Features• Operating supply voltage: 3.3 - 5 V• Ambient temperature: -40/+85 °C• Sensitivity: -162 dBm indoor (tracking mode)• Interfaces:

– a UART port– an I²C port– Configurable digital I/O timepulse– EXTINT input for wakeup

• NMEA protocol• Assisted GNSS:

– Predictive autonomous– Predictive server-based– Real-time server-based

• Compatible with STM32 Nucleo boards• Compatible with the Arduino™ UNO R3 connector• LNA and SAW filter on the RF path• SMA female antenna connector• Battery holder• RoHS and WEEE compliant

DescriptionThe X-NUCLEO-GNSS1A1 expansion board is based on the Teseo-LIV3F tiny GNSSmodule.

It represents an affordable, easy-to-use, global navigation satellite system (GNSS)module, embedding a TeseoIII single die standalone positioning receiver IC, usablein different configurations in your STM32 Nucleo project.

The Teseo-LIV3F is a compact (9.7x10.1 mm) module that provides superioraccuracy thanks to the on-board 26 MHz temperature compensated crystal oscillator(TCXO) and a reduced time-to-first fix (TTFF) with its dedicated 32 KHz real-timeclock (RTC) oscillator.

The Teseo-LIV3F module runs the GNSS firmware (X-CUBE-GNSS1) to perform allGNSS operations including acquisition, tracking, navigation and data output withoutexternal memory support.

The X-NUCLEO-GNSS1A1 expansion board is compatible with the Arduino™ UNOR3 connector and the ST morpho connector, so it can be plugged to the STM32Nucleo development board and stacked with additional STM32 Nucleo expansionboards.

Product summary

GNSS expansionboard based onTeseo-LIV3Fmodule forSTM32 Nucleo

X-NUCLEO-GNSS1A1

Tiny GNSSmodule Teseo-LIV3F

Global navigationsatellite systemsoftwareexpansion forSTM32Cube

X-CUBE-GNSS1

GNSS expansion board based on Teseo-LIV3F module for STM32 Nucleo

X-NUCLEO-GNSS1A1

Data brief

DB3458 - Rev 2 - October 2018For further information contact your local STMicroelectronics sales office.

www.st.com

1 Schematic diagram

Figure 1. X-NUCLEO-GNSS1A1 circuit schematic (1 of 3)

Closed

VCC_RFHEADER1x2

GND

AntOFF13

A3

1

GND

GND

R2

2K1

Closed

+VCC_IO

11

R1

Vant

U8

SN74LV1T126

R9

1k5NM

IOREF

D2

GND

Red

_LED

GND3

RF_IN

C2010nFNM

R8330R

AntOFF

B 4

IOREF

SDA216

JR14SHUNT 2.54 mm.

J15

VCC_RF14

GND

GND2

HEADER1x2

+VCC_IO

+VCC_IO

J14

UART_TX

GND

R10330R

U6TXB0101DCK

R320R

C161µF

Vant

A2

D3

OE 5

RESETn

GND

GND

GND

VccA1

GND

A24

GND

GND2

I2C_CLOCK

R2

C13100nF

SYS_WAKEUP

GND

U1Teseo-LIV3F (SPGNSS-LIV3F)

R3310K

I2C_DATA

R1

200k NM

C14100pF

1PPS 4

C241µF

R11

0R

Vcc 5

VccB 7 Reserved115

I2C_CLOCK

GND

GND

U5TXB0101DCK

PPS

WAKEUP

TX

R30200k

IOREF PPSA15

GND2

GND

U7TXB0101DCK

2

GND 1

Vbatt 6

+VCC_IO

2 2

C234.7µF

B1 8

A3

RESETn Battery

VccA3

SMD0402SMD0402

SMD0402

SMD0402

SMD0402

SMD0402

SMD0402

SMD0402SMD0402

SMD0603

SMD0603

SMD0603SMD0603

SMD0603

SMD0402

SMD0402

SMD0603

SMD0603SMD0603

SMD0603

SMD0603

SMD0603

SMD0603 size SC70

VSSOP

SMD0402

SMD0402

SMD0603

SMD0402

SYS_RESETn

RESETn

I2C_SDA

GND

I2C_SCL

WAKEUP

VccA1

R31

200k NM

3

IOREF

GND

PPS

C191µF

Wake-Up 5

SCL217

GND

C211µF

RX

U4

TXS0102

VccB 6

GND_RF10

R34

2K1

UART_TX

B 4

I2C_DATA

+VCC_IO

+VBatt

JR15SHUNT 2.54 mm.

OE 1

+VCC_IO

SYS_WAKEUP

OE 6

Q1MUN2214T1G

AntOFF

UART_RX

VCC 8

VccB 6

C181µF

D1

BAT20J

C221µF

2 2

RX 3

Reserved218

OE 5

C124.7µF

C111µF

GND

+VBatt

RESETn 9

RF_IN11

A3

GND

C101µF

UART_RXB2 1

VccB 6

GND

VL1

BATTERY HOLDER (CR2032)

GNSS Module

RX

+VCC_IO

RESETn

GND

VCC_IO 7

SYS_RESETn

I2C_SCL

GND

TX 2

11

RF_IN

IOREF

B 4

Gre

en_L

ED

GND_RF12

RESETn

GND

Y 4

+VCC_IO

OE 5

I2C_SDA

TX

GND

VCC_RF

TP1

C1710nF

GND2

VccA1

C151µF

X-NUCLEO-GNSS1A1Schematic diagram

DB3458 - Rev 2 page 2/5

Figure 2. X-NUCLEO-GNSS1A1 circuit schematic (2 of 3)

HEADER1x2

CN5 of NUCLEO BOARDAGND

J3

GND 20

NC/PF6

{D2 = PA10: STM32 USART1_RX}

{D8 = PA9: STM32 USART1_TX}

{Default}

HEADER1x2

2 2

Arduino

PB8D15/SCL

CN10

NM

11

PB1CN9

VIN

TX

VDD

J2

PA0A0

PPS

7

11

20

PPS

PA12

31

11

HEADER1x2

D1/RXPA2

19

PC10

J12

11

CN5

D0/TXPA3

SYS_WAKEUP

21

CN7 o

f NUC

LEO

BOAR

D

CN8 o

f NUC

LEO

BOAR

DCN6

of N

UCLE

O BO

ARD

CN10

of N

UCLE

O BO

ARD

PA13 PA11

Arduino

SYS_RESETn

PC14

2 2

PA1A1

10

D3/PWMPB3

PC3

16

JR9SHUNT 2.54 mm.

GND

D13/SCK

30

E5V

2 2

Closed

Open

26

GND

D9/PWM

HEADER1x2

19

NC/PF4

D6/PWM

38

27

16PB11/NC

HEADER1x2

37

28

3

9

IOREF

910

26

1

J10

17

D7

38

123456

3130

D6/PWMPB10

D11/MOSI/PWMPA7

28

PA4A2

PD2

11

29

JR11SHUNT 2.54 mm.

J4

PA15

VLCD/VBAT

29

Pass-Through:Male on Bottom - Female on Top

Pass-Through:Male on Bottom - Female on Top

Pass-Through:Male on Bottom - Female on Top

Pass-Through:Male on Bottom - Female on Top

GND

987654321

PH1/PF1/PD1

PC13

2

CN8

24

78

D8

3735

8

RX

PH0/PF0/PD0

I2C_DATA

PC2

2 2

IOREF

PC9

Closed

HEADER1x2

2 2

23

11

Closed

PD8

PA14

27

D9/PWMPC7

HEADER1x2

23

D15/SCL

PC8

D7PA8

D10/CS/PWMPB6

connectors

4

Pass-Through:Female on Bottom - Male on Top

Pass-Through:Female on Bottom - Male on Top

ST m

orph

o

CN7

12

NM

D4

10

J11

HEADER1x2

ST m

orph

o

Closed

BOOT0

IOREF

18

GND

24

2 2

J9

11

17

AVDD

11

25

PC0A536

D5/PWMPB4

12345678

34

5

PC1A4

PC6PB9D14/SDA

PC15

D14/SDA

PB13

RESET

PC5

HEADER1x2

36

J6

15

+VCC_IO

11

D8PA9

+3V3+5V

11

PB0A3

I2C_CLOCK

PB2

HEADER1x2

Open

Open

HEADER1x2

2 2

21

D1/RX

JR13SHUNT 2.54 mm.

Open

1

35

2 2

Closed

6

11

PB15

32

22

14

PB14

33

PB12

NC/PF7

Open

87654321

SYS_WAKEUP

2 2

Closed

2 2

+3V35

J13

2 2

D13/SCKPA5

GND

34

4

11

NUCLEO

J5

D12/MISOPA6

RX

14

11

22

2

J8

15

CN9 of NUCLEO BOARD

HEADER1x2

PB7

13

NC/PF5

Open

CN6

PC12

Ardu

ino

12

PC4

JR12SHUNT 2.54 mm.

25

TXD0/TX

D2PA10

Ardu

ino

IOREF

11

3332

6

JR4SHUNT 2.54 mm.

J7

+3V3

{Default}

{Default}

{Default}

{Default}

{Default}

3

D2

D2

2 2

13

D4PB5

18

U5V

JR2SHUNT 2.54 mm.

PC11

Figure 3. X-NUCLEO-GNSS1A1 circuit schematic (3 of 3)

AI5

GND

C11nF

4

R170RNM

OC3

L256nH

GND

AntOFF

C71µF

U2BGA824N6

PON

GND

Vant

VCC

GN

D-R

F

VCC_RF

L1

6.8nH

R21

100k

RF_IN

GND

D4ESDARF02-1BU2CK

GND

U3

TPS22943

SMD0402

SMD0402

SMD0402

SMD0402

SMD0402

SMD0402

SMD0402

SMD0603

SMD0402

SMD0402SMD0402

SMD0402

SMD0402

SMD0402

SMD0402

SMD0402

SMD0402

SMD0402

SMD0805SMD0805

SMD0402

C2

120pF

RF In Section

R250R

NM

R293RNM

R150R

A0 3Ant_In 4

6

2

GND

R2410K

SMD0402

2

R180RNM

Vin 5

GN

D

C53.9pFNM

R230R

R280R NM

ON 4

R260R

1

VCC_RF

GND2

C3

120pF

GND

GND

GND

R220RNM

C9

56pF

1

5

Vout1

3

R20

0R

GND

CN1

SMA

C82.2µF

Z1

B4327

Current_L R270R

X-NUCLEO-GNSS1A1Schematic diagram

DB3458 - Rev 2 page 3/5

Revision history

Table 1. Document revision history

Date Version Changes

05-Dec-2017 1 Initial release.

12-Oct-2018 2 Updated cover page image and Section 1 Schematic diagram.

X-NUCLEO-GNSS1A1

DB3458 - Rev 2 page 4/5

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X-NUCLEO-GNSS1A1

DB3458 - Rev 2 page 5/5