I/O | General purpose I/O | |
H10 | P0.06 |
Digital I/O |
General purpose I/O |
|
H11 | VDD | Power | Power supply | |
H12 | P0.03 |
Digital I/O |
General purpose I/O |
|
J2 | P0.26 |
Digital I/O |
General purpose I/O |
|
J3 | P1.06 | Digital I/O | General purpose I/O | |
J4 | P0.21 | Digital I/O | General purpose I/O | |
J5 | P0.19 | Digital I/O | General purpose I/O | |
J6 | P0.12 |
Digital I/O |
General purpose I/O |
|
J7 | P0.11 |
Digital I/O |
General purpose I/O |
Trace, SPIM4 |
J8 | P0.10 |
Digital I/O |
General purpose I/O |
Trace, SPIM4 |
J9 | P0.09 |
Digital I/O |
General purpose I/O |
Trace, SPIM4 |
J10 | P0.07 |
Digital I/O |
General purpose I/O |
|
J11 | P1.02 |
Digital I/O |
General purpose I/O |
TWI |
K1 | VDD | Power | Power supply | |
K2 | P0.24 | Digital I/O | General purpose I/O | |
K3 | P1.04 | Digital I/O | General purpose I/O | |
K4 | P0.22 | Digital I/O | General purpose I/O | |
K5 | P0.20 | Digital I/O | General purpose I/O | |
K6 | AVSS | Power | Ground | |
K7 | P0.18 |
Digital I/O |
General purpose I/O |
QSPI |
K8 | P0.16 |
Digital I/O |
General purpose I/O |
QSPI |
K9 | P0.14 |
Digital I/O |
General purpose I/O |
QSPI |
K10 | P0.13 |
Digital I/O |
General purpose I/O |
QSPI |
K11 | AVSS | Power | Ground | |
K12 | P1.03 |
Digital I/O |
General purpose I/O |
TWI |
L1 | P0.25 |
Digital I/O |
General purpose I/O |
|
L3 | P1.05 | Digital I/O | General purpose I/O | |
L5 | VDD | Power | Power supply | |
L7 | P0.17 |
Digital I/O |
General purpose I/O |
QSPI |
L9 | P0.15 |
Digital I/O |
General purpose I/O |
QSPI |
L11 | VDD | Power | Power supply | |
L12 | P0.08 |
Digital I/O |
General purpose I/O |
Trace, SPIM4 |