UM2032
User manual
Discovery kit with STM32F412ZG MCU
Introduction
The 32F412GDISCOVERY Discovery kit is a complete demonstration and development
platform for STMicroelectronics Arm® Cortex®-M4 core-based STM32F412ZGT6
microcontroller. This microcontroller features four I2C buses, four USART ports, five SPI
ports with two multiplexed full-duplex I2S buses, SDIO interface, USB OTG full-speed 2.0
port, two CAN buses, FMC parallel interface, two digital filters for sigma-delta modulators,
PDM interface for two digital microphones, one 12-bit ADC, dual Quad-SPI interface, JTAG
and SWD debugging support. This Discovery kit offers everything required for users to get
started quickly and develop applications easily.
A full range of hardware features on the board helps users to evaluate on-board peripherals
such as: USB OTG FS, microSD™ card, full-duplex I2S with an audio codec and stereo jack
for headset including analog microphone, DFSDM with a pair of ST-MEMS digital
microphones on board, Quad-SPI Flash memory device, 1.54" TFT LCD using FMC
interface with capacitive touch panel.
The ARDUINO® Uno V3 compatible connectors expand the functionality with a wide choice
of specialized shields. The extension connectors allow easy connection of a daughterboard
for specific customer applications. The integrated ST-LINK/V2-1 provides an embedded
in-circuit debugger and programmer for the STM32.
Figure 1. 32F412GDISCOVERY (top view)
Figure 2. 32F412GDISCOVERY (bottom view)
Pictures are not contractual.
October 2021
UM2032 Rev 3
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www.st.com
1
Contents
UM2032
Contents
1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
3
Codification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Development environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1
System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2
Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1
32F412GDISCOVERY Discovery kit mechanical drawing . . . . . . . . . . . . 13
5.2
Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.3
5.4
2/40
5.2.1
Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2.2
ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3.1
Power supply sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3.2
STM32 power supply options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.3
Modification of STM32 voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.4
Supplying the 32F412GDISCOVERY through
the ST-LINK/V2-1 USB port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.5
Programming/debugging when the power supply
is not from ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3.6
Measurement of current IDD drawn by the microcontroller . . . . . . . . . . 17
Clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.1
HSE clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.2
LSE clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.5
Reserved use of solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.6
Reset source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.7
Boot options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.8
Audio codec . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.8.1
Stereo headset and headphone jack . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.8.2
Loudspeaker output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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Contents
5.9
Digital microphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.10
USB OTG FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7
32F412GDISCOVERY is USB device . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.10.2
32F412GDISCOVERY is USB host . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.11
microSD™ card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.12
I2C extension connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.13
Quad-SPI NOR Flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.14
Virtual COM port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.15
ARDUINO® Uno V3 connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.16
Extension connectors P1 and P2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.17
LCD display, backlight and touch panel . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.18
6
5.10.1
5.17.1
LCD display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.17.2
LCD signal access (CN7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.17.3
Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.17.4
Touch panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Joystick and LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.1
I2C extension connector CN10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.2
USB OTG FS Micro-AB connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.3
microSD™ connector CN13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.4
ST-LINK/V2-1 USB Micro-B connector CN6 . . . . . . . . . . . . . . . . . . . . . . 33
32F412GDISCOVERY Discovery kit information . . . . . . . . . . . . . . . . . 35
7.1
Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.2
32F412GDISCOVERY product history . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.3
7.4
7.2.1
Product identification 32F412GDISCO/ . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.2.2
Product identification DK32F412G$AU1 . . . . . . . . . . . . . . . . . . . . . . . . 36
Board revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.3.1
MB1209 revision D-02 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.3.2
MB1209 revision D-04 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Board known limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.4.1
MB1209 revision D-02 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.4.2
MB1209 revision D-04 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
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Contents
8
UM2032
Federal Communications Commission (FCC)
and ISED Canada Compliance Statements . . . . . . . . . . . . . . . . . . . . . . 37
8.1
8.2
9
FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.1.1
Part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.1.2
Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.1.3
Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
ISED Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
CE conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Codification explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power-supply-related jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Boot options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Boot-related solder bridge and resistor settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
ARDUINO® Uno V3 compatible connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Pin assignment for the extension connector P1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Pin assignment for the extension connector P2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Pin assignment for connector CN15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Pin assignment for connector CN7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Port assignment to the LED indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
I2C extension connector pinout CN10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
USB OTG FS Micro-AB connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
microSD™ connector CN13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
USB Micro-B connector CN6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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5
List of figures
UM2032
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
6/40
32F412GDISCOVERY (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
32F412GDISCOVERY (bottom view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
32F412GDISCOVERY top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
32F412GDISCOVERY bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
32F412GDISCOVERY mechanical drawing (dimensions in millimeters) . . . . . . . . . . . . . . 13
Updating the list of drivers in device manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
R90 and R92 resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
I2C extension connector CN10 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
USB OTG FS Micro-AB connector CN3 (front view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
microSD™ connector CN13 (front view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
USB Micro-B connector CN6 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
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1
Features
Features
•
STM32F412ZGT6 microcontroller, based on the Arm®(a) Cortex®-M4 processor,
featuring 1 Mbyte of Flash memory and 256 Kbytes of RAM in an LQFP144 package
•
1.54-inch, 240x240 pixel TFT color LCD with parallel interface and capacitive touch
panel
•
USB OTG FS
•
I2S audio codec
•
Stereo digital ST-MEMS microphones
•
128-Mbit Quad-SPI NOR Flash memory
•
Reset push-button and joystick
•
4 color user LEDs
•
Board connectors
•
–
microSD™ card
–
User USB with Micro-AB
–
Stereo headset jack with analog microphone input and a loudspeaker output
–
I2C expansion connector
–
ARDUINO® Uno V3 expansion connectors
–
2.54 mm pitch expansion connector for direct access to various features of the
STM32F412ZGT6 microcontroller
Flexible power-supply options:
–
ST-LINK/V2-1
–
User USB FS connector
–
VIN from ARDUINO® Uno V3
–
+5 V from ARDUINO® Uno V3
•
2.0 V and 3.3 V supply voltage options for the STM32F412ZGT6
•
Comprehensive free software libraries and examples available with the STM32Cube
MCU Package
•
On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability:
mass storage, Virtual COM port, and debug port
•
Support of a wide choice of Integrated Development Environments (IDEs) including
IAR Embedded Workbench®, MDK-ARM, and STM32CubeIDE
a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
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Ordering information
2
UM2032
Ordering information
To order the 32F412GDISCOVERY Discovery kit, refer to Table 1. Additional information is
available from the datasheet and reference manual of the target microcontroller.
Table 1. Ordering information
2.1
Order code
Board reference
Target STM32
STM32F412G-DISCO
MB1209
STM32F412ZGT6
Codification
The meaning of the codification is explained in Table 2.
Table 2. Codification explanation
STM32F4XXY-DISCO
STM32F4
XX
Y
DISCO
8/40
Description
Example: STM32F412G-DISCO
MCU series in STM32 32-bit Arm Cortex
STM32F4 Series
MCUs
MCU product line in the series
STM32F412
STM32 Flash memory size:
– G for 1 Mbyte
1 Mbyte
Discovery kit
Discovery kit
UM2032 Rev 3
UM2032
Development environment
3
Development environment
3.1
System requirements
3.2
4
•
Multi.OS support: Windows® 10, Linux® (a) 64-bit, or macOS® (b)
•
USB Type-A or USB Type-C® to Micro-B cable
Development toolchains
•
IAR Systems® - IAR Embedded Workbench® (c)
•
Keil® - MDK-ARM(c) (d)
•
STMicroelectronics - STM32CubeIDE
Conventions
Table 3 provides the definition of some conventions used in the present document.
Table 3. 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
a. Linux® is a registered trademark of Linus Torvalds.
b. macOS® is a trademark of Apple Inc. registered in the U.S. and other countries.
c.
On Windows® only.
d. All other trademarks are the property of their respective owners.
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Hardware layout and configuration
5
UM2032
Hardware layout and configuration
The 32F412GDISCOVERY Discovery kit is designed around the STM32F412ZGT6 (144-pin
TQFP package). The hardware block diagram shown in Figure 3, illustrates the
STM32F412ZGT6 connections with the peripherals. Figure 4 and Figure 5 show the
location of the main components on the Discovery kit.
Figure 3. Hardware block diagram
3.3 V power
supply
32 KHz crystal
2.0 V power
supply
OTG
FS
USB connector
GPIO
Joystick
FSMC
1.54" LCD
GPIOs
ARDUINO®
connectors
RTC
128-Mbyte
Quad-SPI
Flash memory
QSPI
4x LEDs
GPIOs
STM32F412ZGT6
TQFP144 package
I2C2
I2C extension
connector
USART2
ST-LINK/V2-1
SWD
LCD touch
panel
Stereo headset output
I2C1
Audio CODEC
microSD™ card
connector
Analog microphone input
I2S3
SDIO
Monophonic loudspeaker output
DFSDM
GPIOs
Stereo digital
microphones
Extension
connectors
MSv41795V1
10/40
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Hardware layout and configuration
Figure 4. 32F412GDISCOVERY top layout
Audio jack (CN9)
Digital microphones (U4, U5)
USB OTG FS
Micro-AB connector (CN3)
microSD™ connector
(CN13)
VDD_MCU voltage selection
(JP5)
Reset button (B1)
VBUS LED (LD7)
IDD jumper (JP7)
USB fault LED (LD8)
VDD_USB source selection
(JP6)
LCD (ZZ1)
Extension connector (P2)
Extension connector (P1)
Joystick (B2)
STM32F412ZGT6 (U7)
ARDUINO® connectors
(CN1, CN2)
ARDUINO® connectors
(CN11, CN12)
User LEDs
(LD1, LD2, LD3, LD4)
+5 V power LED (LD6)
ARDUINO® LED
(LD9)
Supply source selection
(JP3)
I2C extension connector
(CN10)
SWD connector (CN4)
ST-LINK power switch fault LED
(LD10)
ST-LINK/V2-1 Micro-B USB connector (CN6)
MSv41786V2
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Hardware layout and configuration
UM2032
Figure 5. 32F412GDISCOVERY bottom layout
Capacitive touch panel
connector (CN14)
U16 regulator output
voltage adjustment
(R90, R92)
microSD™ connector
(CN13)
MSv43307V2
12/40
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Hardware layout and configuration
5.1
32F412GDISCOVERY Discovery kit mechanical drawing
Figure 6. 32F412GDISCOVERY mechanical drawing (dimensions in millimeters)
22.86
23.79
5.08
6
5
172
5
1
49
1
50
2
1
1
1 8
2
6
6
3
A
1
25
26
D
1
72
50.8
48
37
37
36
73
36
67
48.26
25
12
44
13
24
2
8
4
5
144
8
49
1
50
2
10
81
2
1
8
7
1
109
2
5 4
4 5
108
29
8
23
28
22
4.06
59.35
65.68
5.2
Embedded ST-LINK/V2-1
ST-LINK/V2-1 programming and debugging tool is integrated into the
32F412GDISCOVERY Discovery kit.
For information about the debugging and programming features, refer to the ST-LINK/V2 incircuit debugger/programmer for STM8 and STM32 user manual (UM1075). For a
comparison of the various ST-LINK solutions, refer to the Overview of ST-LINK derivatives
technical note (TN1235).
5.2.1
Drivers
ST-LINK/V2-1 requires a dedicated USB driver, which, for Windows® 7, Windows® 8 and
Windows® 10, is available from www.st.com.
In cases where the STM32F412 Discovery board is connected to the PC before the driver is
installed, some STM32F412 Discovery board interfaces might be declared as “Unknown” in
the PC device manager. In such cases, the user must install the dedicated driver files and
update the driver of the connected device from the device manager, as shown in Figure 7.
Note:
It is preferable to use the “USB Composite Device” handle for a full recovery.
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Hardware layout and configuration
UM2032
Figure 7. Updating the list of drivers in device manager
5.2.2
ST-LINK/V2-1 firmware upgrade
ST-LINK/V2-1 embeds a mechanism for in-situ firmware upgrade through the USB port. As
firmware may evolve during the lifespan of the ST-LINK/V2-1 product (for example new
functionalities, bug fixes, support for new microcontroller families), visiting the www.st.com
website is recommended before starting to use the STM32F412 Discovery board, then
periodically to stay up-to-date with the latest firmware version.
5.3
Power supply
5.3.1
Power supply sources
The 32F412GDISCOVERY Discovery kit is designed to be powered by the following
sources:
•
5 V DC from the ST-LINK/V2-1 USB connector CN6 with 500 mA current limitation.
Power mechanism of supplying the Discovery kit by the ST-LINK/V2-1 is explained in
Section 5.3.4: Supplying the 32F412GDISCOVERY through the ST-LINK/V2-1 USB
port. A jumper should be placed in location STLK of JP3, connecting pins 3 and 4. The
green LED LD6 is lighted on to confirm the presence of +5 V voltage.
•
5 V DC from the user USB FS connector CN3. A jumper should be placed in location
USB of JP3, connecting pins 5 and 6. The green LED LD6 is lighted on to confirm the
presence of +5 V voltage.
•
6 V to 9 V DC from VIN pin of ARDUINO® Uno V3 compatible connector CN2. The
voltage is limited to 9 V to keep the temperature of the regulator U3 within his thermal
safe area. A jumper should be placed in location E5V of jumper JP3, connecting pin 1
to pin 2 of JP3. The green LED LD6 is lighted on to confirm the presence of +5 V
voltage.
•
5 V DC from +5 V pin of ARDUINO® Uno V3 connector (CN2 pin 5) with limitations.
The jumpers on JP3 and CN5 have to be removed, SB21 (NRST) and SB28 (SWO)
have to be OFF. In such configuration the ST-LINK/V2-1 MCU is not powered, as
consequence the 8 MHz of the ST-LINK/V2-1 cannot be used as external input clock
for the STM32.
For details on JP3 jumper setting refer to Table 4: Power-supply-related jumper settings.
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UM2032
5.3.2
Hardware layout and configuration
STM32 power supply options
The 32F412GDISCOVERY offers the possibility to supply the STM32 under 2.0 V or 3.3 V.
A jumper must be placed in location 2.0 V of JP5 to supply the STM32 under 2.0 V, then
pins 2 and 3 are connected. Similarly the jumper must be placed in 3.3 V to supply the
STM32 with 3.3 V, then pins 1 and 2 of JP5 are connected.
For details on JP5 jumper setting refer to Table 4: Power-supply-related jumper settings.
5.3.3
Modification of STM32 voltage
Regulator U16 is dedicated to the 2.0 V supply. The output voltage of U16 is by default 2.0 V
but it is adjustable depending on the resistors R90 and R92 which are by default 120 and
68 ohms respectively. The output voltage is calculated as follows:
VOUT = VREF × ( 1 + ( R92 ) ÷ ( R90 ) )
with VREF = 1.25 V.
If necessary, resistors R90 and R92 can be changed to modify the STM32 supply voltage.
R90 and R92 are easily located bottom side of the Discovery kit near U16 (see Figure 5 and
Figure 8).
Figure 8. R90 and R92 resistors
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Hardware layout and configuration
5.3.4
UM2032
Supplying the 32F412GDISCOVERY through
the ST-LINK/V2-1 USB port
To power the 32F412GDISCOVERY through the ST-LINK/V2-1, the USB host (a PC) gets
connected with the 32F412GDISCOVERY Micro-B USB receptacle CN6, via a USB cable.
This event starts the USB enumeration procedure. In its initial phase, the current supply
capability of the USB port located on the host, is limited to 100 mA. It is enough because
only the ST-LINK/V2-1 part of the 32F412GDISCOVERY Discovery kit draws power at that
time. If the solder bridge SB18 is OFF (default configuration), the U8 ST890 power switch is
set to OFF position, and only the ST-LINK/V2-1 is powered. In the next phase of the
enumeration procedure, the host PC informs the ST-LINK/V2-1 facility of its capability to
supply up to 500 mA of current. If the answer is positive, the ST-LINK/V2-1 sets the U8
switch to ON position to supply power to the remainder of the 32F412GDISCOVERY
Discovery kit. If the PC USB port is not capable of supplying up to 500 mA of current,
another power source should be used like VIN pin of connector CN2.
Should a short-circuit occur on the Discovery kit, the power switch protects the USB port of
the host against current demand exceeding 600 mA. In such an event, the red LED FAULT
LD10 lights on.
The 32F412GDISCOVERY Discovery kit can also be supplied from a USB power source not
supporting enumeration, such as a USB charger. In this particular case, SB18 solder bridge
must be ON. ST-LINK/V2-1 turns the power switch ON regardless of the enumeration
procedure result and passes the power unconditionally to the Discovery kit.
The green LED LD6 turns on whenever the Discovery kit is powered.
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UM2032
5.3.5
Hardware layout and configuration
Programming/debugging when the power supply
is not from ST-LINK/V2-1
Before connecting the USB cable from the ST-LINK/V2-1 USB connector CN6 to the PC, it
is mandatory to power the Discovery kit using the user USB FS connector CN3 or the VIN
pin of the ARDUINO® Uno V3 connector CN2. Proceeding this way, ensures that the
enumeration succeeds thanks to the external power source.
The following power sequence procedure must be respected:
1.
Put a jumper in JP3 at location USB to use power from the user USB CN3 or at location
E5V to use power from VIN of ARDUINO® Uno V3 connector CN2.
2.
Connect the corresponding external power source.
3.
Check that the green LED LD6 is turned ON
4.
Connect the PC to the ST-LINK/V2-1 USB connector CN6
If this order is not respected, the Discovery kit may be powered by VBUS first from STLINK/V2-1, and the following risks may be encountered:
5.3.6
1.
If more than 500 mA current is needed by the Discovery kit, the PC may be damaged
or current can be limited by PC. As a consequence the Discovery kit is not powered
correctly.
2.
500 mA is requested at the enumeration. If the PC cannot provide such current there is
a risk that the request is rejected and the enumeration does not succeed.
Measurement of current IDD drawn by the microcontroller
The jumper JP7 should be ON by default to supply the STM32F412ZGT6. To measure the
current IDD drawn by the microcontroller STM32F412ZGT6 only, remove the jumper JP7
and replace it by a multimeter (see Table 4).
Table 4. Power-supply-related jumper settings
Jumper
Description
Default Setting
32F412GDISCOVERY is supplied through the Micro-B ST-LINK/V2-1 connector
CN6. Jumper in STLK place.
USB
STLK
E5V
JP3
1
32F412GDISCOVERY is supplied through CN3 Micro-AB USB FS connector.
Jumper in USB place.
USB
STLK
E5V
1
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Hardware layout and configuration
UM2032
Table 4. Power-supply-related jumper settings (continued)
Jumper
Description
32F412GDISCOVERY is supplied through the VIN pin of the ARDUINO® Uno V3
compatible connector CN2. Jumper in E5V place.
USB
STLK
E5V
1
JP3
®
32F412GDISCOVERY is supplied by +5 V pin of ARDUINO Uno V3 compatible
connector CN2 (pin 5) or by pins 3 or 4 of the extension connector P2. No jumper in
JP3.
USB
STLK
E5V
1
Default Setting
STM32F412ZGT6 is supplied with a +3.3 V voltage (VDD_MCU).
+2V
+3V3
1
JP5
STM32F412ZGT6 STM32 is supplied with a +2.0 V voltage (VDD_MCU).
+2V
+3V3
1
+3V3
Default Setting
VDD_USB power pin of STM32F412ZGT6 is supplied with same voltage VDD_MCU
as remainder supply pins of STM32.
VDD
JP6
1
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UM2032
Hardware layout and configuration
Table 4. Power-supply-related jumper settings (continued)
Jumper
Description
+3V3
VDD_USB power pin of STM32F412ZGT6 is supplied with a fix voltage of +3V3
independently of the remainder of supply pins of STM32.
VDD
JP6
1
Default Setting
JP7 IDD is ON by default to supply the STM32F412ZGT6 and when removed, it
offers the possibility to insert an ammeter to measure the current drawn by the
STM32 only.
JP7
IDD
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Hardware layout and configuration
5.4
Clock source
5.4.1
HSE clock source
UM2032
By default the 8 MHz clock source is provided to the STM32F412ZGT6 by the MCO output
of the ST-LINK/V2-1 MCU U6. In that case the solder bridge SB20 is ON, resistors R45 and
R46 are not soldered, solder bridge SB22 is OFF. The pins PH0 and PH1 are not available
for the extension connector P2.
Alternatively, the Discovery kit offers the possibility to use a crystal to provide the 8 MHz
HSE clock source of the STM32F412ZGT6 U7. In that case, PH0 and PH1 are used as
OSC_IN and OSC_OUT respectively. The solder bridges SB20, SB22, SB16 must be OFF,
0 ohm resistors should be soldered to R45 and R46 and a crystal must be soldered in place
X2. Regarding component selection of X2, capacitors C19 and C21 (8.2 pF) are optimized
for a 8 MHz crystal and they are OFF. The pins PH0 and PH1 are not available for the
extension connector P2.
5.4.2
LSE clock source
By default, the 32.768 kHz crystal X3 is connected to pins PC14-OSC32_IN and PC15OSC32_OUT of STM32F412ZGT6 for the RTC clock. Solder bridges SB25 and SB23 must
be OFF.
If LSE clock is not used, it is possible to use PC14-OSC32_IN and PC15-OSC32_OUT of
STM32F412ZGT6 and to access by the extension connector P2. In that case, solder
bridges SB25 and SB23 must be ON and resistors R54, R56 removed.
5.5
Reserved use of solder bridges
The following solder bridges must not be changed otherwise the microcontroller
STM32F412ZGT6 U7 or other parts of the Discovery kit may be damaged:
5.6
•
Solder bridges must be left ON: SB34, SB26
•
Solder bridges must be left OFF: SB27, SB35
Reset source
The reset signal of 32F412GDISCOVERY Discovery kit is low active and the reset sources
include:
20/40
•
Reset button B1, providing solder bridge SB1 is ON (default setting)
•
Embedded ST-LINK/V2-1, providing solder bridge SB21 is ON (default setting)
•
ARDUINO® Uno V3 compatible connector CN2 pin 3
•
Extension connector P1 pin 6
UM2032 Rev 3
UM2032
5.7
Hardware layout and configuration
Boot options
After reset, the STM32F412ZGT6 boots from the following embedded memory locations
depending on bits BOOT0 and BOOT1 (see Table 5):
•
User Flash memory (non-protected)
•
System Flash memory (protected) for In Circuit Programming
•
RAM for debugging
Table 5. Boot options
BOOT0
BOOT1
Boot Memory
0
X
User Flash
1
0
System Flash
1
1
RAM
BOOT0 is set by the input pin BOOT0 of the STM32F412ZGT6. Its level is set by default to
0 by closing the solder bridge SB31 and keeping R69 unfitted. BOOT1 is shared with the
GPIO PB2 used as QSPI_CLK and is sampled by the STM32F412ZGT6 only at RESET
phase. At start-up, BOOT1 level depends on the resistors R104 and R100. By default R100
and R104 are not fitted on the Discovery kit to avoid any influence on the QSPI_CLK signal
using same pin as BOOT1.
The application note “STM32 microcontroller system memory boot mode” Application note
(AN2606) details the bootloader mechanism and configurations.
Boot-related solder bridge and resistor settings are reported in Table 6:
Table 6. Boot-related solder bridge and resistor settings
Resistors, solder bridge
Description
SB31 ON
R100 and
Default Setting
R69 not fitted R104 not fitted
Microcontroller STM32F412ZGT6 boots from user Flash memory.
BOOT0=0
BOOT1=X
R100 not fitted
SB31 OFF
R104 fitted (1)
R69 fitted
BOOT1=0
(any value
(1)
from 0 to 10K) R100 fitted
R104 not fitted
BOOT0=1
BOOT1=1
Microcontroller STM32F412ZGT6 boots from system Flash.
R104 is a pull-down resistor on PB2 shared between BOOT1 and
QSPI_CLK.
Microcontroller STM32F412ZGT6 from RAM.
R100 is a pull-up resistor on PB2 shared between BOOT1 and
QSPI_CLK.
1. To keep Quad-SPI functionality after boot-up phase, the user should select a resistor value of R100 or
R104 insuring a weak pull-down or weak pull-up respectively.
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Hardware layout and configuration
5.8
UM2032
Audio codec
An audio codec U15 connected to the I2S3 interface of the microcontroller
STM32F412ZGT6 offers the possibility to connect a stereo headphone or headset with a
mono-analog microphone. A loudspeaker can be connected to the extension connector.
The digital audio output from the microcontroller is handled by the port of the microcontroller
PB5 called CODEC_I2S3_SD while the other direction is handled by port PB4 called
CODEC_I2S3ext_SD.
The I²C-bus address of the codec is 0b0011010.
5.8.1
Stereo headset and headphone jack
A stereo headphone or a stereo headset with analog microphone can be plugged into the
3.5 mm standard jack socket CN9.
The stereo digital audio streamed from pin PB5 of the microcontroller STM32F412ZGT6 is
transformed in a stereo analog output by the codec and is delivered to the headphone or
headset through the pins 6 and 4 of the jack socket CN9.
If a headset is plugged into CN9, the bias of the microphone is driven by the output
MICBIAS1 of the codec and the analog audio enters into the codec by the pin IN1LN.
The corresponding digital audio output from the codec is connected to the microcontroller
STM32F412ZGT6 by the port PB4.
5.8.2
Loudspeaker output
The 32F412GDISCOVERY Discovery kit can deliver a monophonic audio to a loudspeaker
connected to pins 36 and 38 of the extension connector P2. It is recommended to use the
codec loudspeaker outputs SPKOUTRN and SPKOUTRP in linear mode called "class AB".
This mode is compatible with 4-ohm to 8-ohm impedance loudspeakers. Use of the
switching mode called "class D" requires to use an appropriate filter to maximize rejection of
unwanted frequencies and efficiency. To select the mode "class AB" of the codec, set to 1
the bit 8 of the register 0x23.
5.9
Digital microphones
Two digital microphones U4 and U5 are available on the 32F412GDISCOVERY Discovery
kit. The two microphones are located at a distance of 21 mm each other. The microphones
are connected to the DFSDM of the STM32 by the port PC2 generating the clock and by the
port PB1 collecting the PDM interleaved data.
5.10
USB OTG FS
A USB OTG full-speed communication is available at USB Micro-AB receptacle connector
CN3.
Limitations: the USB-related operating supply voltage of STM32F412ZGT6 (VDD_USB
line) must be within the range from 3.0 V to 3.6 V. Therefore, in case the STM32F412ZGT6
is supplied with 2 V by JP5 set in +2 V position, the USB of the STM32 works only if the
VDD_USB power pin is supplied independently by +3.3 V. This is done by closing pins 2
and 3 of the jumper JP6 (refer to Table 4: Power-supply-related jumper settings).
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UM2032
5.10.1
Hardware layout and configuration
32F412GDISCOVERY is USB device
When the 32F412GDISCOVERY is USB device, the Discovery kit is powered by the 5 V of
the CN3 USB OTG FS Micro-AB connector. In this case a jumper must be put in USB
location of jumper JP3 and the green LEDs LD7 VBUS and LD6 PWR light on to confirm the
5 V presence.
5.10.2
32F412GDISCOVERY is USB host
When the 32F412GDISCOVERY is USB host it supplies the 5 V for the USB peripheral
using one of the following sources:
•
ST-LINK/V2-1 USB Micro-B connector CN6, putting a jumper in STLK location of JP3
•
An external +5 V source connected to pins 3 or 4 of the extension connector P2, with
no jumper in JP3.
•
An external +5 V source connected to 5 V pin of ARDUINO® Uno V3 connector CN2,
with no jumper in JP3.
•
An external source between +7 to +11 V connected to VIN pin of ARDUINO® Uno V3
connector CN2, putting a jumper in E5V location of JP3.
The green LED LD6 is lighted to confirm the presence of the +5 V source.
The power switch is controlled by the port PG8 of STM32 to deliver the 5 V power to the
USB device connected to the USB connector CN3. It is recommended to use PG8 in opendrain mode. When PG8 is closed to ground, the power switch is closed, and the green LED
LD7 confirms the 5 V to the USB Device.
The red LED LD8 FAULT is lit when an overcurrent occurs.
For more details refer to Section 5.3: Power supply.
5.11
microSD™ card
microSD™ cards with a capacity of 4 Gbytes or more can be inserted in the receptacle
CN13. The four bits of the SDIO interface including CLK and CMD signals of the
STM32F412ZGT6 are used to communicate with the microSD™ card. The card detection is
read by the GPIO PD3: when a microSD™ card is inserted, the logic level is 0, otherwise it
is 1.
Note that port PC9 used as uSD_D1 can be routed also to the pin 46 of the extension
connector P2, by closing the solder bridge SB43 for other usage like the alternate function
MCO2. Therefore the use of the microSD™ card is exclusive with MCO2 output.
Limitations: The microSD™ card is not working when the STM32 is supplied with 2 V.
5.12
I2C extension connector
The I2C2 bus is available on the I2C extension connector CN10. I2C2-SDA (port PB9) is
available on pin 1 and I2C2-SCL is available on pin 3. Pins 5 and 7 of CN10 are the VDD
and GND supplying the microcontroller. I2C2 voltage levels follows also VDD.
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Hardware layout and configuration
5.13
UM2032
Quad-SPI NOR Flash memory
A 128-Mbit Quad-SPI NOR Flash memory is connected to the Quad-SPI interface of the
STM32F412ZGT6 microcontroller.
Note that QSPI_CLK (port PB2) is sampled by the STM32F412ZGT6 at start-up as the
BOOT1 bit. If necessary, the user can set the BOOT1 state by fitting one of the resistors
R100 or R104. By default R100 and R104 are not fitted. Refer to Section 5.7: Boot options
for more details.
Limitations: The Quad-SPI memory is not working when the STM32 is supplied with 2 V.
5.14
Virtual COM port
The serial interface USART2 is directly available through a USB Virtual COM port of the
ST-LINK/V2-1. The USB connector is CN6.
5.15
ARDUINO® Uno V3 connectors
CN1, CN2, CN11 and CN12 are female connectors compatible with ARDUINO® Uno V3
standard. Most shields designed for ARDUINO® Uno V3 can fit to the
32F412GDISCOVERY Discovery kit.
Caution:
The I/Os of STM32 microcontroller are 3.3 V compatible instead of 5 V for ARDUINO® Uno
V3.
Table 7. ARDUINO® Uno V3 compatible connectors
Left connectors
Right connectors
CN No.
Pin
No.
Pin name
STM32 pin
Function
Function
STM32
pin
Pin
name
Pin No.
-
-
-
-
-
I2C2_SCL
PB10
D15
10
I2C2_SDA
PB9
D14
9
-
-
-
-
-
AVDD
-
AVDD
8
-
-
-
-
-
Ground
-
GND
7
SPI1_SCK
PA5
D13
6
CN2
Power
24/40
1
-
-
Not
connected
2
IOREF
-
3.3 V
SPI1_MISO
PA6
D12
5
3
NRST
NRST
Reset
TIM3_CH2,
SPI1_MOSI
PA7
D11
4
UM2032 Rev 3
CN No.
CN12
Digital
UM2032
Hardware layout and configuration
Table 7. ARDUINO® Uno V3 compatible connectors (continued)
Left connectors
CN No.
CN2
Power
-
CN1
Analog
Right connectors
Pin
No.
Pin name
STM32 pin
Function
Function
STM32
pin
Pin
name
Pin No.
4
+3V3
-
+3.3 V
input/output
(see Note:1)
TIM2_CH1,
SPI1_NSS
PA15
D10
3
5
+5 V
-
+5 V
input/output
(see Note:4)
TIM4_CH3
PB8
D9
2
6
GND
-
Ground
-
PG10
D8
1
7
GND
-
Ground
-
-
-
-
8
VIN
-
+6 V to +9 V
power input
(see Note:2)
-
PG11
D7
8
-
-
-
-
TIM5_CH1
PF3
D6
7
1
A0
PA1
ADC1_IN1
TIM5_CH4
PF10
D5
6
2
A1
PC1
ADC1_IN11
-
PG12
D4
5
3
A2
PC3
ADC1_IN13
TIM5_CH2
PF4
D3
4
4
A3
PC4
ADC1_IN14
-
PG13
D2
3
A4
PC5 or PB9
(see Note:3)
ADC1_IN15
or
USART6_TX
I2C2_SDA
(see Note:3)
PG14
D1
2
A5
PB0 or PB10
(see Note:3)
ADC1_IN8
or
USART6_RX
I2C2_SCL
(see Note:3)
PG9
D0
1
5
6
CN No.
CN12
Digital
CN11
Digital
Note:1
Important, before using pin 4 of CN2 as +3.3 V input, insure that the solder bridge SB4 is
removed. Otherwise the 32F412GDISCOVERY Discovery kit could be damaged by the
overcurrent.
Note:2
The external voltage applied to pin VIN should be in the range 6 to 9 V at 25°C ambient
temperature. If a higher voltage is applied, the regulator U3 may overheat and could be
damaged.
Note:3
By default pin 5 and pin 6 of connector CN1 are connected respectively to the port PC5
(ADC1_IN15) and BP0 (ADC1_IN8) of the STM32. They are enabled by the default
configuration of the solder bridges: SB8 and SB6 ON, SB7 and SB5 OFF. In case it is
necessary to have an I2C interface instead of ADC inputs on pins 5 and 6 of CN1, have SB8
and SB6 OFF, and SB7 and SB5 ON.
Note:4
Important, before using pin 4 of CN2 as +5 V input, insure the jumpers and solder bridges
are configured according to 5 V DC power input defined in Section 5.3.1: Power supply
sources. Otherwise the 32F412GDISCOVERY Discovery kit could be damaged by the
overcurrent.
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Hardware layout and configuration
5.16
UM2032
Extension connectors P1 and P2
The extension connectors consist in male pin headers P1 and P2 (not soldered by default).
They provide access to the following IPs of the STM32F412ZGT6:
•
SPI
•
I2C with SMBA and FM+ (1 MHz speed)
•
Full USART (Rx, Tx, RTS, CTS)
•
CAN
•
ADC inputs
•
TIMERs channels
•
I2S full duplex with SD and extSD alternate functions.
•
DFSDM input for stereo PDM digital microphones
Most of the ports connected to the extension connectors P1 and P2 are the same for the
32F401CDISCOVERY and 32F411EDISCOVERY Discovery kits, to maximize the
compatibility with the previous designs. In Table 8, Table 9 and in the 32F412GDISCOVERY
schematics (see on www.st.com), the pin numbers corresponding to these ports, are
annotated with the star symbol: “*”.
In Table 8, Table 9 and in the 32F412GDISCOVERY schematics (see on www.st.com) the
pins belonging to the extension connectors P1 and P2 annotated with a letter, are shared
with a peripheral of the 32F412GDISCOVERY (for example, S means that the port PC9
corresponding to pin 46 is also used for microSD™, see Table 9).
Table 8. Pin assignment for the extension connector P1
P1 odd pins
26/40
P1 even pins
Pin No.
Name
Note
Pin No.
Name
Note
1
GND
*
2
GND
*
3
VDD_MCU
*
4
VDD_MCU
*
5
GND
*
6
NRST
*
7
PC1
*A
8
PC0
*
9
PC3
*A
10
PC2
*D
11
PA1
*A
12
-
-
13
PA3
*V
14
PA2
*V
15
PA5
*A
16
PA4
*C
17
PA7
*A
18
PA6
*A
19
PC5
*A
20
PC4
*A
21
PB1
*D
22
PB0
*A
23
GND
*
24
PF2
-
25
PF3
A
26
-
-
27
PF10
A
28
PF11
-
29
-
-
30
PF13
-
31
PG2
C
32
-
-
UM2032 Rev 3
UM2032
Hardware layout and configuration
Table 8. Pin assignment for the extension connector P1 (continued)
P1 odd pins
P1 even pins
Pin No.
Name
Note
Pin No.
Name
Note
33
PG9
A
34
PB10
*A
35
PB11
*D
36
PB12
*C
37
PB13
*
38
PB14
*
39
PB15
*
40
-
-
41
-
-
42
-
-
43
-
-
44
PD12
*
45
PD13
*
46
-
-
47
-
-
48
-
-
49
GND
*
50
GND
*
Table 9. Pin assignment for the extension connector P2
P2 odd pins
P2 even pins
Pin No.
Name
Note
Pin No.
Name
Note
1
GND
*
2
GND
*
3
+5 V
*
4
+5 V
*
5
+3V3
*
6
+3V3
*
7
PH0
*
8
PH1
*
9
PC14
*
10
PC15
*
11
PE6
*
12
PC13
*
13
PE4
*
14
PE5
*
15
PE2
*
16
PE3
*
17
PE0
*
18
PE1
*
19
PB8
*A
20
PB9
*A
21
BOOT0
*
22
VDD_MCU
*
23
PB6
*TC
24
PB7
*TC
25
PB4
*C
26
PB5
*C
27
-
-
28
PB3
*
29
-
-
30
PD6
*
31
PG10
A
32
PG11
A
33
PG12
A
34
PG13
A
35
PG14
A
36
SPKOUTRN
-
37
-
-
38
SPKOUTRP
-
39
PA14
*
40
PA15
*A
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39
Hardware layout and configuration
UM2032
Table 9. Pin assignment for the extension connector P2 (continued)
P2 odd pins
P2 even pins
Pin No.
Name
Note
Pin No.
Name
Note
41
PA10
*
42
PA13
*
43
PA8
*D
44
-
-
45
-
-
46
PC9
*S
47
PC6
*
48
PC7
*C
49
GND
*
50
GND
*
Note:1
The star symbol “*” means pin compatible with the 32F401CDISCOVERY and
32F411EDISCOVERY Discovery kits.
Note:2
Meaning of the letters: “A”: shared with ARDUINO® Uno V3 connectors; C: shared with
codec; D: shared with digital microphones; V: shared with Virtual COM port; T: shared with
capacitive touch panel; S: shared with microSD™.
5.17
LCD display, backlight and touch panel
5.17.1
LCD display
The display is a 1.54-inch, 240x240 pixels TFT color LCD with capacitive touch panel. It
displays up to 262 K colors. The LCD parallel interface is connected to the FMC of the
STM32F412ZGT6 by the connector CN15 (see Table 10).
To enable the data bus of the LCD display in 16-bit mode, the solder bridges SB41 and
SB42 are OFF and ON respectively by default. In this way the IM signal of the LCD is set to
high.To use the LCD in 8-bit mode, SB41 must be ON and SB42 OFF.
The selection of the LCD is performed by FMC_NE1 (PD7), write-enable signal is
FMC_NWE (PD5) and read-enable is FMC_NOE (PD4). The address bit A0 of the FMC
(Flexible Static Memory Controller) is used to select data/command access to the LCD.
The port PG4 should be used as an input of the microcontroller connected to the LCD signal
TE (Tearing Effect). To avoid visible artifacts on the display, TE signal is used to synchronize
the refresh of the LCD memory done by the microcontroller with the LCD scan.
The port PD11 of the STM32F412ZGT6 controls the reset of the LCD display LCD_RESET.
Table 10. Pin assignment for connector CN15
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CN15 pin
Signal
name
Description
STM32 pin
involved
1
GND
Ground
GND
2
LCD_TE
Tearing Effect output pin to send an interrupt to STM32
PG4
3
D15
Data connected to FMC
PD10
4
D14
Data connected to FMC
PD9
5
D13
Data connected to FMC
PD8
UM2032 Rev 3
UM2032
Hardware layout and configuration
Table 10. Pin assignment for connector CN15 (continued)
5.17.2
CN15 pin
Signal
name
Description
STM32 pin
involved
6
D12
Data connected to FMC
PE15
7
D11
Data connected to FMC
PE14
8
D10
Data connected to FMC
PE13
9
D9
Data connected to FMC
PE12
10
D8
Data connected to FMC
PE11
11
D7
Data connected to FMC
PE10
12
D6
Data connected to FMC
PE9
13
D5
Data connected to FMC
PE8
14
D4
Data connected to FMC
PE7
15
D3
Data connected to FMC
PD1
16
D2
Data connected to FMC
PD0
17
D1
Data connected to FMC
PD15
18
D0
Data connected to FMC
PD14
19
/RD
Read of LCD connected to FMC_NOE
PD4
20
/WR
Write of LCD connected to FMC_NWE
PD5
21
RS
Data/Command select connected to A0
PF0
22
/CS
Chip Select of LCD connected to FMC_NE1
PD7
23
RESET
LCD RESET
PD11
24
IM
8-bit (low)/16-bit (high) mode selection pin
n/a
25
IOVCC
LCD I/Os power supply connected to VDD
n/a
26
VCI
Power supply connected to +3.3 V
n/a
27
GND
Ground
GND
28
LEDA
Anode of backlight LED
n/a
29
LEDK
Cathode of backlight LED
n/a
LCD signal access (CN7)
CN7 is the footprint of a dual-row, through-hole, 26-pin header with 2.54 mm pitch. The
header CN7 gives an easy access to the FMC signals of the LCD (see Table 11).
Table 11. Pin assignment for connector CN7
CN7 odd pins
Signal name
CN7 even pins
Signal name
1
A0
2
LCD_BLCTRL
3
FMC_NWE
4
GND
5
FMC_NE1
6
FMC_NOE
7
D0
8
D1
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39
Hardware layout and configuration
UM2032
Table 11. Pin assignment for connector CN7 (continued)
5.17.3
CN7 odd pins
Signal name
CN7 even pins
Signal name
9
D2
10
+3.3 V
11
D3
12
VDD
13
LCD_TE
14
LCD_RESET
15
D4
16
D5
17
D6
18
D7
19
D8
20
D9
21
D10
22
D11
23
D12
24
D13
25
D14
26
D15
Backlight
LEDK and LEDA signals of the LCD module are the cathode and the anode respectively of
the backlight LEDs.
The backlight requires a current source of typically 15 mA capable to deliver a voltage up to
10 V. This function is handled by the backlight-driver circuit that is a switching-mode-boost
converter, supplied by the +5 V rail of the Discovery kit.
The high level on the signal LCD_BLCTRL (PF5) lights the backlight on. It is possible to dim
the backlight intensity by applying a low-frequency PWM signal to LCD_BLCTRL (1 to
10 kHz).
5.17.4
Touch panel
The touch panel is a capacitive touch panel using an I2C interface. The 10-pin connector
CN14 of the touch panel is located at the bottom side of the Discovery kit (see Figure 5:
32F412GDISCOVERY bottom layout). The I2C SDA line is connected to PB7 and the I2C
SCL line is connected to PB6. An interrupt output CTP_INT is connected to port PG5 to be
used as an interruption input of the microcontroller. Port PF12 is the reset of the capacitive
touch panel.
5.18
Joystick and LEDs
The blue button B2 is a 4-direction joystick with a selection mode when pressed in the
center. The logic state is high when one of the five-position switches (Left, Right, Up, Down,
Selection) is pressed. The center position is connected to a wake-up pin of the
microcontroller PA0. This offers the possibility to wake-up the microcontroller by pressing
the center of the joystick.
Four LEDs located near the ARDUINO® Uno V3 connectors CN1 and CN2 are available for
the user (refer to the Figure 4: 32F412GDISCOVERY top layout). From left to right the user
finds LD1, LD2, LD3 and LD4 with their colors green, orange, red and blue respectively. To
light a LED a low-logic state 0 must be written in the corresponding GPIO.
Table 12 gives the assignment of control ports to the LED indicators.
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UM2032 Rev 3
UM2032
Hardware layout and configuration
Table 12. Port assignment to the LED indicators
LED
Controlled by STM32 port
Color
LD1
PE0
Green
LD2
PE1
Orange
LD3
PE2
Red
LD4
PE3
Blue
UM2032 Rev 3
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39
Connectors
UM2032
6
Connectors
6.1
I2C extension connector CN10
Figure 9. I2C extension connector CN10 (front view)
1
7
2
8
MS30715V2
Table 13. I2C extension connector pinout CN10
6.2
Pin number
Description
Pin number
Description
1
I2C1_SDA (PB9)
5
VDD
2
NC
6
NC
3
I2C1_SCL (PB10)
7
GND
4
EXT_RESET (PF11)
8
NC
USB OTG FS Micro-AB connector CN3
Figure 10. USB OTG FS Micro-AB connector CN3 (front view)
Table 14. USB OTG FS Micro-AB connector CN3
32/40
Pin number
Description
Pin number
Description
1
VBUS (PA9)
4
ID (PA10)
2
DM (PA11)
5
GND
3
DP (PA12)
-
-
UM2032 Rev 3
UM2032
6.3
Connectors
microSD™ connector CN13
Figure 11. microSD™ connector CN13 (front view)
Table 15. microSD™ connector CN13
6.4
Pin
number
Description
Pin
number
Description
1
SDIO_D2 (PC10)
6
GND
2
SDIO_D3 (PC11)
7
SDIO_D0 (PC8)
3
SDIO_CMD (PD2)
8
SDIO_D1 (PC9)
4
+3.3 V
9
GND
5
SDIO_CLK (PC12)
10
MicroSDcard_detect (PD3)
ST-LINK/V2-1 USB Micro-B connector CN6
Figure 12. USB Micro-B connector CN6 (front view)
UM2032 Rev 3
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39
Connectors
UM2032
Table 16. USB Micro-B connector CN6
34/40
Pin number
Description
Pin number
Description
1
VBUS (power)
4
GND
2
DM
5,6
Shield
3
DP
-
-
UM2032 Rev 3
UM2032
32F412GDISCOVERY Discovery kit information
7
32F412GDISCOVERY Discovery kit information
7.1
Product marking
The stickers located on the top or bottom side of the PCB provide product information:
•
Product order code and product identification for the first sticker
•
Board reference with revision, and serial number for the second sticker
On the first sticker, the first line provides the product order code, and the second line the
product identification.
On the second sticker, the first line has the following format: “MBxxxx-Variant-yzz”, where
“MBxxxx” is the board reference, “Variant” (optional) identifies the mounting variant when
several exist, "y" is the PCB revision and "zz" is the assembly revision, for example B01.
The second line shows the board serial number used for traceability.
Evaluation tools marked as “ES” or “E” are not yet qualified and therefore 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 designs or in production.
“E” or “ES” marking examples of location:
•
On the targeted STM32 that is soldered on the board (For an illustration of STM32
marking, refer to the STM32 datasheet “Package information” paragraph at the
www.st.com website).
•
Next to the evaluation tool ordering part number that is stuck or silk-screen printed on
the board.
Some boards feature a specific STM32 device version, which allows the operation of any
bundled commercial stack/library available. This STM32 device shows a "U" marking option
at the end of the standard part number and is not available for sales.
In order to use the same commercial stack in his application, a developer may need to
purchase a part number specific to this stack/library. The price of those part numbers
includes the stack/library royalties.
UM2032 Rev 3
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39
32F412GDISCOVERY Discovery kit information
7.2
32F412GDISCOVERY product history
7.2.1
Product identification 32F412GDISCO/
UM2032
This product identification is based on the mother board MB1209-F412ZGT6-D02
It embeds the STM32F412ZGT6 microcontroller with silicon revision code "C". The
limitations of this silicon revision are detailed in the errata sheet STM32F412xE/xG device
errata (ES0305).
7.2.2
Product identification DK32F412G$AU1
This product identification is based on the mother board MB1209-F412ZGT6-D04.
It embeds the STM32F412ZGT6 microcontroller with silicon revision code "C" or “1”. The
limitations of these silicon revisions are detailed in the errata sheet STM32F412xE/xG
device errata (ES0305).
7.3
Board revision history
7.3.1
MB1209 revision D-02
The revision D-02 of the MB1209 board is the initial release.
7.3.2
MB1209 revision D-04
The revision D-04 of the MB1209 board corresponds to:
•
ZZ1 (touch panel) replaced with FRIDA FRD154B2902-D-CTQ with impact on firmware
•
Several part references updated due to obsolescence (such as MEMS microphones or
others, see bill of materials for details)
7.4
Board known limitations
7.4.1
MB1209 revision D-02
None.
7.4.2
MB1209 revision D-04
No demonstration software is provided from this revision.
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UM2032 Rev 3
UM2032 Federal Communications Commission (FCC) and ISED Canada Compliance Statements
8
Federal Communications Commission (FCC)
and ISED Canada Compliance Statements
8.1
FCC Compliance Statement
8.1.1
Part 15.19
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.
8.1.2
Part 15.21
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.
8.1.3
Part 15.105
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.
Responsible party (in the USA)
Terry Blanchard
Americas Region Legal | Group Vice President and Regional Legal Counsel, The Americas
STMicroelectronics, Inc.
750 Canyon Drive | Suite 300 | Coppell, Texas 75019
USA
Telephone: +1 972-466-7845
8.2
ISED Compliance Statement
Compliance Statement
ISED Canada ICES-003 Compliance Label: CAN ICES-3 (A) / NMB-3 (A).
Déclaration de conformité
Étiquette de conformité à la NMB-003 d'ISDE Canada : CAN ICES-3 (A) / NMB-3 (A).
UM2032 Rev 3
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39
CE conformity
9
UM2032
CE conformity
EN 55032 / CISPR32 (2012) Class A product
Warning: This device is compliant with Class A of EN55032 / CISPR32. In a residential
environment, this equipment may cause radio interference.
Avertissement : cet équipement est conforme à la Classe A de la EN55032 / CISPR 32.
Dans un environnement résidentiel, cet équipement peut créer des interférences radio.
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UM2032 Rev 3
UM2032
Revision history
Revision history
Table 17. Document revision history
Date
Revision
28-Jul-2016
1
Initial version.
2
Added sections:
Section Appendix B: Federal Communications Commission
(FCC) and Industry Canada (IC) Compliance Statements,
Section Appendix C: CISPR32.
3
Removed Schematics, Technology partner and Demonstration
software.
Added Chapter 7: 32F412GDISCOVERY Discovery kit
information.
Updated Figure 3: Hardware block diagram, Figure 4:
32F412GDISCOVERY top layout, Figure 5:
32F412GDISCOVERY bottom layout, Section 5.2: Embedded
ST-LINK/V2-1, Section 5.8: Audio codec, Chapter 8: Federal
Communications Commission (FCC) and ISED Canada
Compliance Statements and Chapter 9: CE conformity.
Revised the beginning of the document:
– Updated Introduction, Chapter 1: Features, Chapter 2:
Ordering information, Section 3.1: System requirements and
Section 3.2: Development toolchains
– Added Section 2.1: Codification and Chapter 4: Conventions
08-Nov-2016
27-Oct-2021
Changes
UM2032 Rev 3
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UM2032
IMPORTANT NOTICE – PLEASE READ CAREFULLY
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improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on
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Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or
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No license, express or implied, to any intellectual property right is granted by ST herein.
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Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2021 STMicroelectronics – All rights reserved
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UM2032 Rev 3
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