ST STEVAL-ST25R3916B Manuale utente

Introduction

The STEVAL-25R3916B is a ready-to-use kit based on the ST25R3916B high-performance NFC universal device for

contactless applications. The kit allows evaluating this device features and functionality in the reader/writer, peer to peer, and

card emulation modes.

The kit consists of:

• a microprocessor main board (STEVAL-M25R16B), which includes hardware and software tools that enable using the

entire STM32 ecosystem. This board is powered through USB connectors

• a reader expansion board (STEVAL-D25R16B), which embeds the ST25R3916B device and an antenna etched on the

PCB with its tuning circuit

The communication link between the two boards is the SPI bus. The processor card provides the power. Specific data lines

complete the pin connector assignment shared between the cards.

Thanks to several demonstrations that can be performed, this kit helps the users develop and test their applications.

The kit is FCC certified, with FCC ID: YCPR3916BD1. It is also IC certified, with IC: 8976A-R3916BD1; PMN:

STEVAL-25R3916B; HVIN: STEVAL-25R3916B.

Figure 1. STEVAL-25R3916B kit (top view)

Getting started with the STEVAL-ST25R3916B kit based on the ST25R3916B

high-performance NFC universal device and EMVCo reader

UM3033

User manual

UM3033 - Rev 1 - February 2023

For further information contact your local STMicroelectronics sales office. www.st.com

1Features

• NFC card reader IC: ST25R3916B

• 13.56 MHz inductive antenna etched on PCB and associated tuning circuit

• ISO18092 (NFCIP-1) active and passive initiator and target modes

• NFC Forum NFC-A, NFC-B, NFC-F, and NFC-V reader

• ISO14443A, ISO 14443B, and ISO15693 reader

• FeliCa™ reader

• Support for all five NFC Forum Tag types in reader mode

• Power output 42 dBμA/m @10 m (maximum power according to ETSI EN 300 V2.1.1)

• NFC Forum Type 3 tag (NFC-F) host card emulation

• NFC Forum Type 4A tag (NFC-A) host card emulation

• Transparent and stream modes to implement MIFARE™ classic compliant or other custom protocols

• Integrated inductive sensing system for low-power detection of a tag presence using phase or amplitude

measurement

• High output power

• User selectable and automatic gain control

• Serial peripheral interface (SPI) up to 10 Mb/s

• I²C with up to 400 Kbit/s in fast mode, 1 Mb/s in fast mode plus

• Automatic antenna tuning (AAT) via a variable capacitor

UM3033

Features

UM3033 - Rev 1 page 2/34

2Hardware overview

The main board PCB is usually connected to the PC via USB.

The STM32 MCU firmware controls the ST25R3916B via the extension connectors.

The 5 V supply of the USB bus powers both boards. An LDO converts this voltage down to 3.3 V to supply the

microcontroller and the ST25R3916B.

For the reader expansion board, you can select a 3.3 or 5 V RF powering. A green LED close to the motherboard

micro-USB plug indicates when the board is powered.

Figure 2. Hardware connection

2.1 Main board hardware

The STEVAL-25R3916B main board embeds a 32-bit microcontroller of the STM32L476 series, which is based on

the Arm Cortex-M4 high-performance CPU with FPU. This board is powered through the USB bus. It includes:

• an ST-LINK in-circuit debugger and programmer for STM32 microcontrollers

• push buttons (reset and user)

• a mini-USB debug connector

• a user-dedicated micro-USB connector

• support for ST NFC tag

Table 1. Powering options

Reference Connector Position Description

1 JP13 Closed 1-2 Card powered by USB

2 JP14 Closed 2-3 Card powered by micro-USB

3 JP15 Open STEVAL-25R3916B board powering (specific feature)

4 JP16 Open Card powered by an external source

UM3033

Hardware overview

UM3033 - Rev 1 page 3/34

Figure 3. STEVAL-25R3916B main board layout (top view)

1. Software bus (ST-LINK)

2. ST-LINK activity LED

3. Reset button

4. User button

5. User LED

6. Extension connectors

7. On-going tag detection indicator

8. Extension connector - GPIO setting

9. Joystick

10. Wi-Fi reset button

11. Wi-Fi software update

12. Power 3.3 V LED

13. Wi-Fi status LED

14. Powering options

15. User USB

16. ST-LINK USB

234

UM3033

Main board hardware

UM3033 - Rev 1 page 4/34

Figure 4. STEVAL-25R3916B main board layout (bottom view)

1. STM32L476 MCU

2. Test points for external connections

3. Room for Wi-Fi module

4. Regulator

5. STM32 ST-LINK

6. Room for Bluetooth® Low Energy module

2.1.1 Jumper default configuration

The STEVAL-25R3916B jumpers are configured by default to power the kit through the micro-USB connector.

Figure 5. Jumper default configuration

UM3033

Main board hardware

UM3033 - Rev 1 page 5/34

Table 2. Jumper default configuration

Connector Position Description

JP2

Closed 1-2 ST-LINK UART debug featuresJP3

JP10

JP13 Card powered by USB

JP14 Closed 2-3 Card powered by micro-USB

JP16 Closed 1-2 Board powering specific feature

2.1.2 Software development configuration

This section describes the software development configuration for the main board. It also describes the USB

connection when using the embedded ST-LINK.

The J1 micro-USB connector powers the STEVAL-25R3916B.

The J2 mini-USB allows exchanging data between the board and the computer.

Figure 6. Software development configuration

2.2 Expansion board hardware

The STEVAL-25R3916B reader expansion board embeds:

•ST25R3916B

• an antenna, with its own tuning circuit, etched on the PCB

• a switch to select 3.3 V or 5 V RF powering

The ST25R3916B is directly connected to the filtered 5 V USB supply.

There are additional supply filtering components close to the NFC/HF reader IC. All the decoupling capacitors

have been placed as close as possible to the ST25R3916B.

To connect another reader PCB via SPI, remove the serial resistors and use CN100. By default, the SPI is the

firmware and hardware access bus.

Use the I²C bus, instead, by changing J200, J201, J202, J203, J204, and J205.

J206 allows bypassing the internal VDD_RF/VDD_AM regulators to supply an output current higher than 350 mA.

UM3033

Expansion board hardware

UM3033 - Rev 1 page 6/34

Figure 7. STEVAL-25R3916B expansion board layout (top view)

1. RF front-end area

2. ST25R3916B

3. RF powering selection switch (3.3 or 5 V)

Figure 8. STEVAL-25R3916B expansion board layout (bottom view)

2.2.1 Antenna and matching network components

This board contains the matching network and the automatic antenna tuning capacitors based on varicap.

UM3033

Expansion board hardware

UM3033 - Rev 1 page 7/34

3Getting started

3.1 System requirements

• A micro-USB cable

• A USB port capable of delivering at least 400 mA at 5 V (2 W)

• A safety extra-low voltage (SELV) limited power source to supply the unit through the USB port

• A mini-USB cable to use the embedded ST-LINK and the STM32 ecosystem development

3.2 How to use the kit in standalone mode

Step 1. Connect the STEVAL-25R3916B main board to the reader expansion board.

Important: It must be used on a clean and non-flammable surface.

Step 2. The kit is delivered with the default jumper configuration. Power it through the micro-USB via a cable

connected to the power source.

Step 3. Supply the unit through a safety extra-low voltage (SELV) limited power source via the USB port.

The source must not exceed 60 VDC/8 A/100 V.

When powered up, the microcontroller starts the firmware, which is already downloaded in the flash

memory. This allows demonstrating the ST25R3916B features:

– reader and writer

– card emulation

– peer to peer

– automatic antenna tuning

– USB mode (refer to the next section for further details)

3.3 How to use the kit in USB mode

Step 1. Connect the STEVAL-25R3916B kit to a PC via a micro-USB cable.

Important: It must be used on a clean and non-flammable surface.

The PC USB port must be capable of delivering at least 250 mA at 5 V.

Step 2. To control the board, download the STSW-ST25R010 software and install it.

UM3033

Getting started

UM3033 - Rev 1 page 8/34

4Schematic diagrams

Figure 9. STEVAL-ST25R3916B main board circuit schematic (1 of 10)

TSCR_I2C_SCL

TSCR_I2C_SDA

TSCR_IRQ

SDA

CSX

LCD_BKLGHT_MOS_GATE

NRST

U_LCD

LCD.SchDoc

U_Pwr Supply

Pwr Supply.SchDoc

SPARE

GPIO_1_IRQ

I2C_SCL

I2C_SDA

SPI_MOSI

SPI_MISO

SPI_CLK

SPI_CSn

UART_RX

UART_TX

UART_RTSn

UART_CTSn

MCU_CLK

GPO_3/INT_3

GPO_2/INT_2

TDO/SWO

TMS/SWDIO

U_ST25DX Connectors

ST25DX Connectors.SchDoc

RESET#

TCK_SWCLK

UART_TX

UART_RX

STLK_MCO

STL_USB_D_P

STL_USB_D_N

USB_RENUMn

U_STLink-Jtag

STLink-Jtag.SchDoc

TMS/SWDIO

TCK_SWCLK

TDO/SWO

BLE_SPI_IRQ

BLE_SPI_CSN

BLE_SPI_MOSI

BLE_SPI_MISO

BLE_SPI_CLK

BLE_RESET

WF_UART_TX

WF_UART_RX

WF_UART_RTS

WF_UART_CTS

WF_RESET

STLK_UART_TX

STLK_UART_RX

TSCR_I2C_SCL

TSCR_I2C_SDA

TSCR_IRQ

STLK_MCO

ST25DX_SPARE

ST25DX_IRQ

ST25DX_I2C_SCL

ST25DX_I2C_SDA

ST25DX_SPI_MOSI

ST25DX_SPI_MISO

ST25DX_SPI_CLK

ST25DX_SPI_CSn

TSCR_SPI_MOSI

TSCR_SPI_CSn

TSCR_SPI_CLK

RESET#

POT_I2C_SDA

POT_I2C_SCL

POT_IN

MCU_USB_D_N

MCU_USB_ID

MCU_USB_D_P

I_MEAS_OUT

TSCR_TE

TSCR_WR

LCD_BKLGHT_MOS_GATE

GPO_4/BS1

GPO_6/D/C

GPO_5/BUSY

GPO_7/CS1

GPO_8/RESET

TSCR_SPI_MISO

ST25DX_UART_RX

ST25DX_UART_TX

ST25DX_UART_RTSn

ST25DX_UART_CTSn

ST25DX_MCU_CLK

GPO_2/INT_2

GPO_3/INT_3

U_STM32L476

SPI_IRQ

STM32L476.SchDoc

SPI_CSN

SPI_MOSI

SPI_MISO

SPI_CLK

BLE_RESET

UART_TX

UART_RX

UART_RTS

UART_CTS

WF_RESET

U_WIFI-BLE

WIFI-BLE.SchDoc

POT_I2C_SDA

POT_I2C_SCL

POT_IN

I_MEAS_OUT

U_EH

EH.SchDoc

JP6

HE14

JP7

HE14

JP8

HE14

JP9

HE14

GND

GROUND PINS

STL_USB_D_N

MCU_USB_D_N

MCU_USB_D_P

STL_USB_D_P

MCU_USB_ID

USB_RENUMn

U_USB

USB.SchDoc

GPO_4/BS1

GPO_6/D/C

GPO_5/BUSY

GPO_7/CS1

TSCR_SPI_CLK

TSCR_SPI_MISO

GPO_8/RESET

TSCR_I2C_SDA

TSCR_I2C_SCL

TSCR_SPI_MOSI

TSCR_SPI_CSn

FX1

HOLES FOR DAUGHTER BOARD

U_E-Paper_Connector

E-Paper_Connector.SchDoc

FX2

PLATED/2.7mm-6.0mm

FX3

PLATED/2.7mm-6.0mm

FX4

PLATED/2.7mm-6.0mm

GND

PLATED/2.7mm-6.0mm

Fiducial Fiducial Fiducial

MIR1

Fiducial

MIR2 MIR3 MIR4

UM3033 - Rev 1 page 9/34

UM3033

Schematic diagrams

Figure 10. STEVAL-ST25R3916B main board circuit schematic (2 of 10)

VUSB_ST_LINK

BAT60JFILM

1uF/25V C2 C3

2.2uF/16V

10nF

34L2

744232090

1L1

742792042

1L3

742792042

GND_USB

GND

VCC

LD1

GREEN

510R

GND_USB

C48

10uF/25V

3V3

PEG1

SJ5306

PEG2

SJ5306

PEG3

SJ5306

PEG4

SJ5306

R118

0R NC

R119

0R NC

R120

0R NC

R121

0R NC

PEG5

SJ5306

6Vin

2GND

1EN

ADJ

Vout

PG 3

GND(THPAD)

LD39050PUR

R45

15K

R44

47K

1 2

JP1

HE14

EXT. DC IN

VUSB_MCU

C54

10uF/25V

C56

BLM18EG471SN1D

1uF/25V

JP15

HE14

EXT. +5V IN

GND_USB

R47

C55

10uF/25V

GND

JP13

HE14

V_RF SELECT. V_RF

21L4

742792641

JP16

HE14

VCC_EHVCC V_EH

VCC_EH SELECT.

VUSB_ST_LINK

JP14

HE14

UM3033 - Rev 1 page 10/34

UM3033

Schematic diagrams

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