Discovery kit for STM32F401 line - keilpack.azureedge.net · Discovery kit for STM32F401 line...

September 2013 DocID025174 Rev 1 1/39

UM1669User manual

Discovery kit for STM32F401 line

Introduction

The STM32F401 Discovery kit (32F401CDISCOVERY) helps you to discover the entry level of the STM32F4 series and to develop your applications. It is based on an STM32F401VCT6 and includes an ST-LINK/V2 embedded debug tool interface, ST MEMS Gyroscope, ST MEMS accelerometer + magnetometer, ST MEMS digital microphone, audio DAC with integrated class D speaker driver, LEDs, pushbuttons and a USB OTG micro-AB connector.

Figure 1. STM32F401 Discovery board

www.st.com

http://www.st.com

Contents UM1669

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Contents

1 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 Development toolchain supporting the STM32F401 Discovery kit . . . . . . . 7

2.4 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 STM32F401VCT6 microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.2 Embedded ST-LINK/V2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.2.1 Using ST-LINK/V2 to program/debug the STM32F401 on board . . . . . 16

4.2.2 Using ST-LINK/V2 to program/debug an external STM32 application . . 17

4.3 Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.4 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.5 Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.6 On board audio capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.7 USB OTG supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.8 E-compass MEMS (ST MEMS LSM303DLHC) . . . . . . . . . . . . . . . . . . . . 19

4.9 Gyroscope MEMS (ST MEMS L3GD20) . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.10 JP2 (Idd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.11 OSC clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.11.1 OSC clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.11.2 OSC 32 KHz clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.12 Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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

5 Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6 Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

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UM1669 Contents

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7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

List of tables UM1669

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List of tables

Table 1. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 2. Features and benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Table 3. Jumper states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Table 4. Debug connector CN2 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Table 5. Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Table 6. MCU pin description versus board function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Table 7. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

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UM1669 List of figures

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List of figures

Figure 1. STM32F401 Discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 1. Hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 2. Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 3. Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 4. STM32F401VCT6 microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 5. STM32F401VCT6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 6. Typical configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 7. STM32F401 Discovery board connections image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 8. ST-Link connections image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 9. STM32F401 Discovery board mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Figure 10. STM32F401 Discovery board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Figure 11. ST-LINK/V2 (SWD only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Figure 12. STM32F401VCT6 MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Figure 13. Audio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Figure 14. USB_OTG_FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Figure 15. Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Conventions UM1669

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1 Conventions

Table 1 provides the definition of some conventions used in the present document.

Table 1. ON/OFF conventions

Convention Definition

Jumper JPx ON Jumper fitted

Jumper JPx OFF Jumper not fitted

Solder bridge SBx ON SBx connections closed by solder

Solder bridge SBx OFF SBx connections left open

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UM1669 Quick start

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2 Quick start

The STM32F401 Discovery is a low-cost and easy-to-use development kit to quickly evaluate and start a development with an STM32F4 entry level microcontroller.

Before installing and using the product, please accept the Evaluation Product License Agreement from www.st.com/stm32f4-discovery.

For more information on the STM32F401 Discovery board and for demonstration software, visit www.st.com/stm32f4-discovery.

2.1 Getting started

Follow the sequence below to configure the STM32F401 Discovery board and launch the DISCOVER application:

1. Ensure that the jumpers JP2 and CN3 are set to "on" (Discovery mode).

2. Connect the STM32F401 Discovery board to a PC using a USB cable type A/mini-B through the USB ST-LINK connector CN1, to power the board. The LED LD2 (PWR) will light up and the four LEDs between the buttons B1 and B2 start blinking.

3. Press the user button B1 to enable the MEMS sensor. The four LEDs will indicate the board motion direction and speed. When connected to a PC with a second USB type A/micro-B cable through CN5, the board will be recognized as a standard mouse.

4. The demo software, as well as other software examples that allow you to discover the STM32 F4 series features, are available on www.st.com/stm32f4-discovery.

5. Develop your own applications starting from the examples.

2.2 System requirements

• Windows PC (XP, Vista, 7)

• USB type A to mini-B cable

2.3 Development toolchain supporting the STM32F401 Discovery kit

• Altium: TASKING™ VX-Toolset

• Atollic: TrueSTUDIO

• IAR: EWARM

• Keil™: MDK-ARM

2.4 Order code

To order the STM32F401 Discovery kit, use the STM32F401C-DISCO order code.

Features UM1669

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3 Features

The STM32F401 Discovery board offers the following features:

• STM32F401VCT6 microcontroller featuring 256 KB of Flash memory, 64 KB of RAM in an LQFP100 package

• On-board ST-LINK/V2 with selection mode switch to use the kit as a standalone ST-LINK/V2 (with SWD connector for programming and debugging)

• Board power supply: through USB bus or from an external 5 V supply voltage

• External application power supply: 3 V and 5 V

• L3GD20, ST MEMS motion sensor, 3-axis digital output gyroscope.

• LSM303DLHC, ST MEMS system-in-package featuring a 3D digital linear acceleration sensor and a 3D digital magnetic sensor.

• MP45DT02, ST MEMS audio sensor, omnidirectional digital microphone

• CS43L22, audio DAC with integrated class D speaker driver

• Eight LEDs:

– LD1 (red/green) for USB communication

– LD2 (red) for 3.3 V power on

– Four user LEDs: LD3 (orange), LD4 (green), LD5 (red) and LD6 (blue)

– Two USB OTG LEDs:LD7 (green) VBus and LD8 (red) over-current

• Two pushbuttons (user and reset)

• USB OTG with micro-AB connector

• Extension header for LQFP100 I/Os for a quick connection to the prototyping board and an easy probing

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UM1669 Hardware layout

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4 Hardware layout

The STM32F401 Discovery board has been designed around the STM32F401VCT6 microcontroller in a 100-pin LQFP package.

Figure 1 illustrates the connections between the STM32F401VCT6 and its peripherals (ST-LINK/V2, pushbutton, LED, Audio DAC, USB, ST MEMS gyroscope, ST MEMS accelerometer + magnetometer, ST MEMS microphone, and connectors).

Figure 2 and Figure 3 help you to locate these features on the STM32F401 Discovery board.

Figure 1. Hardware block diagram

EmbeddedST-LINK/V2

STM32F401VCT6

I/O I/O

I/O RESET

LEDsLD3...LD8

MP45DT02

B2RESET

B1USER

L3GD20

Micro-USB

Mini-USB

SWD

Head

er

Head

er

CS43L22

Mini-Jack

MS31947V2

LSM303DLHC

Hardware layout UM1669

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Figure 2. Top layout

MS32361V1

ST-LINK/V2ST-LINK/V2

LD1 (red/green LED)COM

CN2SWD connector

LD2 (red LED)PWR

CN3ST-LINK/DISCOVERY selector

STM32F401VCT6

LD3 (orange LED)

LD5 (red LED)

B2 reset button

LD8 (red LED)LD7 (green LED)

LD6 (blue LED)

LD4 (green LED)

B1 user button

JP2IDD measurement

SB1 (B2-RESET)

5 V power supply input/output

3 V power supply output

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Figure 3. Bottom layout

MS32362V1

SB3, SB5, SB7, SB9 (DEFAULT) SB10, SB11 (RX, TX)

SB2, SB4, SB6, SB8 (RESERVED)

SB15 (SWO)

SB16 (X2 crystal)

SB17 (X3 crystal)

SB18 (X3 crystal)

SB19 (BOOT0)

SB12 (STM_RST)

SB14 (X2 crystal)

SB13 (NRST)

SB20 (BOOT1)

SB21 (B1-USER)


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4.1 STM32F401VCT6 microcontroller

This ARM Cortex-M4 32-bit MCU with FPU has 105 DMIPS, up to 256 KB Flash/64 KB RAM, USB OTG FS, 10 TIMs, 1 ADC, 11 comm. interfaces.

Figure 4. STM32F401VCT6 microcontroller

This device provides the following benefits (see Table 2).

MS32365V1

STM32F401VCT6

256 Kbytes of Flash memory64 Kbytes of RAM

LQFP100 14 x 14 mm

Table 2. Features and benefits

Features Benefits

High performance

– Up to 84 MHz/105 DMIPS Cortex-M4 with single cycle DSP MAC and floating point unit

– CoreMark: 285 at 84 MHz

– CoreMark/MHz:3.39

– Boosted execution of control algorithms

– More features for your applications

– Ease of use

– Better code efficiency

– Faster time to market

– Elimination of scaling and saturation

– Easier support for meta-language tools

Maximum integration

– Up to 256 kB of on-chip Flash, 64k B of SRAM, reset circuit, internal RCs, PLLs, ultra-small packages (WLCSP)

More features in space-constrained applications

Designed for high performance and ultra-fast data transfers

– ART Accelerator™: memory accelerator

Performance equivalent to zero-wait execution from Flash

– 32-bit 7-layer bus matrix with 6 masters and 5 slaves including 1 block of SRAM

– Multi DMA controllers: 2 general-purposeConcurrent execution and data transfer

Outstanding power efficiency

– Ultra-low dynamic power in Run mode: 140 µA/MHz at 84 MHz running CoreMark benchmark from Flash memory (peripherals off)

– RTC <1 µA typ in VBAT mode

– Down to 11 µA typ in Stop mode

– 3.6 V down to 1.7 V VDD

– 1.2 V voltage regulator with power scaling capability

Extra flexibility to reduce power consumption for applications requiring both high-processing and low-power performance when running at low voltage or on a rechargeable battery

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Superior and innovative peripherals and connectivity

– 1x USB OTG

– Up to 11 communication interfaces (including 3x USART, 4x SPI, 3x I2C with digital filter, 1 SDIO)

– USART at up to 10.5 Mbit/s

– SPI at up to 42 Mbit/s

New possibilities to connect and communicate high-speed data

Audio:

– dedicated audio PLL, 2x I2SHigh-quality audio support

Analog:

– 1 x 12-bit ADC reaching 2.4 MSPS

– Up to 10 timers: 16 and 32 bits running up to 84 MHz

More precision thanks to high resolution

High integration

– WLCSP49 3 x 3 mm (STM32F401, 256-Kbyte Flash/ 64-Kbyte SRAM)

Smaller board space allowing for smaller applications

Extensive tools and software solutions

– Hardware sector protection with execute only access

– Various IDE, starter kits, libraries, RTOS and stacks, either open source or provided by ST or 3rd parties, including the ARM CMSIS DSP library optimized for Cortex-M4 instructions

– Software IP protection

– A wide choice within the STM32 ecosystem to develop your applications

Table 2. Features and benefits (continued)

Features Benefits


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Figure 5. STM32F401VCT6 block diagram

GPIO PORT A

AHB/APB2

EXT IT. WKUPup to 81 AF

PA[15:0]

TIM1 / PWM4 compl. channels TIM1_CH1[1:4]N,

4 channels TIM1_CH1[1:4]ETR,BKIN as AF

USART1RX, TX, CK,CTS, RTS as AF

SPI1MOSI, MISO,SCK, NSS as AF

APB

2 60

MH

z

AP

B1

30M

Hz

16 analog inputs

VDDREF_ADC

MOSI/SD, MISO/SD_ext, SCK/CKNSS/WS, MCK as AF

SP3/I2S3

ALARM_OUT

OSC32_INOSC32_OUT

VDDA, VSSANRST

smcardirDA

16b

VBAT = 1.65 to 3.6 V

DMA2

SCL, SDA, SMBA as AFI2C3/SMBUS

JTAG & SW

ARM Cortex-M4 84 MHz

NVICETMMPU

TRACECLKTRACED[3:0]

DMA2

8 StreamsFIFO

AC

CE

L/C

AC

HE

AHB1 84 MHz

USART 2MBpsTemperature sensor

ADC1 IF

@VDDA

POR/PDRBOR

Supplysupervision

@VDDA

PVD

Int

POR reset

XTAL 32 kHz

MANAGT

RTC

RC HS

RC LS

PWRinterface

WDG 32K

@VBAT

@VDDA

@VDD

AWU

Reset &clockcontrol

PLL1&2A

PB

2CLK

VDD = 1.7 to 3.6 V

VSSVCAP

Voltageregulator

3.3 to 1.2 V

VDD Power managmt

@VDD

STAMP1 Backup register

AH

B b

us-m

atrix

7S

4M

AP

B2

84 M

Hz

LS

TIM9

2 channels as AF

Flashup to 256 KB

TIM2

TIM3

TIM4

TIM5

D-BUS

MS31144V2

FPU

AP

B1

42 M

Hz

(max

)

AHB2 84 MHz

NJTRST, JTDI,JTCK/SWCLK

JTDO/SWD, JTDO

I-BUS

S-BUS

DMA1

8 StreamsFIFO

PB[15:0]

PC[15:0]

PH[1:0]

GPIO PORT B

GPIO PORT C

GPIO PORT H

16b

TIM10 16b

TIM11 16b

smcardirDA USART6

1 channel as AF

1 channel as AF

RX, TX, CK as AF I2C2/SMBUS

I2C1/SMBUS

SCL, SDA, SMBA as AF

SCL, SDA, SMBA as AF

SP2/I2S2 MOSI/SD, MISO/SD_ext, SCK/CKNSS/WS, MCK as AF

RX, TX as AFCTS, RTS as AFUSART2

smcardirDA

32b

16b

16b

32b

4 channels

4 channels, ETR as AF



DMA1

AHB/APB1

LS

OSC_INOSC_OUT

HC

LK

XTAL OSC4- 16MHz

SRAM 64 KB

WWDG

AP

B1C

LK

AH

B1P

CLK

AH

B2P

CLK

CRC

(PDR OFF)1.8 to 3.6 V(PDR ON)

SDIO / MMC

FIFOD[7:0]

CMD, CK as AF

USBOTG FS FI

FO

PH

Y DPDMID, VBUS, SOF

SPI4MOSI, MISO,SCK, NSS as AF

PD[15:0] GPIO PORT D

PE[15:0] GPIO PORT E

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4.2 Embedded ST-LINK/V2

The ST-LINK/V2 programming and debugging tool is integrated on the STM32F401 Discovery board. The embedded ST-LINK/V2 can be used in 2 different ways according to the jumper states (see Table 3):

• Program/debug the MCU on board,

• Program/debug an MCU in an external application board using a cable connected to SWD connector CN2.

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

Figure 6. Typical configuration

Table 3. Jumper states

Jumper state Description

Both CN3 jumpers ON ST-LINK/V2 functions enabled for on board programming (default)

Both CN3 jumpers OFF ST-LINK/V2 functions enabled for application through external

CN2 connector (SWD supported)

MS31115V1

Hardware requirements:- USB cable type A to mini-B- Computer with Windows XP, Vista or 7

Development toolchains:- Altium TASKING VX-Toolset- Atollic TrueSTUDIO- IAR EWARM- Keil MDK-ARM


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4.2.1 Using ST-LINK/V2 to program/debug the STM32F401 on board

To program the STM32F401 on board, simply plug in the two jumpers on CN3, as shown in Figure 7 in red, but do not use the CN2 connector as that could disturb communication with the STM32F401VCT6 of the STM32F401 Discovery board.

Figure 7. STM32F401 Discovery board connections image

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4.2.2 Using ST-LINK/V2 to program/debug an external STM32 application

It is very easy to use the ST-LINK/V2 to program the STM32 on an external application. Simply remove the 2 jumpers from CN3 as shown in Figure 8, and connect your application to the CN2 debug connector according to Table 4.

Note: SB13 must be OFF if you use CN2 pin 5 in your external application.

Figure 8. ST-Link connections image

Table 4. Debug connector CN2 (SWD)

Pin CN2 Designation

1 VDD_TARGET VDD from application

2 SWCLK SWD clock

3 GND Ground

4 SWDIO SWD data input/output

5 NRST RESET of target MCU

6 SWO Reserved


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4.3 Power supply and power selection

The power supply is provided either by the host PC through the USB cable, or by an external 5 V power supply.

The D1 and D2 diodes protect the 5 V and 3 V pins from external power supplies:

• 5 V and 3 V can be used as output power supplies when another application board is connected to pins P1 and P2.In this case, the 5 V and 3 V pins deliver a 5 V or 3 V power supply and the power consumption must be lower than 100 mA.

• 5 V can also be used as input power supplies, e.g. when the USB connector is not connected to the PC.In this case, the STM32F401 Discovery board must be powered by a power supply unit or by an auxiliary equipment complying with standard EN-60950-1: 2006+A11/2009, and must be Safety Extra Low Voltage (SELV) with limited power capability.

4.4 LEDs

• LD1 COM: LD1 default status is red. LD1 turns to green to indicate that communications are in progress between the PC and the ST-LINK/V2.

• LD2 PWR: The red LED indicates that the board is powered.

• User LD3: The orange LED is a user LED connected to the I/O PD13 of the STM32F401VCT6.

• User LD4: The green LED is a user LED connected to the I/O PD12 of the STM32F401VCT6.

• User LD5: The red LED is a user LED connected to the I/O PD14 of the STM32F401VCT6.

• User LD6: The blue LED is a user LED connected to the I/O PD15 of the STM32F401VCT6.

• USB LD7: The green LED indicates when VBUS is present on CN5 and is connected to PA9 of the STM32F401VCT6.

• USB LD8: The red LED indicates an overcurrent from VBUS of CN5 and is connected to the I/O PD5 of the STM32F401VCT6.

4.5 Pushbuttons

• B1 USER: User and Wake-Up button connected to the I/O PA0 of the STM32F401VCT6.

• B2 RESET: The pushbutton connected to NRST is used to RESET the STM32F401VCT6.

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4.6 On board audio capability

The STM32F401 uses an audio DAC (CS43L22) to output sounds through the audio mini jack connector.

The STM32F401 controls the audio DAC through the I2C interface and processes digital signals through an I2S connection or analog input signal.

• The sound can come independently from different inputs:

– ST MEMS microphone (MP45DT02): digital using PDM protocol or analog when using the low pass filter.

– USB connector: from external mass storage such as a USB key, USB HDD, and so on.

– Internal memory of the STM32F401.

• The sound can be output in different ways through audio DAC:

– Using the I2S protocol

– Using the microphone output directly via a low pass filter to analog input AIN4x of the CS43L22

4.7 USB OTG supported

The STM32F401 is used to drive only USB OTG full speed on this board. The USB micro-AB connector (CN5) allows the user to connect a host or device component, such as a USB key, mouse, and so on.

Two LEDs are dedicated to this module:

• LD7 (green LED) indicates when VBUS is active

• LD8 (red LED) indicates an overcurrent from a connected device.

4.8 E-compass MEMS (ST MEMS LSM303DLHC)

The LSM303DLHC is an ultra-compact low-power system-in-package featuring a 3D digital linear acceleration sensor and a 3D digital magnetic sensor. It includes a sensing element and an IC interface able to provide the measured acceleration to the external world through an I2C serial interface.

The LSM303DLHC has dynamically user-selectable full scales of ± 2g/± 8g and is capable of measuring the acceleration, and a magnetic field full scale from ±1.3 g to 8.1 g with an output data rate of 100 Hz or 400 Hz.

The STM32F401VCT6 MCU controls this motion sensor through the I2C interface.

4.9 Gyroscope MEMS (ST MEMS L3GD20)

The L3GD20 is an ultra-compact, low-power, three-axis angular rate sensor. It includes a sensing element and an IC interface able to provide the measured angular rate to the external world through the I2C/SPI serial interface.

The L3GD20 has dynamically user-selectable full scales of ± 250 dps/500 dps/±2000 dps and is capable of measuring rates.


20/39 DocID025174 Rev 1

The STM32F401VCT6 MCU controls this motion sensor through the SPI interface.

4.10 JP2 (Idd)

Jumper JP2, labeled Idd, allows the consumption of STM32F401VCT6 to be measured by removing the jumper and connecting an ammeter.

• Jumper on: STM32F401VCT6 is powered (default).

• Jumper off: an ammeter must be connected to measure the STM32F401VCT6 current, (if there is no ammeter, the STM32F401VCT6 is not powered).

4.11 OSC clock

4.11.1 OSC clock supply

If PH0 and PH1 are only used as GPIOs instead of as a clock, then SB14 and SB16 are closed and R24, R25 and R66 are removed.

MCO from ST-LINK (from MCO of the STM32F103)This frequency cannot be changed, it is fixed at 8 MHz and connected to PH0-OSC_IN of the STM32F401VCT6. The configuration needed is:

– SB14, SB16 OPEN

– R25 removed

– R66 soldered

Oscillator onboard (from X2 crystal)For typical frequencies and its capacitors and resistors, please refer to the STM32F401VCT6 Datasheet. The configuration needed is:

– SB14, SB16 OPEN

– R25 soldered

– R66 removed

Oscillator from external PH0 (from external oscillator through pin 7 of the P2 connector)The configuration needed is:

– SB14 closed

– SB16 closed

– R25 and R66 removed

4.11.2 OSC 32 KHz clock supply

If PC14 and PC15 are only used as GPIOs instead of as a clock, then SB17 and SB18 are closed, and R21 and R22 are removed.

Oscillator onboard (from X1 Crystal (not provided))The configuration needed is:

– SB17, SB18 OPEN

– C20, C28, R21 and R22 soldered

DocID025174 Rev 1 21/39


37

Oscillator from external PC14 (from external oscillator trough the pin 9 of P2 connector)The configuration needed is:

– SB17closed

– SB18 closed

– R21 and R22 removed

4.12 Solder bridges

Table 5. Solder bridges

Bridge State (1) Description

SB14,16 (X2 crystal)

OFF X2, C18, C19, R24 and R25 provide a clock. PH0, PH1 are disconnected from P2

ON PH0, PH1 are connected to P2 R24, R25 and R66 must not be fitted).

SB3,5,7,9 (Default) ON Reserved, do not modify

SB2,4,6,8 (Reserved) OFF Reserved, do not modify

SB17,18 (X3 crystal) OFF

X3, C20, C28, R21 and R22 deliver a 32 KHz clock. PC14, PC15 are not connected to P2.

ON PC14, PC15 are only connected to P2. Remove only R21, R22

SB1 (B2-RESET) ON B2 pushbutton is connected to the NRST pin of the STM32F401VCT6 MCU

OFF B2 pushbutton is not connected to the NRST pin of the STM32F401VCT6 MCU

SB21 (B1-USER) ON B1 pushbutton is connected to PA0

OFF B1 pushbutton is not connected to PA0

SB13 (NRST)

ON NRST signal of the CN2 connector is connected to the NRST pin of the STM32F401VCT6 MCU

OFF NRST signal of the CN2 connector is not connected to the NRST pin of the STM32F401VCT6 MCU

SB15 (SWO) ON SWO signal of the CN2 connector is connected to PB3

OFF SWO signal is not connected

SB10,11 (RX,TX)OFF Reserved, do not modify

ON Reserved, do not modify

SB12 (STM_RST) OFF No incidence on STM32F103C8T6 (ST-LINK/V2) NRST signal

ON STM32F103C8T6 (ST-LINK/V2) NRST signal is connected to GND

SB19 (BOOT0)

ON BOOT0 signal of the STM32F401VCT6 MCU is held low through a 510 Ω pull-down resistor

OFF BOOT0 signal of the STM32F401VCT6 MCU is held high through a 10 KΩ pull-up resistor

SB20 (BOOT1)

OFF The BOOT1 signal of the STM32F401VCT6 MCU is held high through a 10 KΩ pull-up resistor

ON The BOOT1 signal of the STM32F401VCT6 MCU is held low through a 510 Ω pull-down resistor


22/39 DocID025174 Rev 1

4.13 Extension connectors

The male headers P1 and P2 can connect the STM32F401 Discovery board to a standard prototyping/wrapping board. STM32F401VCT6 GPI/Os are available on these connectors. P1 and P2 can also be probed by an oscilloscope, logical analyzer or voltmeter.

1. Default SBx state is shown in bold.

Table 6. MCU pin description versus board function (page 1 of 8)

MCU pin Board function

Main function

Alternatefunctions

LQ

FP

100

CS

43L

22

MP

45D

T02

L3G

D20

LS

M30

3DL

HC

Pu

shb

utt

on

LE

D

SW

D

US

B

OS

C

Fre

e I/O

Po

wer

su

pp

ly

CN

5

CN

2

P1

P2

BOOT0 94 21

NRST 14

RE

SE

T

NR

ST

5 6

PA0-WKUP

TIM2_CH1/TIM2_ETR, TIM5_CH1,

USART2_CTS, ADC1_0, WKUP

23

US

ER

12

PA1TIM2_CH2, TIM5_CH2,

USART2_RTS, ADC1_1

24 11


TIM9_CH1, USART2_TX, ADC1_2

25 14


TIM9_CH2, USART2_RX, ADC1_3

26 13

PA4SPI1_NSS,

SPI3_NSS/I2S3_WS, USART2_CK, ADC1_4

29

LRC

K/A

IN1

x

16

PA5TIM2_CH1/TIM2_ETR, SPI1_SCK, ADC1_5

30

SC

L/S

PC

15

PA6TIM1_BKIN, TIM3_CH1,

SPI1_MISO, ADC1_631

SD

O 18

DocID025174 Rev 1 23/39


37

PA7TIM1_CH1N, TIM3_CH2,

SPI1_MOSI, ADC1_732

SD

A/S

DI/S

DO

17

PA8

MCO_1, TIM1_CH1, I2C3_SCL,

USART1_CK, USB_FS_SOF

67 43

PA9

TIM1_CH2, I2C3_SMBAL, USART1_TX,

USB_FS_VBUS

68

GR

EE

N

VB

US

1 44

PA10TIM1_CH3,

USART1_RX, USB_FS_ID

69 ID 4 41

PA11

TIM1_CH4, USART1_CTS, USART6_TX, USB_FS_DM

70

DM 2

PA12

TIM1_ETR, USART1_RTS, USART6_RX, USB_FS_DP

71

DP 3

PA13 JTMS-SWDIO 72

SW

DIO

4 42

PA14JTCK-SWCLK, I2S3ext_WS

76

SW

CLK 2 39

PA15

JTDI, TIM2_CH1/TIM2_ETR,

SPI1_NSS, SPI3_NSS/I2S3_WS

77 40

PB0TIM1_CH2N,

TIM3_CH3, ADC1_835 22



Main function

Alternatefunctions

LQ

FP

100

CS

43L

22

MP

45D

T02

L3G

D20

LS

M30

3D

LH

C

Pu

shb

utt

on

LE

D

SW

D

US

B

OS

C

Fre

e I/O

Po

wer

su

pp

ly

CN

5

CN

2

P1

P2


24/39 DocID025174 Rev 1

PB1TIM1_CH3N,

TIM3_CH4, ADC1_936 21

PB2 37 24

PB3

JTDO-SWO, TIM2_CH2, SPI1_SCK, SPI3_SCK/I2S3_CK,

I2C2_SDA

89

SW

O 6 28

PB4

JTRST, TIM3_CH1, SPI1_MISO, SPI3_MISO,

I2S3ext_SD, I2C3_SDA

90 25

PB5

TIM3_CH2, I2C1_SMBAL, SPI1_MOSI,

SPI3_MOSI/I2S3_SD

91 26

PB6TIM4_CH1, I2C1_SCL,

USART1_TX, USB_FS_INT

92

SC

L

SC

L 23

PB7TIM4_CH2, I2C1_SDA,

USART1_RX93 24

PB8

TIM4_CH3, TIM10_CH1, I2C1_SCL,

USB_FS_SCL, SDIO_D4

95 19

PB9

TIM4_CH4, TIM11_CH1, I2C1_SDA,

SPI2_NSS/I2S2_WS, USB_FS_SDA,

SDIO_D5

96

SD

A

SD

A 20

PB10TIM2_CH3, I2C2_SCL,

SPI2_SCK/I2S2_CK47

CLK 34

VCAP1 48

VD

D

35



Main function

Alternatefunctions

LQ

FP

100

CS

43L

22

MP

45D

T02

L3G

D20

LS

M30

3D

LH

C

Pu

shb

utt

on

LE

D

SW

D

US

B

OS

C

Fre

e I/O

Po

wer

su

pp

ly

CN

5

CN

2

P1

P2

DocID025174 Rev 1 25/39


37

PB12

TIM1_BKIN, I2C2_SMBAL,

SPI2_NSS/I2S2_WS, I2S2ext_WS

51 36

PB13TIM1_CH1N,

SPI2_SCK/I2S2_CK, I2S2ext_CK

52 37

PB14TIM1_CH2N, SPI2_MISO, I2S2ext_SD

53 38

PB15

RTC_50Hz, TIM1_CH3N,

SPI2_MOSI/I2S2_SD, I2S2ext_MISO

54 39

PC0 ADC1_10 15

Po

wer

On

8

PC1 ADC1_11 16 7

PC2SPI2_MISO,

I2S2ext_SD, ADC1_1217 10

PC3SPI2_MOSI/I2S2_SD,

ADC1_1318

AIN

4x

PD

M_O

UT

9

PC4 ADC1_14 33 20

PC5 ADC1_15 34 19

PC6TIM3_CH1, I2S2_MCK, USART6_TX, SDIO_D6

63 47

PC7TIM3_CH2, I2S3_MCK, USART6_RX, SDIO_D7

64

MC

LK 48

PC8MCO_CPUCK,

TIM3_CH3, USART6_CK, SDIO_D0

65 45



Main function

Alternatefunctions

LQ

FP

100

CS

43L

22

MP

45D

T02

L3G

D20

LS

M30

3D

LH

C

Pu

shb

utt

on

LE

D

SW

D

US

B

OS

C

Fre

e I/O

Po

wer

su

pp

ly

CN

5

CN

2

P1

P2


26/39 DocID025174 Rev 1

PC9MCO_2, TIM3_CH4,

I2C3_SDA, I2S2_CKIN, SDIO_D1

66 46

PC10I2S3ext_CK,

SPI3_SCK/I2S3_CK, SDIO_D2

78

SC

LK 37

PC11I2S3ext_SD,

SPI3_MISO, SDIO_D379 38

PC12I2S3ext_MISO,

SPI3_MOSI/I2S3_SD, SDIO_CK

80

SD

IN 35

PC13 TAMP_1 7 12

PC14 OSC32_IN 8

OS

C32

_IN

9

PC15 OSC32_OUT 9

OS

C32

_OU

T

10

PD0 81 36

PD1 82 33

PD2 TIM3_ETR, SDIO_CMD 83 34

PD3SPI2_SCK/I2S2_CK,

USART2_CTS84 31

PD4 USART2_RTS 85

RE

SE

T

32

PD5 USART2_TX 86

RE

D

Ove

rCur

rent

29

PD6SPI3_MOSI/I2S3_SD,

USART2_RX87 30



Main function

Alternatefunctions

LQ

FP

100

CS

43L

22

MP

45D

T02

L3G

D20

LS

M30

3D

LH

C

Pu

shb

utt

on

LE

D

SW

D

US

B

OS

C

Fre

e I/O

Po

wer

su

pp

ly

CN

5

CN

2

P1

P2

DocID025174 Rev 1 27/39


37

PD7 USART2_CK 88 27

PD8 55 40

PD9 56 41

PD10 57 42

PD11 58 43

PD12TIM4_CH1

59

GR

EE

N

44

PD13 TIM4_CH2 60

OR

AN

GE

45

PD14 TIM4_CH3 61

RE

D 46

PD15 TIM4_CH4 62

BLU

E

47

PE0 TIM4_ETR 97

INT

1 17

PE1 98

INT

2 18

PE2 TRACECLK, SPI4_SCK 1

DR

DY

15

PE3 TRACED0 2

CS

_I2C

/SP

I

16

PE4 TRACED1, SPI4_NSS 3

INT

1

13

PE5TRACED2, TIM9_CH1,

SPI4_MISO4

INT

2 14

PE6TRACED3, TIM9_CH2,

SPI4_MOSI5 11

PE7 TIM1_ETR 38 25



Main function

Alternatefunctions

LQ

FP

100

CS

43L

22

MP

45D

T02

L3G

D20

LS

M30

3D

LH

C

Pu

shb

utt

on

LE

D

SW

D

US

B

OS

C

Fre

e I/O

Po

wer

su

pp

ly

CN

5

CN

2

P1

P2


28/39 DocID025174 Rev 1

PE8 TIM1_CH1N 39 26

PE9 TIM1_CH1 40 27

PE10 TIM1_CH2N 41 28

PE11 TIM1_CH2, SPI4_NSS 42 29

PE12TIM1_CH3N, SPI4_SCK

43 30

PE13 TIM1_CH3, SPI4_MISO 44 31

PE14 TIM1_CH4, SPI4_MOSI 45 32

PE15 TIM1_BKIN 46 33

PH0 OSC_IN 12

OS

C_I

N

7

PH1 OSC_OUT 13

OS

C_

OU

T

8

5 V 3

5 V 4

3 V 5

3 V 6

VD

D

3 22

VD

D

4

GN

D

GN

D

GN

D

5 3 1 1

GN

D

2 2

GN

D

5

GN

D

23



Main function

Alternatefunctions

LQ

FP

100

CS

43L

22

MP

45D

T02

L3G

D20

LS

M30

3D

LH

C

Pu

shb

utt

on

LE

D

SW

D

US

B

OS

C

Fre

e I/O

Po

wer

su

pp

ly

CN

5

CN

2

P1

P2

DocID025174 Rev 1 29/39


37

GN

D

49 49

GN

D

50 50



Main function

Alternatefunctions

LQ

FP

100

CS

43L

22

MP

45D

T02

L3G

D20

LS

M30

3D

LH

C

Pu

shb

utt

on

LE

D

SW

D

US

B

OS

C

Fre

e I/O

Po

wer

su

pp

ly

CN

5

CN

2

P1

P2

Mechanical drawing UM1669

30/39 DocID025174 Rev 1

5 Mechanical drawing

Figure 9. STM32F401 Discovery board mechanical drawing

DocID025174 Rev 1 31/39

UM1669 Electrical schematics

37

6 Electrical schematics

Figure 10. STM32F401 Discovery board

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet

B.1

(PC

B.S

CH

)Date:

8/12

/201

3MB11

151

STM32

F401

C-D

ISCOVE

RY

PA13

PA14

NRST PB3

MCO

PA3

PA2

U_S

T_LINK

ST_L

INK_V

2.SC

HDOC

PA13

PA14

BOOT0

NRST

VDDTCK/SWCLK

TMS/SW

DIO

MCO

NRST

PB3

T_SW

OT_

NRST

12

34

56

78

910

1112

1314

1516

1718

1920

2122

2324

2526

2728

2930

3132

3334

3536

3738

3940

4142

4344

4546

4748

4950

P1 Header 2

5X2

12

34

56

78

910

1112

1314

1516

1718

1920

2122

2324

2526

2728

2930

3132

3334

3536

3738

3940

4142

4344

4546

4748

4950

P2 Header 2

5X2

PA4

PC12

PC10

PD4

PC7

PC3

PB10

PC4

PB6

PB9

U_A

udio

Aud

io.SchDoc

PA0

NRST PE0

PE1

PE3

PA5

PA7

PA6

PE4

PE5

PE2

PB6

PB9

PD12

PD13

PD14

PD15

U_IO Peripherals

IO Peripherals.SchDoc

PD2

BOOT0

PH1

PH0

NRSTPE0

PE1

PE2

PE3

PE4

PE5

PE6

PE7

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PE15

PD0

PD1

PD3

PD4

PD5

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PD15

MCO

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB12

PB13

PB14

PB15

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PA0

PB0

PC0

PC14

PC15

U_S

TM32Fx

STM32

Fx.SchDoc

PC0

PD5

PA9

PA10

PA11

PA12

U_U

SB_O

TG_F

SUSB

_OTG

_FS.Sc

hDoc

MCO

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB12

PB13

PB14

PB15

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PC14

PC15

PH0

PH1

BOOT0

NRST

PE0

PE1

PE2

PE3

PE4

PE5

PE6

PE7

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PE15

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PD15

PD5

PC0

PA10

PA11

PA12

PA4

PC12

PC10

PD4

PC7

PB6

PB9

PB10

PC3

PA0

NRST

PD12

PA5

PE3

PE0

PE1

PE1

PE2

PE3

PE4

PE5

PE6

PE7

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PE15

PE0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA13

PA14

PA15

PA0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB12

PB13

PB14

PB15

PB0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC14

PC15

PC0

PD1

PD2

PD3

PD4

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PD15

PD0

PH1

PH0

VDD

PC4

PD13

PD14

PD15

VDD

BOOT1

/ PB

2

PA10

PD5

PC13

PA9

PA6

PA7

NC

3V5V

5V 3V5V 3V

3V5V

Rev A.0 --> PC

B label M

B11

15 A-00

Rev B.1 --> PC

B label M

B11

15 B-01 LD

3GD20

U7 was ro

uted wrong.

PE4

PB6

PE2

PE5

PB9

NC

PA3

PA2

TM32

F4_U

SART2

_TX

TM32

F4_U

SART2

_RX

Electrical schematics UM1669

32/39 DocID025174 Rev 1

Figure 11. ST-LINK/V2 (SWD only)

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fB

.1(P

CB

.SC

H)

Date:

8/12

/201

3

3V

USB

_DM

USB

_DP

STM

_RS

T

T_JTCKT_

JTC

K

T_JTDOT_JTDI

T_JT

MS

STM

_JTM

S

STM_JTCK

OSC

_IN

OSC

_OU

T

T_NRST

R20

4K7

R19

4K7

AIN

_1

R18

100K

R5

100K

3V

3V

3V

SWIM_IN

SWIM_IN

SWIM_IN

SWIM

SWIM

SWIM_RST_INSWIM_RST

MB11

152

6

STM32

F401

C-D

ISCOVE

RY ST

-LINK/V2 (SWD only)

USB

_DM

USB

_DP

3VR7

1K5

USB

R6

100K

VCC

1

D-

2

D+

3

ID4

GND

5

SHEL

L6

CN1

USB

-MIN

I-typeB

U5V

COM

5VU5V

3V

R13

1K

PWR

5V

JP4

Wired on So

lder Side

JP3

3V

Jumper

s ON --> D

ISCOVERY S

elec

ted

Jumper

s OFF

-->

ST-L

INK S

elec

ted

VBAT

1

PA7 17

PC13

2

PA12

33PC

143

PB0 18

PC15

4JTMS/SW

DIO

34

OSC

IN5

PB1 19

OSC

OUT

6

VSS

_235

NRST

7

PB2/BOOT1 20

VSS

A8

VDD_2

36

VDDA

9

PB10 21

PA0

10

JTCK/SWCLK37

PA1

11

PB11 22

PA2

12

PA15/JTDI38

PA3 13

VSS_1 23

PA4 14

PB3/JTDO39

PA5 15

VDD_1 24

PA6 16

PB4/JNTRST40

PB12

25

PB541

PB13

26

PB642

PB14

27

PB743

PB15

28

BOOT044

PA8

29

PB845

PA9

30

PB946

PA10

31

VSS_347

PA11

32

VDD_348

U2

STM32

F103

C8T

6

Boa

rd Id

ent:

PC

13=0

T_JT

CK

T_JT

MS

SWD

3V

1234

CN3

SB3

SB2

SB5

SB4

SB7

SB6

SB9

SB8

STM

_JTM

S

STM

_JTC

KSW

CLK

SWDIO

SWD

RESERVED

DEFAULT

3V

T_S

WD

IO_I

N

T_S

WO

LED

_STL

INK

LED

_STL

INK

3V

R4

100

R3

100

Red

_Green

21

34

LD1

LD_B

ICOLO

R_C

MS

R10

22

R15

22

R12

10K

PA13

PA14

TCK/SWCLK

TMS/SW

DIO

VDD

3V

R14

10K

Not Fitted

MC

OMCO

T_JRST

R67

100

1 2 3 4 5 6

CN2

Header 6

AIN

_1

T_N

RST

T_S

WO

NRST

PB3

R16

22R17

22

SB13

SB15

T_N

RST

T_S

WO

SB12

RC M

ust b

e very close to

STM

32F103 pin 29

2V5

51

2

GND

3

4

BYPA

SSIN

H

Vin

Vou

t

U3

LD39

85M25

R

JP2

51

2

GND

3

4

BYPA

SSIN

H

Vin

Vou

t

U1

LD39

85M33

R

D1

BAT6

0JFILM

D3

BAT6

0JFILM

D2

BAT6

0JFILM

R66

100

Idd

5V

EXT_

5V, Inp

ut or O

utpu

t

OUT_

3V, O

nly Outpu

t

JP1

TX RX

SB11

SB10

PA3

PA2

STM32

F4_U

SART2

_TX

STM32

F4_U

SART2

_RX

Close to

JP

Not Fitted

STLINK_TX

STLINK_R

X

Not Fitted

LD2

LED, red

C7

100n

FC8

100n

FC12

100n

FC10

100n

F

C17

1uF

C14

1uF

C15

100n

FC16

100n

FC13

10nF

C1

1uF

C4

1uF

C3

100n

FC2

100n

FC5

10nF

C6

20pF

C9

20pF

C11

100n

FC67

20pF

12

X1

8MHzR11

[NA]

R2

[NA]

R1

0

R9

0R8

0

DocID025174 Rev 1 33/39


37

Figure 12. STM32F401VCT6 MCU

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fB

.1(P

CB

.SC

H)

Date:

8/12

/201

3

R24

220

MB11

153

6

STM32

F401

C-D

ISCOVE

RY MCU

PB5

PB6

PB7

PA4

PA5

PA6

PA7

VDD

PA11

PA12

PA9

PA10

PB12

PB13

PB14

PB15

PB10

PB8

PA0

PB9

PA1

PB1

PB2

PA15

PB3

PB0

PA3

PA13

PA14

PB4

PA2

PA8

BOOT0

MCO

PH1-OSC

_OUT

PA0

NRST

PB0

R28

510

PC15

PC14

BOOT0

PH1

PH0

Must b

e close to th

e Crystal

R30

10K

VDD

PB2

BOOT1

SB20

SB19

SB16

SB14

R31

510

NRST

MCO

Not Fitted

VDD

R23

47

PC0

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PE0

PE0

PE1

PE1

PE2

PE2

PE3

PE4

PE5

PE6

PE7

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PE15

PE3

PE4

PE5

PE6

PE7

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PE15

PD0

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PD15

PD1

PD2

PD3

PD4

PD5

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PD15

PC14

-OSC

32_IN

PC15

-OSC

32_O

UT

SB17

SB18

PH0-OSC

_IN

R32

4.7K

VDD

R27

4.7K

PB6

PB9

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB12

PB13

PB14

PB15

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PE2

1

PE3

2

PE4

3

PE5

4

PE6

5

PC13

7

PC14

8

PC15

9

PH0

12

PH1

13

NRST

14

PC0

15

PC1

16

PC2

17

PC3

18

PA0

23

PA1

24

PA2

25

PA3

26

PA4

29

PA5

30

PA6

31

PA7

32

PC4

33

PC5

34

PB0

35

PB1

36

PB2

37

PE7

38

PE8

39

PE9

40

PE10

41

PE11

42

PE12

43

PE13

44

PE14

45

PE15

46

PB10

47

PB12

51

PB13

52

PB14

53

PB15

54

PD8

55

PD9

56

PD10

57

PD11

58

PD12

59

PD13

60

PD14

61

PD15

62

PC6

63

PC7

64

PC8

65

PC9

66

PA8

67

PA9

68

PA10

69

PA11

70

PA12

71

PA13

72

PA14

76

PA15

77

PC10

78

PC11

79

PC12

80

PD0

81

PD1

82

PD2

83

PD3

84

PD4

85

PD5

86

PD6

87

PD7

88

PB3

89

PB4

90

PB5

91

PB6

92

PB7

93

BOOT0

94

PB8

95

PB9

96

PE0

97

PE1

98

VSS

99

U4A

STM32

F401

VCT6

U

VBAT

6

VSS

427

VSS

274

VSS

A20

VREF

+21

VDDA

22

VSS

510

VCAP2

73

VDD3

100

VSS

49

VDD2

75VDD1

50VDD4

28VDD12

19VDD5

11

VCAP1

48

U4B

STM32

F401

VCT6

U

12

X2

8MHz

C19

20pF

C18

20pF

4 1

3 2

X3

XTA

L_32

K_2

0PPM

C20

6.8p

F

C28

6.8p

F

C38

2.2u

FC33

2.2u

FC27

1uF

C21

100n

F

C23

100n

F

C26

100n

FC35

100n

FC25

100n

FC32

100n

FC34

100n

FC29

100n

F

C24

1uF

C22

1uF

L1 Ferrite

C30

100n

FC31

100n

F

R29

[NA]

R25

0

R22

0 R21

0

R26

0


34/39 DocID025174 Rev 1

Figure 13. Audio

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fB

.1(P

CB

.SC

H)

Date:

8/12

/201

3MB11

154

6

STM32

F401

C-D

ISCOVE

RY Aud

io

PA4

PC12

PC10

R43

10K

PB6

PB9

R59

51

PD4

PC7

3V

I2C add

ress 0x9

4

2V5

3V

R60

51

Aud

io_R

ST

R45

100

Aud

io_S

DA

Aud

io_S

CL

I2S3

_MCK

I2S3

_WS

I2S3

_SCK

I2S3

_SD

Aud

io_D

AC_O

UT

PDM_O

UT

R51

100

R50

100KR44

100K

R52

1.2K

3V

CLK

_IN

PDM_O

UT

3V

132CN4

ST-225

-02

PC3

PA4

PC3

PB10

PC3

PB10PB

6PB

9

PC7

PC10

PC12

PA4

PD4

PC4

PC4

SDA

1

SCL

2

A0

3

SPKR_O

UTA

+4

VP

5

SPKR_O

UTA

-6

SPKR_O

UTB

+7

VP

8SP

KR_O

UTB

-9

-VHPF

ILT

10

FLYN

11

FLYP

12

+VHP

13

HP/LINE_

OUTB

14HP/LINE_

OUTA

15

VA

16

AGND

17FILT

+18

VQ

19TS

TO20

AIN

4A21

AIN

4B22

AIN

3A23

AIN

3B24

AIN

2A25

AIN

2B26

AFILT

A27

AFILT

B28

AIN

1A29

AIN

1B30

SPKR/H

P31

RES

ET32

VL

33

VD

34

DGND

35

TSTO

36

MCLK

37

SCLK

38

SDIN

39

LRCK

40

GND/Therm

al Pad

41

U8

CS4

3L22

GND

1

GND

3LR

2

CLK

4

VDD

6

DOUT

5

U10

MP4

5DT0

2

C47

1uF

C57

1uF

C63

1uF

C62

1uF

C49

100n

FC50

100n

F

C44

100n

FC45

100n

FC59

100n

F

C66

100n

F

C46

100n

F

C60

22nF

C58

10nF

C61

22nF

C51

150p

FC53

150p

F

C52

1uF

C56

1uF

C65

10uF

C64

1uF

R62

[NA]

R46

[NA]

R47

[NA]

R63

0

R53

0

R61

0

DocID025174 Rev 1 35/39


37

Figure 14. USB_OTG_FS

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fB

.1(P

CB

.SC

H)

Date:

8/12

/201

3MB11

155

6

STM32

F401

C-D

ISCOVE

RY USB

_OTG

_FS

5V

R41

10K

PC0

PD5

R49

47K

3V

R65

620

PA11

PA12

PA10

OTG

_FS_

PowerSw

itchO

n

OTG

_FS_

OverC

urrent

VBUS_

FS

OTG

_FS_

ID

OTG

_FS_

DM

OTG

_FS_

DP

R56

22R58

22

R64

330

R54

47K

3V

3V

Dz

A2

IDA3

Pd1

B1

Pup

B2

Vbu

sB3

D+in

C1

Pd2

C2

D+o

utC3

D-in

D1

GND

D2

D-out

D3

U9

EMIF02

-USB

03F2

GND

2

IN5

EN4

OUT

1FA

ULT

3U6

STMPS

2141

STR

PA9

PA10

PA11

PA12

PC0

PD5

PA9

3

1

2

T1 9013

-SOT2

3VBUS

1

DM

2

DP

3

ID4

GND

5

Shield

6

USB_Micro-AB receptacle

CN5

USB

-MIC

RO-A

B

C54

4.7u

F

LD7

LED, green

LD8

LED, red

R55

[NA]

R42

0

R57

0

R48

0


36/39 DocID025174 Rev 1

Figure 15. Peripherals

STMicroelec

tron

ics

Title

:

Num

ber:

Rev:

Sheet o

fB

.1(P

CB

.SC

H)

Date:

8/12

/201

3

R38

330

R36

1K R39

1K R40

510

PD12

MB11

156

6

STM32

F401

C-D

ISCOVE

RY Pe

riphe

rals

LEDs

R35

220K

VDD

SB21

PA0

R34

330

R37

100

USE

R &

WAKE-

UP Button

NRST

NRST

RES

ET B

utton

VDD

SB1

PA0

PD12

PD13

PD14

PD15

PD13

PD14

PD15

MEM

S

PA5

PA7

PE0

3V

SPI1_M

OSI

SPI1_S

CK

PA5

PA7

PE0

PE1

MEM

S_IN

T1MEM

S_IN

T2PE

1

PA6

PE3

PE3

PA6

SPI1_M

ISO

CS_

I2C/SPI

VDD_IO

1

GND

13C1

14

GND

8GND

9

VDD

16

CS_

I2C/SPI

5

INT1

7DRDY/IN

T26

GND

10GND

11

SA0/SD

O4

SDA/SDI/S

DO

3SC

L/SP

C2

VDD

15

GND

12

U7

L3GD20

VDD_IO

1

SETP

12

DRDY

9GND

10GND

11

VDD

14

C1

6IN

T15

INT2

4

GND

7NC

8

SETC

13

SDA

3SC

L2

U5

LSM30

3DLH

C

3V

PB6

PB6

PB9

PB9

PE2

PE4

PE5

PE4

PE5

PE2

U D

LR

LD4

LED, green

LD3

LED, o

range

LD5

LED, red

LD6

LED, b

lue

1 234

B2SW-PUSH-CMS_BLACK

1 234

B1SW-PUSH-CMS_BLUE

C37

10uF

C43

10uF

C40

100n

F

C55

100n

F

C42

4.7u

F

C41

220n

F

C48

10nF

C39

100n

F

R33

[NA]

C36

[NA]

DocID025174 Rev 1 37/39

UM1669 Revision history

37

7 Revision history

Table 7. Document revision history

Date Revision Changes

10-Sep-2013 1 Initial release.

UM1669

38/39 DocID025174 Rev 1

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