ST X-NUCLEO-SNK1M1 Manual de usuario

Introduction

The X-NUCLEO-SNK1M1 expansion board allows evaluating the features of TCPP01-M12 and the USB Type-C overvoltage

protection for VBUS and CC lines suitable for Sink applications.

The expansion board is designed to be stacked on top of any STM32 Nucleo-64 development board exploiting the

characteristics of the USB Type-C and Power Delivery (UCPD) peripheral embedded in their microcontrollers.

It can also be stacked on other STM32 Nucleo development boards not supporting the UCPD peripheral to demonstrate the

Type-C basic operations (attach, detach and power supply current capability recognition).

The X-NUCLEO-SNK1M1 provides an effective demonstration of the dead battery operation, thanks to the integrated

ST715PU33R LDO linear regulator that supplies the connected STM32 Nucleo development board when a Source is attached

via a USB Type-C connector.

The X-NUCLEO-SNK1M1 is compliant with the latest USB Type-C and Power Delivery specifications and is also USB-IF

certified as a 100 W solution supporting Programmable Power Supply (PPS) function.

The companion software package (X-CUBE-TCPP) contains the application examples for development boards embedding

UCPD-based microcontrollers (NUCLEO-G071RB and NUCLEO-G474RE) and for non-UCPD ones (NUCLEO-L412RB-P).

Figure 1. X-NUCLEO-SNK1M1 expansion board

Note: Before running any demo, set CC1 J1, CC2 J2, JP3 and JP4 jumpers according to the configuration described in

Section 1.3 Demo application setup.

Getting started with the X-NUCLEO-SNK1M1 USB Type-C™ Power Delivery Sink

expansion board based on TCPP01-M12 for STM32 Nucleo

UM2773

User manual

UM2773 - Rev 1 - March 2021

For further information contact your local STMicroelectronics sales office.

www.st.com

1Getting started

1.1 Overview

The X-NUCLEO-SNK1M1 expansion board features:

• On-board TCPP01-M12 protection for USB Type-C and PD Sink applications

• Compliant with the latest USB Type-C and Power delivery specification, including the Programmable Power

Supply (PPS) feature

• USB-IF certified (Test ID certification: 5205)

• 100 W-rated solution

• 6 V overvoltage protection (OVP) on CC lines against short-to-VBUS when the connector is unplugged

• Up to 22 V adjustable overvoltage protection (OVP) on VBUS line against charger failure

• Surge protection (8/20 µs) and system-level ESD protection on VBUS

• Common mode filter and ESD protection on USB 2.0 High Speed data lines

• System level ESD protection on CC lines as per IEC61000-4-2 level 4 (±8 kV contact discharge)

• Low power mode for battery operation allowing zero current consumption when no cable is attached

• Integrated dead battery management when the device battery is fully depleted

• Overtemperature protection (OTP)

• RoHS compliant

1.2 Hardware architecture

The X-NUCLEO-SNK1M1 expansion board is designed to be used with any STM32 Nucleo-64 development

board embedding the UCPD peripheral (mainly NUCLEO-G071RB and NUCLEO-G474RE) and also with the

ones not supporting the UCPD peripheral.

Note: The compliance with the USB Type-C and Power Delivery specification is guaranteed only for the STM32

Nucleo development boards embedding the microcontrollers (STM32G071RB and STM32G474RE) with a

UCPD peripheral.

When stacked with a non-UCPD STM32 Nucleo development board, the X-NUCLEO-SNK1M1 can still

demonstrate some Type-C basic operations like ATTACH/DETACH recognition and identification of source current

capability.

Moreover, two couples of resistances, used as solder bridge selectors, allow exploiting the USB2.0 peripheral.

The expansion board must be plugged on the matching pins of the development board CN7 and CN10 ST

morpho connectors.

When plugged onto an STM32 Nucleo development board, the expansion board can be supplied in two different

ways:

• by the STM32 Nucleo ST-LINK supply using the development board internal LDO

• by the VBUS provided when a Source is plugged into the CN1 USB Type-C connector and thanks to the

integrated ST715PU33R LDO linear regulator (U2) that supplies the entire system, which supports Dead

Battery operation mode.

UM2773

Getting started

UM2773 - Rev 1 page 2/23

Figure 2. X-NUCLEO-SNK1M1 main functional blocks (top view)

1. Morpho connector (CN7)

2. Arduino connector (CN6, CN8)

3. Reset jumper (JP4)

4. LDO OUT jumper (JP5)

5. 3V3 LED (LD2)

6. VBUS LED (LD1)

7. Power connector (CN2)

8. TCPP01-M12 USB-C overvoltage protection for VBUS and CC lines (U1)

9. BAT54K Schottky diode (D2)

10. CC1 line configuration jumper (J1)

11. CC2 line configuration jumper (J2)

12. USB data setting resistor (R12)

13. ECMF02-2AMX6 common-mode filter and ESD protection for USB 2.0 and MIPI/MDDI interfaces (U3)

14. Type-C connector (CN1)

15. STL11N3LLH6 N-channel 30 V, 6 mOhm typ., 11 A STripFET H6 Power MOSFET (Q1)

16. Arduino connector (CN5, CN9)

17. Morpho connector (CN10)

18. USB data setting resistor (R8, R9)

19. USB data setting resistor (R13)

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Hardware architecture

UM2773 - Rev 1 page 3/23

Figure 3. X-NUCLEO-SNK1M1 main functional blocks (bottom view)

1. Morpho connector (CN10)

2. ESDA25P35-1U1M TVS diode (D1)

3. OVP threshold solder bridges (SH1, SH2, SH3, SH4, SH5)

4. ST715PU33R high input voltage LDO linear regulator (U2)

5. Morpho connector (CN7)

1.2.1 Type-C connector

The USB Type-C receptacle (CN1) gathers the VBUS path and the main connections, such as CC lines and

USB2.0 data lines (DP, DM), before dispatching data to the major functional blocks.

Figure 4. Type-C receptacle (CN1) and ESDA25P35-1U1M TVS diode (D1)

VBUSc

GND

CN1

GND4

B12

WE-632723300011

RX1+

B11

RX1-

B10

VBUS4

SBU2

D-2

D+2

CC2

GND1 A1

VBUS3

TX2-

TX2+

GND3

TX1+ A2

TX1- A3

VBUS1 A4

CC1 A5

D+1 A6

A10

A11

A12

D-1

SBU1

VBUS2

RX2-

RX2+

GND2

330p

ESDA25P35-1U1M

330p

GND_C GND_C

VBUSc

CC1c

DM DP

DP DM

CC2c

VBUSc

GND_C GND_C

An ESDA25P35-1U1M TVS diode has been integrated to protect the VBUS power line and, consequently, the

entire system against EOS and ESD transients when a Source is connected through the USB-C cable.

UM2773

Hardware architecture

UM2773 - Rev 1 page 4/23

1.2.2 TCPP01-M12 USB-C protection and VBUS overvoltage protection setup

TCPP01-M12 (U1) protects CC1 and CC2 pins of the USB-C and PD controller Sink against overvoltage in case a

short-circuit event with the VBUS occurs during the ATTACH or DETACH operation with a defective tool.

The protection is implemented by removing the USB Type-C cable from its receptacle.

Figure 5. TCPP01-M12 protection (U1) driving the STL11N3LLH6 MOS (Q1)

Connector

side

DB/

CC1

CC2

CC1c

CC2c

VCC

FLT

VBUS

VCC

GND

SH1 0 N.M.

10k

SH5

0 N.M.

TCPP01_M12

VBUS_CTRL

3CC1 7

CC1c

1CC2 9

CC2c

DB/

10 FLT/ 11

GND

GND1

SOURCE

GATE

IN_GD

VCC

R1_22V 620

SH3 0 N.M.

STL11N3LLH6

10k

CC1

CC2

CC1c

CC2c

VBUS

DB/

VBUSc

VBUS_CTRL

Controller

side

100W

VBUS max P max

6V 15W

10V 27W

13V 36W

17V 45W

22V

0 N.M.

R1_6V 2.7k

R1_10V 1.5k

R1_13V 1.1k

R1_17V 820

BAT54K

100n

TCPP01-M12 overvoltage protection (OVP) threshold setup mechanism is based on a resistive network

composed of five resistors (R1_6V, R1_10V, R1_13V, R1_17V and R1_22V) and five solder bridges (SH1, SH2,

SH3, SH4 and the SH5). Connected to the device through the BAT54K signal Schottky diode (D2), this section is

shown in the figure above (left side) and is placed at the board bottom.

On the X-NUCLEO-SNK1M1 expansion board, the 22 V OVP threshold is set by default via SH5. To change the

threshold to another value (6, 10, 13 or 17 V), remove SH5 and add a different solder bridge on the selected OVP

voltage.

When a defective power source plugged onto the Type-C connector produces a voltage higher than the selected

OVP threshold, the TCPP01-M12 OVP mechanism controls the external MOSFET Q1 and interrupts the VBUS

line.

1.2.3 CC lines and configuration jumpers

Two headers for jumpers (J1 and J2) have been integrated to change the CC lines paths from the TCPP01-M12

protection to the ST morpho connectors (CN7 and CN10) on the STM32 Nucleo development board, setting them

differently according to the peripheral mapping of the STM32 microcontroller.

This integration guarantees the solution flexibility support for the demo across the STM32 Nucleo-64 development

board range.

UM2773

Hardware architecture

UM2773 - Rev 1 page 5/23

Figure 6. CC line configuration jumpers

CC1

CC2

GND

R21

5.1k

R16 100

0R18

R15

0R19

R17

5.1k

0R22

R20 100

JUMPER

CC1_G4

CC1_G0

CC2_G4

CC1_no_UCPD

CC2_no_UCPD

CC2_G0

R14

Jumper-Female

The table below shows the jumper settings to configure the X-NUCLEO-SNK1M1 to work with the STM32 Nucleo

development boards embedding the UCPD peripherals (NUCLEO-G071RB and NUCLEO-G474RE) as well as

with other STM32 Nucleo-64 boards (NUCLEO-L412RB-P) implementing the Type-C attach-detach recognition

mechanism.

Table 1. J1 and J2 CC lines configuration setting jumpers

Compatible STM32 Nucleo

boards

Jumpers

CC1 - J1 CC2 -J2

Any STM32 Nucleo-64

development board with UCPD

(NUCLEO-G071RB and NUCLEO-

G474RE)

Any STM32 Nucleo-64

development board without UCPD

(NUCLEO-L412RB-P)

When both configuration jumpers (J1 and J2) are set to positions 1-2, the board is compatible with NUCLEO-

G071RB and NUCLEO-G474RE offering the UCPD peripheral.

This association permits to fully demonstrate the main characteristics of the USB Type-C and Power Delivery

standards implemented by the demo application example.

When J1 and J2 are both set to positions 2-3, the X-NUCLEO-SNK1M1 can match any STM32 Nucleo-64

development board, demonstrating the basic mechanism of the Type-C specification, thanks to two pull-down

resistors (R17 and R21) connected to the pins working as CC lines, allowing the Sink Type-C operations to run

with any attached Source.

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Hardware architecture

UM2773 - Rev 1 page 6/23

1.2.4 USB 2.0 data path and configuration setting

The X-NUCLEO-SNK1M1 expansion board allows STM32 Nucleo development boards that feature a USB2.0

peripheral to expose the D+/D- lines on the Type-C receptacle (CN1).

Most STM32 Nucleo-64 development boards feature this functionality on the ST morpho connector CN10-12 and

CN10-14 pins, whereas NUCLEO-L412RB-P, NUCLEO-L433RC-P, NUCLEO-L452RE-P and NUCLEO-L476RG

boards map USB2.0 data pins on CN10-33 and CN10-17 pins.

Two couples of resistances has been implemented and connected to the ECMF02-2AMX6 (U3) USB2.0 data lines

protection to extend the use of this peripheral to all the STM32 Nucleo-64 development boards.

Figure 7. USB2.0 data lines protection ECMF02-2AMX6 (U3) and resistor setup

ZDiff 90 Ohm

DP_Gx_Fx

DM_Gx_Fx

DP_Lx

DM_Lx

GND

N.M.

1DP1

ECMF02_2AMX6

2DM2

3GND 4

DM5

DP6

0R12

N.M.

R8 0

R9 0

R13 0

ZDiff 90 Ohm

By default, the X-NUCLEO-SNK1M1 board mounts R8 and R9 resistors fitted to guarantee USB2.0 compatibility

to all the main microcontroller families, but, for the L4 family (NUCLEO-L412RB-P, NUCLEO-L433RC-P,

NUCLEO-L452RE-P and NUCLEO-L476RG) only, they have to be removed and replaced by R12 and R13 solder

bridges.

1.2.5 ST morpho and Arduino UNO V3 connectors

The figure below shows the X-NUCLEO-SNK1M1 expansion board ST morpho and Arduino UNO V3 connectors,

detailing the main connections, functions and configuration settings.

Figure 8. ST morpho and Arduino UNO V3 connectors

VCC FLT

VBUS

DP_Gx_Fx

DM_Gx_Fx

DP_Lx

DM_Lx

3.3V

GND

3.3V

1 2

5 6

7 8

9 10

11 12

15 16

19 20

21 22

23 24

27 28

31 32

33 34

37 38

40.2k

CN6

61300811821

CN9

R23 0

N.M.

200k 0R24

CN5

CN8

CN7

1 2

5 6

7 8

9 10

11 12

13 14

15 16

17 18

23 24

25 26

27 28

31 32

33 34

35 36

D15

VDD E5V

D14

BOOT0 GND

AVDD U5V

NC/

GND

IOREF

D13

D12

RESET NRST

+3V3

D11

+5V

CC1_G4

D10

FLT_IN

GND GND

D9 GND

DB_OUT

CC2_G0

A2 AGND

D15

NC/ D14

IOREF AVDD

RESET GND

+3V3 D13

+5V D12

GND D11

GND D10

VIN

ADC_VBUS

VCC_OUT

FLT_IN

VCC_OUT

GND

VIN

CC1_no_UCPD

CC2_no_UCPD

ADC_VBUS

R27

ESQ-119-24-T-D

61300811821

ESQ-119-24-T-D

17 18

CN10

R22 0

UM2773

Hardware architecture

UM2773 - Rev 1 page 7/23

In addition to the main functions related to the USB Type-C and Power Delivery specification:

• an ADC channel can be used to monitor the VBUS voltage (ADC_VBUS)

• a supply option path allows supplying the TCPP01-M12 either via the 3.3 V provided by the STM32 Nucleo

development board or via a GPIO on the ST morpho connector (CN7-1). You can select the path through

R23 and R24 resistances. This option, combined with the TCPP01-M12 low consumption, is useful for

battery-powered devices as the TCPP01-M12 can be powered only when an attachment is detected (low-

power mode)

• the TCPP01-M12 fault report pin (open drain) is connected to the ST morpho connector pin (CN10 – 18) to

be monitored by the STM32 microcontroller (FLT – FLT_IN path)

1.2.6 Indication LEDs

Two LEDs mounted on the X-NUCLEO-SNK1M1 top side indicate the supply status of the expansion board and

the stacked STM32 Nucleo development board:

• the red LED (LD1) turns ON when a source application board is plugged to the X-NUCLEO-SNK1M1 CN1

connector and the USB Type-C VBUS voltage is present;

• the green LED (LD2) indicates that the 3.3 V is present and is supplying the STM32 Nucleo microcontroller

development board.

Figure 9. Indication LEDs

3.3V

GND GND

LD1

150060RS75000

3.9k

LD2

VBUS

Red LED

Green LED

3.3V

VBus

150060GS75000

1.2.7 Dead battery mode configuration jumpers and internal LDO

Thanks to the dead battery feature, described by the USB Power Delivery specification and implemented by the

X-NUCLEO-SNK1M1, it is possible to directly power the system through the VBUS provided by a Source, as an

alternative mode to the standard supply through the STM32 Nucleo ST-LINK.

Note: Before configuring the X-NUCLEO-SNK1M1 to operate in dead battery mode, check whether the supply

selection jumpers on the STM32 Nucleo board have been removed:

• on the NUCLEO-G071RB, remove the jumper from JP2 header

• on the NUCLEO-G474RE, remove the jumper from JP5 header 5V_SEL

• on the NUCLEO-L412RB-P, remove the jumper from JP5 header

UM2773

Hardware architecture

UM2773 - Rev 1 page 8/23

Figure 10. Dead battery mode circuitry

DB/

3.3V

GND

3.3V

CN10

ST715PU33R

GND

Vin 3

EXP

N.M.

220n

VBUS

LDO_OUT

NRST

DB_OUT

Jumper-Female

J3 JUMPER-con2 strip-male

JUMPER-con2 strip-male

Jumper-Female

R25 0

R22 0

To select the dead battery operation mode on the X-NUCLEO-SNK1M1, JP3 and JP4 jumpers must be fit.

Table 2. J3 and J4 power mode selection jumpers

Power mode

Jumpers

J3 (LDO_OUT) J4 (RESET)

ST-LINK powered mode

(open) (open)

Dead battery mode

(fit) (fit)

JP3 jumper connects the VBUS path from the Type-C connector to the LDO (U2) which is connected to the STM32

Nucleo development board 3.3 V path and can power the entire solution.

When fitted, JP5 jumper forces the STM32 I/O negative reset to level 1. It must be connected when the STM32 is

By default, the TCPP01-M12 dead battery option has been set to be driven by an STM32 microcontroller pin

through R26 solder bridge, thus removing the TCPP01-M12 dead battery clamp when GPIO is connected on ST

morpho connector (CN10-24). The alternative operating mode is to fit the TCPP01-M12 dead battery option to

3V3 through the R25 mounting solder bridge (consequently, R26 must be not fitted).

In the application firmware package, this option has been included in the firmware examples where a GPIO (ST

morpho CN10-24) properly drives the dead battery option.

1.2.8 Power connector

CN2 power connector can be used to connect a load and monitor the VBUS voltage level negotiated by the system

with a Source attached to CN1 Type-C connector.

UM2773

Hardware architecture

UM2773 - Rev 1 page 9/23

Figure 11. CN2 power connector

CN2

VBUS

GND

691210910002

Note: To monitor the output voltage, an appropriate resistance has to be connected to the X-NUCLEO-SNK1M1 CN2.

1.3 Demo application setup

The X-NUCLEO-SNK1M1 expansion board flexibility permits to demonstrate the TCPP01-M12 protection features

and capabilities with a wide range of STM32 Nucleo development boards.

The X-CUBE-TCPP companion software package contains specific application examples for the STM32 Nucleo

embedding the USB Type-C and Power Delivery management (NUCLEO-G071RB and NUCLEO-G474RE) and,

for the ones without the UCPD peripheral, the package demonstrates how to comply with basic Type-C operations

(NUCLEO-L412RB-P).

1.3.1 Programming and debugging

Once the X-NUCLEO-SNK1M1 expansion board has been connected to a NUCLEO-G071RB, NUCLEO-G474RE

or NUCLEO-L412RB-P, to program and debug, the STM32 Nucleo development board has to be connected to a

laptop by the embedded USB ST-LINK connector (CN2) to supply the solution and program the firmware example

in the application microcontroller.

Note: Set the jumpers as follows:

• On the STM32 Nucleo development board, ensure the 5 V selection jumper fits with the 5 V ST-LINK

header (JP5 on NUCLEO-G474RE and NUCLEO-L412RB-P, JP2 on NUCLEO-G071RB)

• On the X-NUCLEO-SNK1M1 expansion board:

– remove LDO OUT jumper (JP3)

– remove NRST jumper (JP4)

Note: The X-CUBE-TCPP MCU firmware applications are designed to select the highest and closest power profile

exposed by the Source, after the explicit contract negotiation.

1.3.1.1 Running the demo application with NUCLEO-G071RB development board

The NUCLEO-G071RB development board embeds the STM32G071RB microcontroller with the UCPD

peripheral. To run the application demo with the NUCLEO-G071RB, powering the system via ST-LINK micro-USB

connector, follow the procedure below.

Step 1. Check the jumper is closed on the development board JP2 header, STLK 1-2 pins.

Step 2. On the X-NUCLEO-SNK1M1 expansion board, fit CC1 JP1 and CC2 JP2 jumpers on position 1-2.

Step 3. Plug the expansion board on top of the STM32 Nucleo and leave J3 and J4 headers open.

Step 4. Connect the NUCLEO-G071RB micro-USB connector (CN1) to the PC/laptop.

The board appears as a virtual disk (NODE_G071RB).

Step 5. Program the STM32G071RB by dragging and dropping the binary file corresponding to the board

(G0_SNK1M1_Consumer.bin) to the virtual disk.

STM32 Nucleo LD1 LED blinks red and green for few seconds. When the LED stops blinking, the

programming operation is complete and the demo is ready.

UM2773

Demo application setup

UM2773 - Rev 1 page 10/23

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