ST STM32H745I-DISCO User manual
Introduction
The STM32H745I-DISCO and STM32H750B-DK Discovery kits are complete demonstration and development platforms for
STMicroelectronics Arm® Cortex®-M7 and -M4 dual-core-based STM32H745XI (STM32H745XIH6 order code) and
STM32H750XB (STM32H750XBH6 order code) microcontrollers. Both devices feature four I2Cs, six SPIs with three multiplexed
simplex I2Ss, two SD/SDIO/DMMC interfaces, four USARTs, four UARTs, one LPUART, two CAN controllers, three 16-bit ADCs,
two 12-bit DACs, four SAIs, 8- to 14-bit digital camera interface, 1 Mbyte (STM32H745XIH6) or 128 Kbytes (STM32H750XBH6)
of internal SRAM and 2 Mbytes of Flash memory, a USB OTG HS and a USB OTG FS, an Ethernet MAC interface, an FMC
interface, a Quad-SPI interface, and SWD debugging support. The STM32H745I-DISCO and STM32H750B-DK Discovery kits
enable users to quickly get started and develop applications.
In addition, the STM32H745I-DISCO and STM32H750B-DK, shown in Figure 1 and Figure 2, can be used as a reference
design for user application prototyping before porting to the final product.
The full range of hardware features available on the board helps users improve application development by an evaluation of
almost all peripherals (such as USB OTG FS, Ethernet 10/100Mb/s, eMMC, USART, SAI Audio DAC stereo with audio jack
input and output, MEMS digital microphone, SDRAM, Quad-SPI Flash memory, and RGB LCD interface with capacitive multi-
touch panel). ARDUINO® Uno V3 connectors provide easy connection to extension shields or daughterboards for specific
applications.
STLINK-V3E is integrated into the board, as an embedded in-circuit debugger and programmer for the STM32 microcontroller
and the USB Virtual COM port bridge.
The STM32H745I-DISCO and STM32H750B-DK boards come with the STM32CubeH7 MCU package, which provides an
STM32 comprehensive software HAL library as well as various software examples.
Figure 1. STM32H745I-DISCO and STM32H750B-DK
boards (top view)
Figure 2. STM32H745I-DISCO and STM32H750B-DK
boards (bottom view)
Pictures are not contractual. PCB colors may differ.
Discovery kits with STM32H745XI and STM32H750XB microcontrollers
UM2488
User manual
UM2488 - Rev 4 - September 2019
For further information contact your local STMicroelectronics sales office. www.st.com
1Features
• Arm® Cortex® core-based microcontroller with 2 Mbytes (STM32H745XIH6) or 128 Kbytes
(STM32H750XBH6) of Flash memory and 1 Mbyte of RAM, in TFBGA240+25 package
• 4.3” RGB interface LCD with touch panel connector
• Ethernet compliant with IEEE-802.3-2002, and PoE
• USB OTG FS with Micro-AB connector
• SAI audio codec
• One ST-MEMS digital microphone
• 2 x 512-Mbit Quad-SPI NOR Flash memory
• 128-Mbit SDRAM
• 4-Gbyte on-board eMMC
• 1 user and reset push-button
• Fanout daughterboard
• 2 x FDCANs
• Board connectors:
– USB FS Micro-AB connectors
– ST-LINK Micro-B USB connector
– USB power Micro-B connector
– Ethernet RJ45
– Stereo headset jack including analog microphone input
– Audio header for external speakers
– Tag-Connect (TAG) 10-pin footprint
– Arm® Cortex® 10-pin 1.27 mm pitch debug connector over STDC14 footprint
– ARDUINO® Uno V3 expansion connectors
– STMod+
• Flexible power-supply options:
– STLINK-V3 USB connector, USB FS connector
– 5 V delivered by RJ45 (Power over Ethernet)
– 5 V delivered by ARDUINO® or external connector
– USB charger
– USB power
• On-board STLINK-V3E 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™, Keil® and GCC-
based IDEs
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
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Features
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2Ordering information
To order the STM32H745I-DISCO and STM32H750B-DK Discovery kits, refer to Table 1. Additional information is
available from the datasheet and reference manual of the target STM32.
Table 1. List of available products
Order code Board reference Target STM32
STM32H745I-DISCO MB1381 STM32H745XIH6U
STM32H750B-DK STM32H750XBH6U
2.1 Product marking
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 design or in production.
“E” or “ES” marking examples of location:
• On the targeted STM32 that is soldered on the board (for 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.
2.2 Codification
The meaning of the codification is explained in Table 2.
Table 2. Codification explanation
STM32H7XXY-DISCO
STM32H7XXY-DK Description Example: STM32H745I-DISCO
STM32H7 MCU series in STM32 Arm Cortex MCUs STM32H7 Series
XX MCU product line in the series STM32H745
Y
STM32 Flash memory size:
• B for 128 Kbytes
• I for 2 Mbytes
2 Mbytes
DISCO / DK Discovery kit Discovery kit
The order code is mentioned on a sticker placed on the top side of the board.
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Ordering information
UM2488 - Rev 4 page 3/55
3Development environment
3.1 System requirements
• Windows® OS (7, 8 and 10), Linux® 64-bit, or macOS®
• USB Type-A to Micro-B cable
Note: macOS® is a trademark of Apple Inc. registered in the U.S. and other countries.
All other trademarks are the property of their respective owners.
3.2 Development toolchains
• Keil® MDK-ARM (see note)
• IAR™ EWARM (see note)
• GCC-based IDEs
Note: On Windows® only.
3.3 Demonstration software
The demonstration software, included in the STM32Cube MCU Package corresponding to the on-board
microcontroller, is preloaded in the STM32 Flash memory for easy demonstration of the device peripherals in
standalone mode. The latest versions of the demonstration source code and associated documentation can be
downloaded from www.st.com.
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Development environment
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4Conventions
Table 3 provides the conventions used for the ON and OFF settings in the present document.
Table 3. ON/OFF convention
Convention Definition
Jumper JPx ON Jumper fitted
Jumper JPx OFF Jumper not fitted
Jumper JPx [1-2] Jumper should be fitted between Pin 1 and Pin 2
Solder bridge SBx ON SBx connections closed by 0 Ω resistor
Solder bridge SBx OFF SBx connections left open
Resistor Rx ON Resistor soldered
Resistor Rx OFF Resistor not soldered
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Conventions
UM2488 - Rev 4 page 5/55
5Delivery recommendations
Before the first use, make sure that no damage occurred to the board during shipment and no socketed
components are not firmly fixed in their sockets or loose in the plastic bag.
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Delivery recommendations
UM2488 - Rev 4 page 6/55
6Hardware layout and configuration
The STM32H745I-DISCO and STM32H750B-DK Discovery kits are designed around the STM32H745XIH6 and
STM32H750XBH6 microcontrollers, respectively. Both microcontrollers are packaged in TFBGA240+25. The
hardware block diagram (see Figure 3) illustrates the connection between the microcontroller and the peripherals
(SDRAM, eMMC, Quad-SPI Flash memory, FDCAN, LCD RGB connector, USB OTG connectors, UART,
Ethernet, Audio, TAG connector, STDC connector, ARDUINO® Uno shields and embedded ST-LINK). Figure 4
and Figure 5 help to locate these features on the STM32H745I-DISCO and STM32H750B-DK boards.
Figure 3. Hardware block diagram
STM32H745XI/STM32H750XB
in TFGA240+25
RTC
UART3
FMC
OTG
FDCAN1/2
SDMMC1
QSPI
PWR
32.768 kHz crystal
STLINK-V3E
128 Mbit SDRAM
USB connector
2x FDCANs
4 Gbyte eMMC
2x512 Mbit Quad-SPI Flash
memory
Power supply
STMod+ connector
ARD connector
MII
I2C4
TAG connector SWD
STDC connector
Ethernet
LCD 4.3 inch RGB LCD
SAI2 Audio Codec
PDM
SPI2
POE
UART2
UART1
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Hardware layout and configuration
UM2488 - Rev 4 page 7/55
6.1 STM32H745I-DISCO and STM32H750B-DK layout
Figure 4. STM32H745I-DISCO and STM32H750B-DK Discovery board top layout
B1 reset button
B2 user button
CN1 Ethernet
connector
LD6/LD7/LD8
user LEDs
JP8 power
header
U33 RGB LCD
connector
U34 MEMS
microphone
P1 STMod+
connector
CN16 TAG
connector
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STM32H745I-DISCO and STM32H750B-DK layout
UM2488 - Rev 4 page 8/55
Figure 5. STM32H745I-DISCO and STM32H750B-DK Discovery board bottom layout
CN1 Ethernet
connector JP8 power
header
U6 MCU
U7 SDRAM
U1, U2 QSPI
CN12, CN16 Arduino
connectors
CN15 USB power
connector
CN14 STLK USB
connector
CN3, CN7 Arduino
connectors
CN13 USB OTG_FS
connector
U21, U22
FDCANs
U11 eMMC
CN8 line in
connector
CN9 line out
connector
P1 STMod+
connector
CN14 STDC14
connector
U15 Audio
Codec
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STM32H745I-DISCO and STM32H750B-DK layout
UM2488 - Rev 4 page 9/55
6.2 STM32H745I-DISCO and STM32H750B-DK mechanical drawing
Figure 6 shows the mechanical dimensions of the STM32H745I-DISCO and STM32H750B-DK boards.
Figure 6. STM32H745I-DISCO and STM32H750B-DK Discovery board mechanical drawing (bottom view)
6.3 Embedded STLINK-V3E
The STLINK-V3E programming and debugging tool is integrated into the STM32H745I-DISCO and
STM32H750B-DK Discovery kits. It supports:
• USB software re-enumeration
• Virtual COM port interface on USB
• Mass storage interface on USB
• USB power management request for more than 100 mA power on USB
The USB connector (CN14) can be used to power the STM32H745I-DISCO and STM32H750B-DK regardless of
the STLINK-V3E facility used for debugging or programming the STM32H745XIH6 and STM32H750XBH6. This
holds also when the STLINK-V3E standalone tool is connected to CN4 or CN16 connector and used for
debugging or programming the STM32H745XIH6 and STM32H750XBH6. Section 6.4 Power supply provides
more details about STM32H745I-DISCO and STM32H750B-DK powering.
Refer to www.st.com for details about STLINK-V3E.
UM2488
STM32H745I-DISCO and STM32H750B-DK mechanical drawing
UM2488 - Rev 4 page 10/55
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