STMicroelectronics NUCLEO-8S208RB User Manual

UM2364

User manual

STM8S208RBT6 Nucleo-64 board

Introduction

The STM8S208RBT6 Nucleo-64 board (NUCLEO-8S208RB) provides an affordable and flexible way for users to try out new concepts and build prototypes with STM8S Series microcontrollers in the LQFP64 package, which provide various combinations of performance, power consumption and features. The Arduino ™ Uno V3 connectivity support and the ST morpho headers allow easy expansion of the functionality of the Nucleo open development platform with a wide choice of specialized shields. The STM8S208RBT6

Nucleo-64 board does not require any separate probe, as it integrates the ST-LINK/V2-1 debugger and programmer.

Figure 1. STM8S208RBT6 Nucleo-64 board

May 2018

Picture is not contractual.

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Contents

Contents

6

UM2364

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.1

Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.2

System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.3

Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.4

Hardware configuration variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6.1

Cuttable PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6.2

Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6.2.1

6.2.2

Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.3

Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.3.1

6.3.2

6.3.3

6.3.4

Power supply input from the USB connector . . . . . . . . . . . . . . . . . . . . . 15

External power supply inputs: VIN and E5V . . . . . . . . . . . . . . . . . . . . . 16

External power supply input: 3V3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

External power supply output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.4

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.5

Push-buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.6

JP1 (T_NRST) and JP3 (IDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.7

OSC clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.8

USART communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.9

Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.10

Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.11

Arduino™ connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.12

ST morpho connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

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8

Product history and limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.1

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.2

Board revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.3

Known limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

CE Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

8.1

Electromagnetic compatibility and immunity . . . . . . . . . . . . . . . . . . . . . . 27

9 FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

9.1

Part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

9.2

Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

9.3

Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Appendix A Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

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3

List of tables

List of tables

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Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Table 7.

Table 8.

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Codification explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

SB9 configuration table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

External power sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Power-related jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3V3 external power source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

USART connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 9.

STM8S configuration of pins PE3 and PE4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 10.

Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 11.

Arduino™ connectors on NUCLEO-8S208RB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 12.

ST morpho connector on NUCLEO-8S208RB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 13.

Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

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List of figures

List of figures

Figure 1.

STM8S208RBT6 Nucleo-64 board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2.

Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 3.

STM8S Nucleo board top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 4.

STM8S Nucleo board bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 5.

STM8S Nucleo board mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 6.

Typical configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 7.

Updating the list of drivers in Device Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 8.

NUCLEO-8S208RB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 9.

STM8S Nucleo board top schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 10.

STM8S I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 11.

STM8S power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 12.

Arduino™ extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 13.

Nucleo power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 14.

ST-LINK/V2 SWIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

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5

Features

1 Features

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The STM8S208RBT6 Nucleo-64 board offers the following features:

• STM8S208RBT6 microcontroller in LQFP64 package

• Flash memory size: 128 Kbytes

• Four LEDs:

– USB communication (LD4), 5 V ST-LINK (LD3), user LED (LD2), power LED (LD1)

• Two push-buttons: USER and RESET

• Two types of extension resources

– Arduino ™ Uno V3 connectivity

– ST morpho extension pin headers for full access to all STM8S I/Os

• Flexible board power supply:

– USB VBUS or external source (3.3 V, 5 V, 7 - 12 V)

– Power management access point

• On-board ST-LINK/V2-1 debugger and programmer with SWIM connector

• USB re-enumeration capability. Three different interfaces supported on USB:

– Virtual COM port

– Mass storage

– Debug port

• Comprehensive free software STM8 standard library including a variety of software examples

Evaluation tools marked as "ES" or "E" are not yet qualified and therefore they are not ready to be used as reference design or in production. Any consequences deriving from such usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering sample tools as reference design or in production.

"E" or "ES" marking examples of location:

• On the targeted STM8S that is soldered on the board (for illustration of STM8S marking, refer to the section “Package information” of the STM8S208xx datasheet available at www.st.com

).

• Next to the evaluation tool ordering part number, that is stuck or silk-screen printed on the board.

This board features a specific STM8S Series device version which allows the operation of any library. This STM8S Series device shows a “U” marking option at the end of the standard part number and is not available for sales.

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UM2364 Ordering information

Table 1 lists the order codes and the respective targeted STM8S.

Order code

NUCLEO-8S208RB

Table 1. Ordering information

Targeted STM8S

STM8S208RBT6

The meaning of the NUCLEO-TXXXRY codification is explained in Table 2 with an example:

TXXXX

R

NUCLEO-TXXXRY

Y

Table 2. Codification explanation

Description Example: NUCLEO-8S208RB

STM8 product line

STM8 package pin count

STM8 Flash memory size

(3 for 256 bytes, 4 or 6 for

32 Kbytes, 8 for 64 Kbytes,

B for 128 Kbytes)

8S208

64 pins

128 Kbytes

The order code is printed on a sticker placed at the top or bottom side of the board.

4 Conventions

Table 3 provides the conventions used for the ON and OFF settings in the present

document.

Table 3. ON/OFF conventions

Convention Definition

Jumper JP1 ON

Jumper JP1 OFF

Solder bridge SBx ON

Solder bridge SBx OFF

Jumper fitted

Jumper not fitted

SBx connections closed by solder or 0 ohm resistor

SBx connections left open

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Quick start UM2364

The STM8S208RBT6 Nucleo-64 board (NUCLEO-8S208RB) is a low-cost and easy-to-use development platform used to quickly evaluate and start a development with an STM8S

Series microcontroller in LQFP64 package.

Before installing and using the product, accept the Evaluation Product License Agreement from the www.st.com/epla webpage.

Follow the sequence below to configure the STM8S Nucleo board and launch the demo software:

1.

Check the jumper position on the board: JP3 (IDD) on position (1-2) or (2-3), and JP2 on position (1-2)

2. Connect the STM8S Nucleo board to a PC with a USB cable ‘Type-A to Micro-B’ through USB connector CN6 to power the board. As a result, LEDs LD4 (COM) and

LD1 (PWR) light up, and the green LED LD2 blinks.

3. The demo software and several software examples that allow to use the STM8S

Nucleo board features are available at the www.st.com/stm8nucleo webpage.

4. Develop an application using the available examples.

• Windows ® OS (7, 8 and 10)

• USB Type-A to Micro-B cable

• STMicroelectronics: free STVD-STM8 (using Cosmic toolchain)

• IAR

™

: IAR-EWSTM8

• Cosmic: free IDEA

The board can be delivered with different configurations of the oscillator of the STM8S. For all the details concerning the high-speed configurations of the oscillator, refer to

Section 6.7:

OSC clock supply on page 19

.

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6

Hardware layout and configuration

Hardware layout and configuration

The STM8S Nucleo board is designed around the STM8S Series microcontrollers in a 64pin LQFP package.

Figure 2 shows the connections between the STM8S and its peripherals (ST-LINK/V2-1,

push-button, LED, Arduino™ connectors and ST morpho connector).

Figure 3

and Figure 4

show the location of these features on the STM8S Nucleo board.

Figure 5 shows the mechanical dimension of the STM8S Nucleo board.

Figure 2. Hardware block diagram

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36

Hardware layout and configuration

Figure 3. STM8S Nucleo board top layout

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UM2364 Hardware layout and configuration

Figure 4. STM8S Nucleo board bottom layout

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36

Hardware layout and configuration

Figure 5. STM8S Nucleo board mechanical dimensions

UM2364

All dimensions in millimeters.

The STM8S Nucleo board is divided into two parts: ST-LINK part and target STM8S part.

The ST-LINK part of the PCB can be cut out to reduce the board size. In this case the remaining target STM8S part can only be powered by VIN, E5V and 3V3 on ST morpho connector CN1 or VIN and 3V3 on Arduino™ connector CN5.

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UM2364 Hardware layout and configuration

The ST-LINK/V2-1 programming and debugging tool is integrated in the STM8S Nucleo board.

The embedded ST-LINK/V2-1 supports only SWIM for STM8S devices. For information about debugging and programming features refer to the ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 user manual (UM1075), which describes in details all the ST-LINK/V2 features.

The changes versus ST-LINK/V2 version are listed below.

• New features supported on ST-LINK/V2-1:

– USB software re-enumeration

– Virtual COM port interface on USB

– Mass storage interface on USB

– USB power management request for more than 100 mA power on USB

• Features not supported on ST-LINK/V2-1:

– SWIM interface

– Minimum supported application voltage limited to 3 V

• Known limitation:

– Activating the readout protection on ST-LINK/V2-1 target prevents the target application from running afterwards. The target readout protection must be kept disabled on ST-LINK/V2-1 boards.

A typical hardware setup for using the embedded ST-LINK/V2-1 is shown in

Figure 6 .

Figure 6. Typical configuration

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6.2.1 Driver

Before connecting the Nucleo-64 board to a Windows ® 7, Windows ® 8, or Windows ® 10 PC via USB, a driver for ST-LINK/V2-1 must be installed. It can be downloaded from the www.st.com

website.

In case the STM8S Nucleo-64 board is connected to the PC before installing the driver, the

PC device manager may report some Nucleo interfaces as “Unknown”.

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Hardware layout and configuration

Note:

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To recover from this situation, after installing the dedicated driver, the association of

“Unknown” USB devices found on the STM8S Nucleo-64 board with this dedicated driver, must be updated in the device manager manually.

It is recommended to proceed using USB Composite Device, as shown in

Figure 7 .

Figure 7. Updating the list of drivers in Device Manager

6.2.2 ST-LINK/V2-1 firmware upgrade

The ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the

USB port. As the firmware may evolve during the life time of the ST-LINK/V2-1 product (for example new functionality, bug fixes, support for new microcontroller families), it is recommended to periodically visit www.st.com

website before starting to use the STM8S

Nucleo board in order to stay up-to-date with the latest firmware version.

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6.3

6.3.1

Hardware layout and configuration

Power supply and power selection

The power supply is provided either by the host PC through the USB cable, or by an external source: VIN (7 V - 12 V), E5V (5 V) or 3V3 power supply pins on CN5 or CN1. In case VIN, E5V or 3V3 is used to power the STM8S Nucleo board, using an external power supply unit or an auxiliary equipment, this power source must comply with the standard

EN-60950-1: 2006+A11/2009, and must be Safety Extra Low Voltage (SELV) with limited power capability.

Power supply input from the USB connector

The ST-LINK/V2-1 supports USB power management allowing to request more than

100 mA current to the host PC.

All parts of the STM8S Nucleo board and shield can be powered from the ST-LINK USB connector CN6 (5V_STLINK or 5V_USB_CHG). Note that only the ST-LINK part is powersupplied before the USB enumeration as the host PC only provides 100 mA to the board at that time. During the USB enumeration, the STM8S Nucleo board requires 300 mA of current to the host PC. If the host is able to provide the required power, the STM8S microcontroller is powered and the green LED LD1 is turned ON, thus the STM8S Nucleo board and its shield can consume a maximum of 300 mA current, not more. If the host is not able to provide the required current, the STM8S microcontroller and the MCU part including the extension board are not power supplied. As a consequence the green LED LD1 remains turned OFF. In such case, it is mandatory to use an external power supply as explained in

Section 6.3.2: External power supply inputs: VIN and E5V on page 16

.

When the board is power supplied by USB (5V_STLINK_SW), a jumper must be connected

between pin 1 and pin 2 of JP2 as shown in Table 6: Power-related jumper on page 16

.

SB6 is configured according to the maximum current consumption of the board when powered by USB (5V_STLINK_SW). The SB6 solder bridge can be set in case the board is powered by USB and the maximum current consumption on 5V_STLINK_SW does not exceed 100 mA (including an eventual extension board or Arduino™ shield). In such condition, USB enumeration will always succeed since no more than 100mA is requested to the PC. Possible configurations of SB6 are summarized in

Table 4 .

Solder bridge state

SB6 OFF

SB6 ON

Table 4. SB9 configuration table

Power supply Allowed current

USB power through CN6

300 mA max

100 mA max

Note:

Warning: If the maximum current consumption of the Nucleo and its extension boards exceeds 300 mA, it is mandatory to power the Nucleo using an external power supply connected to E5V or VIN.

In case the board is powered by an USB charger, there is no USB enumeration, so led LD1 remains set to OFF permanently and the STM8S is not powered. In this specific case SB6 needs to be set to ON, thus allowing the STM8S to be powered anyway.

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Hardware layout and configuration

6.3.2 External power supply inputs: VIN and E5V

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The external power sources VIN and E5V are summarized in the

Table 5.

When the board is power supplied by VIN or E5V, the jumper configuration must be the following:

• VIN: jumper on JP2 pin 3 and pin 4

• E5V: jumper on JP2 pin 5 and pin 6

• Solder bridge SB6 OFF

Input power name

Connecto r pins

VIN

E5V

CN5 pin 8

CN1 pin 24

CN1 pin 6

Table 5. External power sources

Voltage range

Max current

Limitation

7 V to

12 V

800 mA

From 7 V to 12 V only, and input current capability linked to input voltage:

– 800 mA input current when V in

= 7 V

– 450 mA input current when 7 V < V in

<= 9 V

– 250 mA input current when 9 V < V in

< 12 V

4.75 V to

5.25 V

500 mA -

Jumper

Table 6. Power-related jumper

Description

5V_STLINK_SW (ST-LINK VBUS) is used as power source when JP2 is set as shown below (Default setting).

5V_VIN is used as power source when JP2 is set as shown below.

JP2

E5V is used as power source when JP2 is set as shown below.

5V_USB_CHG is used as power source when JP2 is set as shown below.

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UM2364 Hardware layout and configuration

Using VIN or E5V as external power supply

VIN or E5V can be used as external power supply in case the current consumption of the

STM8S Nucleo and extensions boards exceeds the allowed current on USB. In this condition, it is still possible to use the USB for communication, for programming or debugging only, but it is mandatory to power supply the board first using VIN or E5V, and then connect the USB cable to the PC. Proceeding this way ensures that the enumeration occurs thanks to the external power source.

The following power sequence procedure must be respected:

1.

Connect the jumper between pin 3 and pin 4 (VIN), or pin 5 and pin 6 (E5V) of JP2

2. Check that SB6 is OFF

3. Connect the external power source to VIN or E5V

4. Power on the external power supply 7 V< VIN < 12 V to VIN, or 5 V for E5V

5. Check that LD1 is turned ON

6. Connect the PC to USB connector CN6

If this order is not respected, the board may be supplied by 5V_STLINK first, then by VIN or

E5V, and the following risks may be encountered:

1.

If more than 300 mA current is needed by the board, the PC may be damaged or the current supply can be limited by the PC. As a consequence the board is not powered correctly.

2. 300 mA is requested at enumeration (since SB6 must be OFF) so a risk exists that the request is rejected and the enumeration does not succeed if the PC cannot provide such current. Consequently the board is not power supplied (LED LD1 remains OFF).

Input power name

It can be of interest to use the 3V3 (CN5 pin 4, or CN1 pin 16) directly as power input for instance in case the 3.3 V is provided by an extension board. When the STM8S Nucleo board is power supplied by 3V3, the ST-LINK is not powered, thus the programming and

debug features are unavailable. The external power source 3V3 is summarized in Table 7.

Connectors pins

Table 7. 3V3 external power source

Voltage range Limitation

3V3

CN5 pin 4

CN1 pin 16

3 V to 3.6 V

Used when the ST-LINK part of the PCB is cut off or

SB16 is OFF.

Two different configurations are possible when using 3V3 to power the board:

• ST-LINK is removed (PCB cut).

• SB16 (3.3 V regulator) is OFF.

When powered by USB, VIN or E5V, the +5 V (CN5 pin 5 and pin 1 or CN1 pin 18) can be used as output power supply for an Arduino™ shield or an extension board. In this case, the maximum current of the power source specified in

Table 5 on page 16 must be respected.

UM2364 Rev 1

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36

Hardware layout and configuration UM2364

The 3V3 (CN5 pin 4 or CN1 pin 16) can be used also as power supply output. The current is limited by the maximum current capability of the regulator U2 (1.2 A max).

6.4 LEDs

COM LD4 : the tricolor LED (green, orange, red) LD4 (COM) provides information about ST-

LINK communication status. LD4 default color is red. LD4 turns to green to indicate that communication is in progress between the PC and the ST-LINK/V2-1, with the following setup:

• Slow blinking Red/OFF: at power-on before USB initialization

• Fast blinking Red/OFF: after the first correct communication between the PC and

ST-LINK/V2-1 (enumeration)

• Red LED ON: when the initialization between the PC and ST-LINK/V2-1 is complete

• Green LED ON: after a successful target communication initialization

• Blinking Red/Green: during communication with target

• Green ON: communication finished and successful

• Orange ON: Communication failure

5 V ST-LINK LD3 : the red LED indicates that the current distribution could not be performed as expected.

User LD2 : the green LED is a user LED connected to Arduino™ signal D13 corresponding to STM8S I/O PC5 (pin 11). Refer to

Table 11 when:

• the I/O is HIGH value, the LED is ON

• the I/O is LOW, the LED is OFF

PWR LD1 : the green LED indicates that the STM8S part is powered and +5 V power is available.

6.5 Push-buttons

Note:

B1 USER : the user button is connected to the I/O PE4 (pin 52) of the STM8S microcontroller.

B2 RESET : this push-button is connected to T_NRST, and is used to reset the STM8S microcontroller.

The blue and black plastic hats that are placed on the push-buttons can be removed if necessary, for example when a shield or an application board is plugged on top of the

Nucleo board. This avoids pressure on the buttons and consequently a possible permanent

STM8S reset.

6.6 JP1 (T_NRST) and JP3 (IDD)

Jumper JP1 is not fitted and there is no incidence on STM32F103CBT6 (ST-LINK MCU)

T_NRST signal. When JP1 is connected, STM32F103CBT6 (ST-LINK MCU) T_NRST signal is connected to GND. The STM32F103CBT6 is forced in reset state.

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Jumper JP3, labeled IDD, is used to measure the STM8S microcontroller consumption by removing the jumper and by connecting an ammeter:

• Jumper ON: STM8S microcontroller is powered (default).

• Jumper OFF: an ammeter must be connected to measure the STM8S microcontroller current. If there is no ammeter, the STM8S microcontroller is not powered.

It is possible to select VDD to allow power supply of MCU in 3V3 or 5V:

• 3V3: pin 1 and 2 of JP3

• 5V: pin 2 and 3 of JP3

6.7 OSC clock supply

There are four ways to configure the pins corresponding to the external high-speed clock

(HSE):

• MCO from ST-LINK : MCO output of ST-LINK MCU is used as input clock. This frequency cannot be changed, it is fixed at 8 MHz and connected to PA1 of the STM8S microcontroller.

The following configuration is needed:

– SB14 OFF and S13 ON

– SB15 ON

– R15 and R16 removed

• HSE oscillator on-board from X2 crystal (not provided): for typical frequencies and their capacitors and resistors, refer to the STM8S microcontroller datasheet. The X2 crystal has the following characteristics: 8 MHz, 8 pF, and 50 ppm. It is recommended to use NX3225GD-8Mhz-EXS00A-CG04874 manufactured by NDK.

The following configuration is needed:

– SB13 and SB14 OFF

– R15 and R16 soldered

– C7 and C8 soldered with 12 pF capacitors

– SB15 OFF

• Oscillator from external PA1 : from an external oscillator through pin 23 of the CN1 connector.

The following configuration is needed:

– SB14 ON

– SB15 OFF

– R15 and R16 removed

• HSE not used : PA1 and PA2 are used as GPIOs instead of clock

The following configuration is needed:

– SB13 and SB14 ON

– SB15 (MCO) OFF

– R15 and R16 removed

UM2364 Rev 1

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36

Hardware layout and configuration UM2364

The USART3 interface available on PD5 and PD6 of the STM8S microcontroller is connected to ST morpho and Arduino™ connectors on D0 and D1. USART connection is

detailed in Table 8 .

USART name

USART3_TX

USART3_RX

Table 8. USART connection

STM8S pin ST morpho pin

PD5

PD6

35

37

Arduino™ connector

D1

D0

By default, the USART communication between the STM8S and STLINK-MCU is enabled, in order to support virtual COM port (SB11, SB12 OFF and SB17, SB19 ON).

If pins PA4 and PA5 are needed for any others applications as GPIO, SB11 and SB12 must

be ON, and SB17, SB19 must be OFF. In this case, the configuration is as shown in Table 9 .

Table 9. STM8S configuration of pins PE3 and PE4

STM8S GPIO

Solder Bridge

STM8S side

Solder Bridge

STLINK side

PA4 & PA5 inactive

PA4 & PA5 active

SB11,SB12 OFF

SB11,SB12 ON

SB17, SB19 ON

SB17, SB19 OFF

Bridge

SB1

SB2 (LD2-LED)

SB3

SB4

SB5

SB6

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Table 10. Solder bridges

State

(1)

Description

5V_USB_CHG is active.

5V_USB_CHG is not active.

Green user LED LD2 is connected to D13 of Arduino™.

Green user LED LD2 is not connected.

B1 push button is connected to PE4.

B1 push button is not connected to PE4.

PD1 is connected.

PD1 is not connected: T_SWIM is disconnected from target.

GND is connected to AGND.

GND is not connected to AGND.

USB power through CN6 allowed (100 mA max).

USB power through CN6 allowed (300 mA max).

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UM2364 Rev 1

UM2364 Hardware layout and configuration

Bridge

SB7, SB9 (ADC on A4 and A5)

SB8, SB10 (I

2

C on A4 and A5)

SB11, SB12

SB13, SB14 (X2 crystal)

SB15 (T_MCO)

SB16

SB17, SB19 (ST-LINK-USART)

SB18

Table 10. Solder bridges (continued)

State (1) Description

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

PB1 (ADC in) is connected to A4 and PB0 is connected to A5 (pin 5 and pin 6) on Arduino™ connector CN4 and ST morpho connector

CN1 (pin 36 and pin 38). Thus SB8 and SB10 must be OFF.

PB1 (ADC in) is disconnected from A4 and PB0 (ADC in) is disconnected from A5 (pin 5 and pin 6) on Arduino™ connector

CN4 and ST morpho connector CN1 (pin 36 and pin 38).

PE1 (I

2

C) is connected to A5 and PE2 (I

2

C) is connected to A4 (pin

5 and pin 6) on Arduino™ connector CN4 and ST morpho connector CN1 (pin 36 and pin 38) as I

2

C signals. Thus SB7 and

SB9 must be OFF.

PE1 (I

2

C) is disconnected from A5 and PE2 (I

2

C) is disconnected from A4 (pin 5 and pin 6) on Arduino™ connector CN4 and ST morpho connector CN1 (pin 36 and pin 38).

PA4 and PA5 (pin 10 and pin 11) connected to CN1.

PA4 and PA5 (pin 10 and pin 11) disconnected from CN1.

PA1 and PA2 (pin 2 and pin 3) are connected to CN1 (pin 23 and pin 25) (R15, R16 and SB15 must not be fitted).

X2, C7, C8, R15 and R16 provide a clock as shown in Appendix A:

Electrical schematics on page 29

. PA1 and PA2 (pin 2 and pin 3) are disconnected from CN1 (pin 23 and pin 25).

MCO on STM32F103CBT6 (ST-LINK MCU) is connected to PA1 on

STM8S.

MCO on STM32F103CBT6 (ST-LINK MCU) is disconnected from

PA1 on STM8S.

Output of voltage regulator LDL112PV33R is connected to 3V3.

Output of voltage regulator LDL112PV33R is not connected.

PA2 and PA3 on STM32F103CBT6 (ST-LINK MCU) are connected respectively to PA4 and PA5 (pin 10 and pin 11) on STM8S to have

USART communication between them. Thus SB12 and SB11 must be OFF.

PA2 and PA3 on STM32F103CBT6 (ST-LINK MCU) are disconnected from respectively PA4 and PA5 (pin 10 and pin 11) on

STM8S.

Reserved.

Reserved.

1. The default SB state is shown in bold.

UM2364 Rev 1

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36

Hardware layout and configuration UM2364

6.10 Extension connectors

Figure 8 shows the signals connected by default to Arduino™ Uno V3 connectors (CN4,

CN5, CN7, CN8) and to ST morpho connector (CN1 and CN9), for STM8S208RBT6 Nucleo board.

Figure 8. NUCLEO-8S208RB

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UM2364 Hardware layout and configuration

CN4, CN5, CN7 and CN8 are female connectors compatible with the Arduino™ standard.

Most shields designed for Arduino™ can fit the STM8S Nucleo board.

The Arduino™ connectors on STM8S Nucleo board support Arduino™ Uno V3.

For compatibility with Arduino™ Uno V1, apply the following modifications:

• SB8 and SB10 ON,

• SB7 and SB9 OFF to connect I

2

C on A4 (pin 5) and A5 (pin 6 of CN4).

Caution 1: The I/Os of the STM8S microcontroller are 3.3 V-compatible instead of 5 V for Arduino™

Uno V3.

Table 11 shows the pin assignment of the STM8S microcontroller on Arduino™ connectors.

Connector

CN5 power

CN4 analog

Pin

8

1

2

3

4

5

6

1

2

3

4

5

6

7

Table 11. Arduino™ connectors on NUCLEO-8S208RB

Pin name STM8S pin Function

VIN

A0

A1

A2

A3

A4

A5

+5V_VIN

IOREF

RESET

3V3

+5V

GND

GND

Left connectors

-

-

T_NRST

-

-

-

-

-

PB5

PB4

PB3

PB2

PE2 or PB1

(1)

PE1or PB0

(1)

5 V input

3.3 V Ref

RESET

3.3 V input/output

5 V output ground ground

Power input

Analog input 5

Analog input 4

Analog input 3

Analog input 2

I2C1_SDA (PE2) or Analog input 1 (PB1)

I2C_SCL (PE1) or Analog input 0 (PB0)

UM2364 Rev 1

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36

Hardware layout and configuration

Connector

Table 11. Arduino™ connectors on NUCLEO-8S208RB (continued)

Pin Pin name STM8S pin Function

CN8 digital

CN7 digital

7

6

5

1

8

3

2

4

3

2

1

5

4

7

6

10

9

8

1. Refer to Table 10: Solder bridges for details.

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

D15

D14

AREF

GND

D13

D12

D11

Right connectors

PE1

PE2

-

-

PC5

PC7

PC6

PE5

PC4

PD3

PD1

PC3

PC2

PG0

PC1

PE0

PD5

PD6

I2C_SCL

I2C_SDA

VDDA ground

SPI1_SCK

SPI1_MISO

SPI1_MOSI

SPI1_NSS

TIM_CH4

TIM2_CH2

SWIM

TIM1_CH3

TIM1_CH2

CAN_TX

TIM1_CH1

CLK_CCO

UART3_TX

UART3_RX

UM2364

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UM2364 Hardware layout and configuration

6.12 ST morpho connector

The ST morpho connector consists in male pin headers (CN1 and CN9) accessible on both sides of the board. They can be used to connect the STM8S Nucleo board to an extension board or a prototype/wrapping board placed on top or on bottom side of the STM8S Nucleo board. All signals and power pins of the STM8S are available on the ST morpho connector.

This connector can also be probed by an oscilloscope, logical analyzer or voltmeter.

Table 12 shows the pin assignments of the STM8S on the ST morpho connector.

CN1 odd pins

Table 12. ST morpho connector on NUCLEO-8S208RB

CN1 even pins CN9 odd pins CN9 even pins

Pin Name Name Pin Pin Name Name

17

19

21

23

25

27

5

7

1

3

9

11

13

15

29

31

33

35

37

-

GND

-

PA1

PA2

PA3

PG4

PG5

VDD

PE7

-

-

PE6

PI0

PA4

PA5

-

PA6

-

PG7

PG6

E5V

GND

-

IOREF VDD

RESET T_NRST

3V3

+5V

GND

GND

VIN

-

PB5

PA4

PB3

PB2

PE2 or PB1

(2)

PE1 or PB0

(2)

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

35

37

1. 5V_STLINK is 5 V power from ST-LINK/V2-1 USB connector and it rises before +5V.

2. Refer to Table 10: Solder bridges for details.

PE5

PC4

PD3

PD1

PC3

PC2

PD7

PE1

PE2

VDDA

GND

PC5

PC7

PC6

PG0

PC1

PE0

PD5

PD6

PB7

PB6

PD4

5V_STLINK (1)

PF7

PF6

PF5

PF4

PF3

GND

PF0

PD2

PD0

PG1

PE4

AGND

PE3

PG3

PG2

Pin

18

20

22

24

26

28

6

8

2

4

10

12

14

16

30

32

34

36

38

UM2364 Rev 1

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36

Product history and limitations

7 Product history and limitations

UM2364

7.1 Identification

The sticker located on the top of the PCB shows the information about the STM8S Nucleo-

64 board product identification such as board reference, revision and serial number. The format of the identification is the following:

• Bxxxx p-bb : The board reference is MB1345, p corresponds to the PCB revision and bb to the BOM revision: for example C-02 stands for PCB revision C and BOM revision 02.

• yywwnnnn : yy are the two last digits of the manufacturing year, ww identifies the manufacturing week and nnnn is the board serial number.

Revision C-02

Revision C-02 of the STM8S208RBT6-based Nucleo-64 board is the initial released version.

Revision C-02

It is recommended, when measuring the IDD current, to take into account the fact that

ST-LINK pins must be isolated. Otherwise, it is necessary to put a jumper on JP1 when performing such measurement.

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UM2364 Rev 1

UM2364

8 CE Compliance Statement

8.1

CE Compliance Statement

Electromagnetic compatibility and immunity

The sample examined is in conformance with the requirements of below standards:

• EN 55032:2015

• EN 61000-3-2:2014

• EN 61000-3-3:2013

• EN 55024:2010 +A1:2015

UM2364 Rev 1

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36

FCC Compliance Statement UM2364

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on, the user is encouraged to try to correct interference by one or more of the following measures:

• Reorient or relocate the receiving antenna

• Increase the separation between the equipment and receiver

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected

• Consult the dealer or an experienced radio/TV technician for help

Any changes or modifications to this equipment not expressly approved by

STMicroelectronics may cause harmful interference and void the user's authority to operate this equipment.

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UM2364 Rev 1

UM2364

Appendix A Electrical schematics

Electrical schematics

This appendix presents the electrical schematics of the STM8S Nucleo-64 board:

•

Figure 9: STM8S Nucleo board top schematics

•

Figure 10: STM8S I/Os

•

Figure 11: STM8S power

•

Figure 12: Arduino™ extension connectors

•

Figure 13: Nucleo power

•

Figure 14: ST-LINK/V2 SWIM

UM2364 Rev 1

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36

Figure 9. STM8S Nucleo board top schematics

U_Power

Power.SchDoc

U_STM8S208RBT6 microcontroller power

STM8S208RBT6 microcontroller power.SchDoc

U_ST-LinkV2_SWIM

ST-LinkV2_SWIM.SchDoc

T_VCP_TX

T_VCP_RX

T_MCO

T_SWIM

T_NRST

U_Arduino_extension_connectors

Arduino_extension_connectors.SchDoc

T_NRST

PA[1..6]

PB[0..7]

PC[1..7]

PD[0..7]

PE[0..7]

PF0

PF[3..7]

PG[0..7]

PI0

U_STM8S208RBT6 microcontroller IOs

STM8S208RBT6 microcontroller IOs.SchDoc

T_VCP_TX

T_VCP_RX

T_MCO

T_SWIM

T_NRST

PA[1..6]

PB[0..7]

PC[1..7]

PD[0..7]

PE[0..7]

PF0

PF[3..7]

PG[0..7]

PI0

Title: Top

Project: STM8S208RBT6 Nucleo

Variant: [No Variations]

Revision: -

Size: A4 Date: 11-Apr.-17

Reference:

Sheet: 2

MB1345 of 7

Figure 10. STM8S I/Os

PA[1..6]

PA[1..6]

PB[0..7]

PB[0..7]

PC[1..7]

PC[1..7]

PD[0..7]

PD[0..7]

PE[0..7]

PE[0..7]

PF0

PF0

PF[3..7]

PF[3..7]

PG[0..7]

PG[0..7]

PI0

PI0

T_VCP_RX

Fitted: NO

Fitted: NO

PA4

PA5

SB12

SB11

T_VCP_TX

D7

T_SWIM

PD1 SB4

PA3

A5

A4

A3

A2

A1

A0

D8

D1

D0

D3

D5

D6

D9

D13

D11

D12

PA6

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PD0

PD2

PD3

PD4

PD5

PD6

PD7

9

10

11

12

30

29

28

27

26

25

24

23

34

35

36

37

38

41

42

61

62

63

64

57

58

59

60

U3A STM8S208RBT6

[TIM3_CH1] TIM2_CH3/PA3

UART1_RX/ (HS) PA4

UART1_TX/ (HS) PA5

UART1_CK/ (HS) PA6

[TIM1_CH1N] AIN0/PB0

[TIM1_CH2N] AIN1/PB1

[TIM1_CH3N] AIN2/PB2

[TIM1_ETR] AIN3/PB3

[I2C_SCL] AIN4/PB4

[I2C_SDA] AIN5/PB5

AIN6/PB6

AIN7/PB7

PE0 (HS)/CLK_CCO

PE1 (T)/I2C_SCL

PE2 (T)/I2C_SDA

PE3/TIM1_BKIN

PE4

PE5/SPI_NSS

AIN9/PE6

AIN8/PE7

AIN10/ PF0

AIN11/PF3

AIN12/PF4

AIN13/PF5

AIN14/PF6

AIN15/PF7 PC1 (HS)/TIM1_CH1

PC2 (HS)/TIM1_CH2

PC3 (HS)/TIM1_CH3

PC4 (HS)/TIM1_CH4

PC5 (HS)/SPI_SCK

PC6 (HS)/SPI_MOSI

PC7 (HS)/SPI_MISO

PG1/CAN_RX

PG2

PG3

PG4

PG5

PD0 (HS)/TIM3_CH2 [TIM1_BKIN] [CLK_CCO]

PD1 (HS)/SWIM

PD2 (HS)/TIM3_CH1[TIM2_CH3]

PD3 (HS)/TIM2_CH2[ADC_ETR]

PG6

PG7

PI0

PD4 (HS)/TIM2_CH1 [BEEP]

PD5/UART3_TX

PD6/UART3_RX

PD7/TLI

PG0/CAN_TX

NRST

OSCIN/PA1

OSCOUT/PA2

56

55

54

53

52

33

32

31

22

17

16

15

14

13

43

44

45

46

47

49

50

51

48

1

2

3

VDD

PG0

PG1

PG2

PG3

PG4

PG5

PG6

PG7

PI0

PF0

PF3

PF4

PF5

PF6

PF7

PE0

PE1

PE2

PE3

PE4

PE5

PE6

PE7

T_NRST

PA1

PA2

D2

D15

D14

D10

D4

SB3

B1

USER[BLUE]

R6

4K7

R5

SB15

0R

T_MCO

R16

0R

Fitted: NO

R15

0R

Fitted: NO

C8

12PF

Fitted: NO

X2

8MHZ

Fitted: NO

C7

12PF

Fitted: NO

100R

C5

100nF

B1_1 switch hat_blue

1

B2

2

T_NRST

RESET[BLACK]

3

4

C25

B2_1 switch hat_black

100nF

Title: STM8S208RBT6 microcontroller I/Os

Project: STM8S208RBT6 Nucleo

Variant: [No Variations]

Revision: Reference:

Size: A4 Date: 11-Apr.-17 Sheet: 3

MB1345 of 7

Figure 11. STM8S power

VDD L1

Bead

SB5

AGND

VDD

VDDA

7

U3B

VDD

STM8S208RBT6

VSS

40

VDDIO_2 VSSIO_2

8

VDDIO_1 VSSIO_1

19

VDDA VSSA

18

VREF+

VCAP

C23

100nF 21

VREF-

6

5

39

4

20

C15

2.2uF

AGND

AGND Ceramic capacitor (Low ESR)

VDD

C28

1uF

C14

100nF

C29

100nF

C13

100nF

VDDA

C24

1uF

C17

100nF

AGND

Title: STM8S208RBT6 microcontroller power

Project: STM8S208RBT6 Nucleo

Variant: [No Variations]

Revision: Reference:

Size: A4 Date: 11-Apr.-17 Sheet: 4

MB1345 of 7

Figure 12. Arduino™ extension connectors

PA[1..6]

PA[1..6]

PB[0..7]

PB[0..7]

PC[1..7]

PC[1..7]

PD[0..7]

PD[0..7]

PE[0..7]

PE[0..7]

PF0

PF0

PF[3..7]

PF[3..7]

PG[0..7]

PG[0..7]

PI0

PI0

T_NRST

T_NRST

PA1

PA2

VDD

PG4

PG5

PE7

PE6

PI0

SB14 Fitted: NO

SB13 Fitted: NO

PA3

PA4

PA5

PA6

Morpho connector

CN1

1

3

2

4

PG7

PG6

29

31

33

35

21

23

25

27

13

15

17

19

9

11

5

7

37

E5V

IOREF

T_NRST

30

32

34

36

22

24

26

28

14

16

18

20

6

8

10

12

38

2.54mm 2x19

5V_VIN

VDD

5V

3V3

PB5

PB4

PB3

PB2

VIN

A0

A1

A2

A3

A4

A5

R4

1K

4

5

6

1

2

3

3

4

1

2

5

6

7

8

CN5

2.54mm 1x8

CN4

PB1

PB0

SB9

SB7

SB8

SB10

MCU

2.54mm 1x6

PE1

PE2

Fitted: NO

Fitted: NO

SB8,SB10

Close only for I2C on A4/A5

Q2 2N7002 LD2

GREEN

R23

510R

R26 1M

VDD

SB2

VDDA

CN8

10

9

8

7

6

5

4

3

2

1

D15_SCL

D14_SDA

D13_SPI_SCK

D12_MISO

D11_TIM_MOSI

D10_TIM_SPI_CS

D9_TIM

D8_IO

PE1

PE2

PC5

PC7

PC6

PE5

PC4

PD3

2.54mm 1x10

CN7

8

7

6

5

4

3

2

1

D7_IO

D6_TIM

D5_TIM

D4_IO

D3_TIM

D2_IO

D1_TX

D0_RX

2.54mm 1x8

PD1

PC3

PC2

PG0

PC1

PE0

PD5

PD6

PD7

29

31

33

35

21

23

25

27

13

15

17

19

9

11

5

7

37

Morpho connector

CN9

1

3

2

4

PB7

PB6

PD4

30

32

34

36

22

24

26

28

14

16

18

20

6

8

10

12

38

PF7

PF6

PF5

PF4

PF3

PF0

PD2

PD0

PG1

PE4

PE3

PG3

PG2

2.54mm 2x19

5V_STLINK

AGND

Title: Arduino extension connectors

Project: STM8S208RBT6 Nucleo

Variant: [No Variations]

Revision: -

Size: A4 Date: 11-Apr.-17

Reference:

Sheet: 5

MB1345 of 7

Figure 13. Nucleo power

VIN

3

C30

10uF

U5

Vin

LD1117S50TR

Vout

Gnd

Tab

2

4

C31

10uF

5V_VIN

HW2

5V_STLINK_SW

5V_VIN

E5V

5V_USB_CHG

E5V from Morpho connector

5V_CHG from USB-STLINK CONNECTOR

5

7

1

3

JP2

6

8

2

4

2.54mm 2x4

5V

R10

510R

LD1

GREEN

C12

1uF

6

U2

VIN

LDL112PV33R

ADJ

1

EN VOUT

NC

C11

100nF

3

4

5

IDD Measurement

HW3

SB16

3V3 VDD 5V

C10

1uF

C9

100nF

JP3

2.54mm 1x3

VDD select to allow power supply of MCU in 3V3 or 5V

Title: Power

Project: STM8S208RBT6 Nucleo

Variant: [No Variations]

Revision: -

Size: A4 Date: 11-Apr.-17

Reference:

Sheet: 6

MB1345 of 7

3V3_STLINK

HW1

Fitted: NO

JP1

Fitted: NO

5V

C16

100nF

C18

100nF

C6

100nF

C2

100nF

3V3_STLINK

Board Ident: PC13=0

R7 10K

R3 10K

Fitted: NO

3V3_STLINK

C1

100nF

C3

12PF

X1

8MHZ

3V3_STLINK

VDD

R2

R1

C4

12PF

STLK_OSC_IN

STLK_OSC_OUT

STLK_RST

4K7

4K7

AIN_1

5

6

7

3

4

1

2

10

11

8

9

12

VBAT

PC13

PC14

PC15

OSCIN

OSCOUT

NRST

VSSA

VDDA

PA0

PA1

PA2

Figure 14. ST-LINK/V2 SWIM

D1

R18

BAT60JFILM

SB6

Fitted: NO

R11 100K

2K7 R17 4K7

CN2

3V3_STLINK

3

4

1

2 STLINK_SWCLK

STLINK_SWDIO

Fitted: NO

3V3_STLINK

VDD_2

VSS_2

JTMS/SWDIO

PA12

PA11

PA10

PA9

PA8

PB15

PB14

PB13

PB12

36

35

34

33

32

31

30

29

28

27

26

25

STLINK_SWDIO

STLINK_USB_D_P

STLINK_USB_D_N

LED_STLINK

R19 100R

PWR_ENn

Must be located the closest to the MCU

T_MCO

C22

20pF

Fitted: NO

SWIM_IN

R8

220R

SWIM_RST_IN

R13

220R

T_VCP_RX

T_VCP_TX

SB19

SB17

STLINK_TX

STLINK_RX

SB18

U1

STM32F103CBT6TR

3V3_STLINK

Wired on Solder Side

1

CN3

2

1

2.54mm 1X2

CN10

2

2.54mm 1X2

VDD

SWIM

SWIM_RST

R12

680R

R9

47R

R14

47R

T_SWIM

T_NRST

3V3_STLINK

LD4

Green

R29

330R

R30

330R

3

2

4

1

Red

COM LED

5V_STLINK

C33

1uF

R28

10K

Ilim = 625mA

1.2Ilim = 750mA < Isc

1.5Ilim = 938mA > Isc

R32

1K

5 Volts ST-LINK

R31

100K

FAULT 8

1

2

U7

IN

IN

ST890

OUT

OUT

FAULT

SET

6

7

5 SET

PWR_ENn

LD3

3

ON GND

4

5V_STLINK_SW

R27

2K2 C32

100nF

CN6 UBAF-011A

VBUS

DM

DP

ID

GND

Shield

Shield

Shield

Shield

EXP

EXP

6

7

8

9

10

11

3

4

1

2

5

SB1

R25

100K

5V_STLINK

5V_USB_CHG

Diff pair 90Ohm i i

Diff pair 90Ohm

1

2

3

U6

IO1

GND

IO2

USBLC6-2P6

IO_1

VBUS

IO_2

6

5

4

STLINK_USB_D_N

STLINK_USB_D_P

R24 1K5

Q1

MMBT9013

3V3_STLINK

5V_STLINK

R21 36K

R22

R20

10K

100R

5V_STLINK

USB_RENUMn

5V_STLINK

5V_VIN

E5V

BAT60JFILM

D4

BAT60JFILM

D3

BAT60JFILM

D2

3V3_STLINK

C26

1uF

1

U4

Vin

LD3985M33R

Vout

5

3

INH

GND BYPASS

C27

100nF

C21

10nF

C20

1uF

C19

100nF

Title: ST-Link/V2 SWIM mode

Project: STM8S208RBT6 Nucleo

Variant: [No Variations]

Revision: -

Size: A4 Date: 11-Apr.-17

Reference:

Sheet: 7

MB1345 of 7

Revision history

Revision history

Date

3-May-2018

Table 13. Document revision history

Revision Changes

1 Initial release.

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UM2364 Rev 1

UM2364

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