ST UM1932 User manual

March 2022 UM1932 Rev 4 1/31
1
UM1932
User manual
Discovery kit with STM32F469NI MCU
Introduction
The STM32F469 Discovery kit (32F469IDISCOVERY) is a complete demonstration and
development platform for the STMicroelectronics Arm®Cortex®-M4 core-based
STM32F469NIH6 microcontroller with Chrom-ART Accelerator. This microcontroller
features three I2C interfaces, six SPIs with two multiplexed full-duplex I2S interfaces, SDIO,
four USART ports, four UART ports, two CAN buses, three 12-bit ADCs, two 12-bit DACs,
one SAI, 8 to 14-bit digital camera digital module interface, internal 320+4 Kbytes of SRAM
and 2-Mbyte flash memory, USB HS OTG and USB FS OTG, Ethernet MAC, FMC interface,
MIPI DSI®interface, Quad-SPI interface, JTAG debugging support. This Discovery kit offers
everything required for the users to get started quickly and develop applications easily.
The hardware features on the board help the users to evaluate the following peripherals:
USB OTG FS, microSD™ card, audio DAC with headset jack, digital microphones, SDRAM,
Quad-SPI flash memory, 4" TFT LCD using MIPI DSI®interface with capacitive touch panel.
The ARDUINO®compatible connectors expand the functionality with a wide choice of
specialized shields. The extension header makes it possible to easily connect a
daughterboard for specific application. The integrated ST-LINK/V2-1 provides an embedded
in-circuit debugger and programmer for the STM32 microcontroller.
Figure 1. 32F469IDISCOVERY board (top view)
Figure 2. 32F469IDISCOVERY board (bottom view)
Pictures are not contractual.
www.st.com

Contents UM1932
2/31 UM1932 Rev 4
Contents
1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Codification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Development environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.1.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.1 Power supply sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.2 Supplying the board through ST-LINK/V2-1 USB port . . . . . . . . . . . . . . 12
4.2.3 Measurement of current IDD drawn by the STM32F469NI . . . . . . . . . . 13
4.2.4 Power related jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.1 HSE clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.2 LSE clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 Reset source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.5 Audio outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.6 Digital microphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.7 USB OTG FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.8 microSD™ card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.9 SDRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.10 Quad-SPI NOR flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.11 Virtual COM port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.12 ARDUINO®connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.13 Extension connector CN12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.14 DSI LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

UM1932 Rev 4 3/31
UM1932 Contents
3
4.15 Buttons and LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.16 I2C extension connector CN11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.17 USB OTG FS Micro-AB connector CN13 . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.18 microSD™ connector CN9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.19 ST-LINK/V2-1 USB Mini-B connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . 24
4.20 Audio jack CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5 Mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6 32F469IDISCOVERY Discovery kit information . . . . . . . . . . . . . . . . . . 26
6.1 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2 32F469IDISCOVERY product history . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2.1 Product identification 32F469IDISCO/ . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2.2 Product identification DK32F469I$AU1 . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2.3 Product identification DK32F469I$AU2 . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.3 Board revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.3.1 Board MB1189 revision B-07 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.3.2 Board MB1189 revision B-08 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.3.3 Board MB1189 revision C-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4 Board known limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4.1 Board MB1189 revision B-07 limitations . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4.2 Board MB1189 revision B-08 limitations . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4.3 Board MB1189 revision C-01 limitations . . . . . . . . . . . . . . . . . . . . . . . . 27
7 Federal Communications Commission (FCC)
and Industry Canada (IC) Compliance . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.1 FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.1.1 Part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.1.2 Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.1.3 Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.2 IC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8 CE conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.1 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

List of tables UM1932
4/31 UM1932 Rev 4
List of tables
Table 1. List of available products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2. Codification explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Power related jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 4. ARDUINO®compatible connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 5. ARDUINO®compatible connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 6. Extension connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 7. DSI LCD module connector (CN10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 8. Port assignment for control of LED indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 9. I2C extension connector pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 10. USB OTG FS Micro-AB connector CN13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 11. microSD™ connector CN9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 12. USB Mini-B connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 13. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

UM1932 Rev 4 5/31
UM1932 List of figures
5
List of figures
Figure 1. 32F469IDISCOVERY board (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. 32F469IDISCOVERY board (bottom view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 3. Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4. 32F469IDISCOVERY top side layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5. 32F469IDISCOVERY bottom side layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 6. USB Composite device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 7. Extension connector CN12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 8. I2C extension connector (front view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 9. USB OTG FS Micro-AB connector CN13 (front view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 10. microSD™ connector CN9 (front view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 11. USB Mini-B connector CN1 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 12. Mechanical dimensions in millimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Features UM1932
6/31 UM1932 Rev 4
1 Features
•STM32F469NIH6 microcontroller, based on the Arm®(a) Cortex®-M4 processor, with
2 Mbytes of flash memory and 324 Kbytes of RAM, in a BGA216 package
•4” RGB 800×480 pixel TFT color LCD with MIPI DSI®interface and capacitive touch
panel
•USB OTG FS
•SAI audio DAC
•3 ST-MEMS digital microphones
•128-Mbit Quad-SPI NOR flash memory
•4 M×32bit SDRAM
•Reset and wake-up push-buttons
•4 color user LEDs
•Board connectors:
–microSD™card
– USB with Micro-AB
– Stereo headphone output jack
–I
2C expansion
– ARDUINO®Uno V3 expansion
– 2.54 mm pitch expansion
•Flexible power-supply options: ST-LINK USB VBUS, USB connector, or external
sources
•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.

UM1932 Rev 4 7/31
UM1932 Ordering information
30
2 Ordering information
To order the 32F469IDISCOVERY Discovery kit, refer to Table 1. Additional information is
available from the datasheet and reference manual of the target microcontroller.
2.1 Codification
The meaning of the codification is explained in Table 2.
3 Development environment
3.1 System requirements
•Multi.OS support: Windows®10, Linux®(a) 64-bit, or macOS® (b) (c)
•USB Type-A or USB Type-C®to Mini-B cable
3.2 Development toolchains
•IAR Systems®- IAR Embedded Workbench®(d)
•Keil®- MDK-ARM(d)
•STMicroelectronics - STM32CubeIDE
Table 1. List of available products
Order code Board reference Target STM32
STM32F469I-DISCO MB1189 STM32F469NIH6
Table 2. Codification explanation
STM32XXYYZ-TTTTT Description Example: STM32F469I-DISCO
STM32XX MCU series in STM32 32-bit Arm Cortex
MCUs STM32F4 Series
YY MCU product line in the series STM32F469
ZSTM32 flash memory size:
– I for 2 Mbytes 2 Mbytes
TTTTT Toolkit:
– DISCO: Discovery kit Discovery kit
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. All other trademarks are the property of their respective owners.
d. On Windows®only.

Hardware layout and configuration UM1932
8/31 UM1932 Rev 4
4 Hardware layout and configuration
The 32F469IDISCOVERY Discovery board is designed around the STM32F469NIH6 (216-
pin BGA package). Figure 3 illustrates the connection between the STM32F469NIH6 and
the peripherals (SDRAM, Quad-SPI flash memory, color LCD, USB OTG connector, audio,
I2C extension connector, microSD™ card, and embedded ST-LINK). Figure 4:
32F469IDISCOVERY top side layout and Figure 5: 32F469IDISCOVERY bottom side layout
help to locate these features on the actual Discovery board.
Figure 3. Hardware block diagram
MSv38599V3
STM32F469NIH6
BGA216 package
Audio codec
RTC
3.3 V power
supply
32 KHz crystal
4x LEDs
ST-LINK/V2-1
I2C2
SAI1
I2C extension
connector
4" DSI LCD
microSD™ card
connector
Wake-up buttonGPIO
SDIO
FMC
128-Mbit
SDRAM
QSPI
128-Mbit
Quad-SPI
flash memory
OTG
FS USB connector
USART3
MIPI DSI®
1.8 V power
supply
GPIOs
SWD
Stereo headphone
output
Stereo digital
microphones
SPI3
LCD touch
panel
ARDUINO®
connector
Extension
connector
I2C1

UM1932 Rev 4 9/31
UM1932 Hardware layout and configuration
30
Figure 4. 32F469IDISCOVERY top side layout
MSv38596V3
Green, orange, red, blue LEDs
(LD1, LD2, LD3, LD4 respectively)
Digital microphone (U1)
4" DSI LCD (ZZ1)
VBUS LED (LD8)
Solder bridge (SB17)
Solder bridge (SB18)Digital microphone (U2)
Digital microphone (U6)

Hardware layout and configuration UM1932
10/31 UM1932 Rev 4
Figure 5. 32F469IDISCOVERY bottom side layout
MSv38597V3
Audio jack (CN3)
Wake-up button (B2)
Reset button (B1)
microSD™ card (CN9)
I2C extension connector
(CN11)
IDD current measurement
jumper (JP5)
USB OTG FS connector (CN13)
ARDUINO®connector
(CN5)
ARDUINO®connector
(CN7)
ST-LINK/V2-1 USB (CN1)
STM32F469NIH6
(U14)
Extension connector (CN12)
ARDUINO®connector
(CN8)
ARDUINO®connector
(CN6)
ST-LINK/V2-1
COM LED (LD6)
Power selection jumper (JP2)
5 V LED (LD5)

UM1932 Rev 4 11/31
UM1932 Hardware layout and configuration
30
4.1 Embedded ST-LINK/V2-1
The ST-LINK/V2-1 programming and debugging tool is integrated on the
32F469IDISCOVERY board. Compared to ST-LINK/V2 the additional features supported on
ST-LINK/V2-1 are:
•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
This feature is no more supported on ST-LINK/V2-1:
•SWIM interface
For all general information concerning debugging and programming features common
between V2 and V2-1 please refer to ST-LINK/V2 user manual (UM1075) and technical note
(TN1235).
4.1.1 Drivers
Before connecting the 32F469IDISCOVERY board to a Windows®7, Windows®8 or
Windows®10 PC via USB, a driver for ST-LINK/V2-1 must be installed. It can be
downloaded from the www.st.com webpage.
If the 32F469IDISCOVERY board is connected to the PC before installing the driver, the
Windows®device manager may report some USB devices found on 32F469IDISCOVERY
as “Unknown”. To recover from this situation, after installing the dedicated driver
downloaded from the www.st.com webpage, the association of “Unknown” USB devices
found on 32F469IDISCOVERY to this dedicated driver, must be updated in the device
manager manually. It is recommended to proceed using the USB Composite Device line, as
shown in Figure 6.
Note: Prefer using the “USB Composite Device” handle for a full recovery.
Figure 6. USB Composite device
4.1.2 ST-LINK/V2-1 firmware upgrade
ST-LINK/V2-1 facility for debug and programming of the target microcontroller
STM32F469NIH6 is integrated on the 32F469IDISCOVERY board. For its own operation,
ST-LINK/V2-1 employs a dedicated MCU with flash memory. Its firmware determines ST-

Hardware layout and configuration UM1932
12/31 UM1932 Rev 4
LINK/V2-1 functionality and performance. The firmware may evolve during the life span of
32F469IDISCOVERY to include new functionality, fix bugs or support new target
microcontroller families. It is therefore recommended to keep ST-LINK/V2-1 firmware up to
date. The latest version is available at www.st.com. ST-LINK/V2-1 supports a mechanism
that allows programming its dedicated MCU via the USB interface on the hosting board,
here 32F469IDISCOVERY. The whole process is controlled from a Windows®PC
application also available at www.st.com.
4.2 Power supply
4.2.1 Power supply sources
The 32F469IDISCOVERY board is designed to be powered by the following sources:
•5 V DC from the ST-LINK/V2-1 USB connector CN1 with 500 mA current limitation.
Power mechanism of the board supplied by the USB ST-LINK/V2-1 is explained below
(Section 4.2.2: Supplying the board through ST-LINK/V2-1 USB port). Pins 3 and 4 of
jumper JP2 must be closed by placing a jumper in location called STLK on the
silkscreen of the board. Jumper JP5 must be closed.The red LED LD5 lights up to
confirm the presence of +5 V voltage.
•5 V DC from the user USB FS connector CN13. Pins 5 and 6 of jumper JP2 must be
closed by placing a jumper in location called USB on the silkscreen of the board.
Jumper JP5 must be closed. The red LED LD5 lights up to confirm the presence of
+5 V voltage.
•6 V to 9 V DC from VIN pin of ARDUINO®compatible connector CN6. The voltage
must be limited to 9 V to keep the temperature of the regulator U10 within its thermal
safe area. Pins 1 and 2 of jumper JP2 must be closed by placing a jumper in location
called E5V on the silkscreen of the board. Jumper JP5 must be closed. The red LED
LD5 lights up to confirm the presence of +5 V voltage.
In case VIN, +5V is used to power the board, this power source must comply with the
standard EN-60950-1: 2006+A11/2009, and must be Safety Extra Low Voltage (SELV) with
limited power capability.
4.2.2 Supplying the board through ST-LINK/V2-1 USB port
To power the 32F469IDISCOVERY board in this way, the USB host (a PC) gets connected
with the 32F469IDISCOVERY board via a USB cable to the ST-LINK/V2-1 connector.
In the first step, only the ST-LINK part U3 is powered by the PC. In fact, before USB
enumeration, the host PC provides only 100 mA to the board at that time. The
32F469IDISCOVERY board requests a 500 mA power to the host PC. If the host is able to
provide the required power, the enumeration finishes by a “SetConfiguration” command and
then, the power switch ST890 U4 is switched ON, the red LED LD5 is turned ON, thus the
board can consume no more than 500 mA. If the host is not able to provide such requested
current, the enumeration fails. Therefore the ST890 U4 remains OFF and the board is not
powered. As a consequence, the red LED LD5 remains turned OFF. In this case, it is
mandatory to use another power supply source.

UM1932 Rev 4 13/31
UM1932 Hardware layout and configuration
30
To do this, it is important to power the board before connecting it with the host PC, which
requires the following sequence to be respected:
1. Set the jumper in JP2 header in E5V position.
2. Connect an external power source to VIN pin 8 of ARDUINO®connector CN6.
3. Check the red LED LD5 is turned on.
4. Connect host PC to USB connector CN1.
The ST890 power switch protects the USB port of the host against current demand
exceeding 600 mA, should a short-circuit occur on the board.
The 32F469IDISCOVERY board can also be supplied from a USB power source not
supporting enumeration, such as a USB charger. In this particular case, the solder bridge
SB16 must be closed. ST-LINK/V2-1 turns the ST890 power switch U4 ON regardless of
enumeration procedure result and passes the power unconditionally to the board.
4.2.3 Measurement of current IDD drawn by the STM32F469NI
The jumper JP5 should be closed (default) to supply the STM32F469NI MCU. To measure
the current IDD drawn by the microcontroller STM32F469NIH6 only, remove jumper JP5 and
replace it by a multimeter.
4.2.4 Power related jumpers
The power supply is configured by setting the related jumpers JP2, JP5 and solder bridge
SB8 as described in Table 3: Power related jumpers.
Table 3. Power related jumpers
Jumper,
solder bridge Description
JP5
JP5 IDD is used to measure STM32 current consumption manually by multimeter.
Default setting: Closed by a jumper
SB8
By default SB8 is closed to power +3V3 from regulator U7.
If the board is powered by the pin 1 of extension connector CN12 or by the pin 4 of
the ARDUINO®connector CN6, it is mandatory to open SB8 to avoid reverse
current injection in regulator U7.
(Default setting): SB8 closed
JP2
JP2 is used to select one of the five possible power supply sources.
To supply the board from the ST-LINK/V2-1 USB connector CN1, JP2 should be set
as shown to the right:
(Default Setting)

Hardware layout and configuration UM1932
14/31 UM1932 Rev 4
4.3 Clock source
4.3.1 HSE clock source
By default the HSE clock source of the STM32F469NIH6 is the 8 MHz crystal X2. In that
case, zero-ohm R131 is soldered, solder bridge SB19 is open.
It is possible to replace the crystal X2 by the 8 MHz output MCO from the circuit
ST-LINK/V2-1 U3. In that case, 100-ohm resistor R35 must be soldered, zero-ohm R131
must be removed, solder bridge SB19 must be closed. C26 is not necessary and remains
not populated.
4.3.2 LSE clock source
The 32.768 kHz crystal X3 is the clock source for the embedded RTC.
4.4 Reset source
The reset signal of 32F469IDISCOVERY board is low active and the reset sources include:
•Reset button B1, providing solder bridge SB1 is closed (default setting)
•Embedded ST-LINK/V2-1, providing solder bridge SB2 is closed (default setting)
•ARDUINO®compatible connector CN6 pin 3
•Extension connector CN12 pin 4
JP2
To supply the board from the User USB FS connector USB connector CN13, JP2
should be set as shown to the right:
To supply the board from the pin 8 VIN of the ARDUINO®compatible connector
CN6, JP2 should be set as shown to the right:
To supply the board from pin1 of extension connector CN12 or from pin4 of the
ARDUINO®compatible connector CN6, JP2 should be set as shown to the right (no
jumper):
Table 3. Power related jumpers (continued)
Jumper,
solder bridge Description

UM1932 Rev 4 15/31
UM1932 Hardware layout and configuration
30
4.5 Audio outputs
An audio DAC outputs the audio to a stereo headphone jack connector.
The digital audio interface SAI of STM32F469NIH6 is connected to the digital audio input
SDIN of the audio DAC. The STM32F469NIH6 controls the audio DAC via the I2C2 bus.
Note that the I2C speed of the audio DAC is 100 kHz max.
The PWM loudspeaker output SPKR_OUTA of the audio DAC is available at pins 15 and 16
of the extension connector CN12. Each of the two terminals of the external loudspeaker
must be connected to pins 15 and 16 of CN2 respectively. Ensure that the terminals of the
loudspeaker are not connected to the ground.
The port PE3 of STM32F469NIH6 enables the jack headphone output and/or the
loudspeaker SPKR_OUT. Providing the audio DAC registers are properly set, it allows the
power down of the loudspeaker and/or headphone outputs.
The I2C address of the audio DAC is 0x94.
4.6 Digital microphones
Three STMicroelectronics MEMS digital microphones are available on the
32F469IDISCOVERY Discovery board. Two microphones can be used simultaneously in
stereo mode using the PDM mode. By default, microphones U2 and U6 are used and
connected to the DFSDM of the STM32F469NI microcontroller (solder bridges SB17
opened, and SB18 closed). The PDM clock is generated at port PD13 while PDM data are
received by the microcontroller at port PD6.
Instead of using the pair of microphones U2 and U6, it is possible to use the pair of
microphones U2 and U1. To enable this possibility the solder bridge SB17 must be closed
and SB18 opened.
Solder bridges locations are shown in Figure 4: 32F469IDISCOVERY top side layout.
4.7 USB OTG FS
An USB OTG full speed communication is available at connector CN13.
The 32F469IDISCOVERY Discovery board can be powered by the 5 V DC of this USB OTG
FS connection. When the 32F469IDISCOVERY is USB host, it supplies the USB peripheral.
In this case the board must be supplied by any of the following sources: ST-LINK/V2-1 USB
connector CN1 or pin VIN of ARDUINO®connector CN6. Refer to Section 4.2: Power
supply for more details on each supply source.
The green LED LD8 lights up in one of these cases:
•32F469IDISCOVERY works as a USB host and power switch U16 is switched ON.
•VBUS is powered by another USB host when 32F469IDISCOVERY works as a USB
device.
Red LED LD9 lights up when over-current occurs.

Hardware layout and configuration UM1932
16/31 UM1932 Rev 4
4.8 microSD™ card
A microSD™ card with a capacity of 4 GBytes or more can be inserted in the receptacle
CN9. 4 bits of the SDIO interface of the STM32F469NIH6 are used to communicate with the
microSD™ card. The card detection is read by the GPIO PG2: when a microSD™ card is
inserted, the logic level is 0, otherwise it is 1.
4.9 SDRAM
A 128-Mbit SDRAM is accessible with the FMC interface of the microcontroller
STM32F469NIH6. The data bus is 32-bit wide.
The SDRAM is composed of four banks of 32 Mbits selected by the address bits A14 and
A15.
Each of the four banks is organized as 4096 rows by 256 columns by 32 bits. Raw and
column addresses are pre-selected using the CAS and RAS signals of the FMC bus.
The SDRAM is selected by SDNE0 and can be addressed from 0xC000 0000 to
0xC0FF FFFF.
4.10 Quad-SPI NOR flash memory
A 128-Mbit Quad-SPI NOR flash memory is connected to Quad-SPI interface of the
STM32F469NIH6 microcontroller.
4.11 Virtual COM port
The serial interface USART3 is directly available as a virtual COM port of the PC connected
to the ST-LINK/V2-1 USB connector CN1. The virtual COM port settings are configured as:
115200 b/s, 8 bits data, no parity, 1 stop bit, no flow control.
4.12 ARDUINO®connectors
CN5, CN6, CN7 and CN8 are female connectors compatible with the ARDUINO®standard.
Most shields designed for ARDUINO®Uno V3 can fit to the 32F469IDISCOVERY Discovery
board.
Caution: The STM32 microcontroller I/Os are 3.3 V compatible while ARDUINO®Uno boards are 5 V
compatible.
Table 4. ARDUINO®compatible connectors
Connector Pin Pin name MCU Pin Function
LEFT connectors
CN6 Power
1 - - Not connected
2 IOREF - 3.3V Ref
3 NRST NRST Reset
4 +3V3 - +3.3V input/output(1)

UM1932 Rev 4 17/31
UM1932 Hardware layout and configuration
30
CN6 Power
5 +5V - +5V output
6GND -Ground
7GND -Ground
8 VIN - +6V to +9V power input(2)
CN8 Analog
1 A0 PB1 ADC12_IN9
2 A1 PC2 ADC12_IN12
3 A2 PC3 ADC12_IN13
4 A3 PC4 ADC12_IN14
5 A4 PC5 or PB9(3) ADC12_IN15 or I2C1_SDA(3)
6 A5 PA4 or PB8(3) ADC12_IN4 or I2C1_SCL(3)
1. Before using pin4 of CN6 as +3.3V input, the solder bridge SB8 must be removed. Otherwise
the board 32F469IDISCOVERY could be damaged by the over-current.
2. The external voltage applied to pin VIN must be in the range from 6 V to 9 V at 25°C ambient
temperature. If a higher voltage is applied the regulator U10 may overheat and could be
damaged.
3. By default pin 5 and pin 6 of connector CN8 are PC5 and PA4 respectively. They are enabled
by the default configuration of solder bridges: SB10 and SB12 closed, SB9 and SB11 opened.
If necessary to have an I2C interface on pins 5 and 6 of connector CN8, change the
configuration solder bridges: open SB10 and SB12, close SB9 and SB11.
Table 5. ARDUINO®compatible connectors
Function MCU Pin Pin name Pin Connector
RIGHT connectors
I2C1_SCL PB8 D15 10
CN5 Digital
I2C1_SDA PB9 D14 9
AVDD - AVDD 8
Ground - GND 7
SPI2_SCK PD3 D13 6
SPI2_MISO PB14 D12 5
TIM12_CH2, SPI2_MOSI PB15 D11 4
TIM12_CH1, SPI2_CS PH6 D10 3
TIM14_CH1 PA7 D9 2
-PG10D81
-PG11D78
CN7 Digital
TIM3_CH1 PA6 D6 7
TIM5_CH3 PA2 D5 6
-PG12D45
TIM5_CH2 PA1 D3 4
Table 4. ARDUINO®compatible connectors (continued)
Connector Pin Pin name MCU Pin Function

Hardware layout and configuration UM1932
18/31 UM1932 Rev 4
4.13 Extension connector CN12
The extension connector CN12 is a 2.54 mm pitch header located at the bottom side of the
32F469IDISCOVERY Discovery board. It is composed of 16 square pins of 0.64 mm
arranged in double row and it is compatible with usual connectors mating with 2.54 mm
headers, having 0.64 mm square posts. Pins 1, 2, 15 and 16 are marked on the silkscreen
of the PCB, pin 1 is signaled by a triangle as shown below:
Figure 7. Extension connector CN12
The extension connector gives access to the following communication buses and features:
•CAN2
•USART6 (TX, RX)
•I2S2
•SPI1
•7 timer channels
•2 ADC inputs
•A 1W monophonic loudspeaker output
•System signals: NRST, MCO1, ANTI-TAMP1
•Power supply: +3V3, GND
The STM32F469NIH6 ports and extension connector pins numbers are detailed in the
following Table 6: Extension connector pinout:
-PG13D23
CN7 DigitalUSART6_TX PG14 D1 2
USART6_RX PG9 D0 1
Table 5. ARDUINO®compatible connectors (continued)
Function MCU Pin Pin name Pin Connector

UM1932 Hardware layout and configuration
UM1932 Rev 4 19/31
Table 6. Extension connector pinout
Extension
connector
pin
12345 6 7 891011121314 15 16
MCU Port - - PA8 NRST PB4 PC6 PA5 PC7 PB5 PB13 PA15 PB12 PC13 PC1 - -
CAN2 - - - - - - - - Rx Tx - Rx - - - -
USART6-----Tx - Rx---- - - - -
I2S2 -----MCK- --CK-WS- SD - -
SPI1 - - - - - - - - MOSI - NSS - - - - -
TIMER - - TIM1_
CH1 -MISO
TIM3/TI
M8_
CH1
SCK
TIM3/
TIM8_
CH2
TIM3_
CH2
TIM1_
CH1N
TIM2_
CH1/2
_ETR
TIM1_
BKIN -- --
ADC ----- -
ADC1/AD
C2_IN5 ----- -
ADC123
_IN11 --
SYSTEM+3V3GNDMCO1NRST- - - -----
ANTI
TAMP1 -Speaker OUTAN
Speaker
OUTAP

Hardware layout and configuration UM1932
20/31 UM1932 Rev 4
4.14 DSI LCD
The LCD module is a 4-inch 800x480 TFT color LCD with capacitive touch panel. The LCD
is connected to the MIPI DSI®interface of the microcontroller STM32F469NIH6 via the
connector CN10. The DSI (Display Serial Interface) is a specification of the MIPI Alliance
standard and defines the physical interface and the protocol used by the STM32F469NIH6
microcontroller to communicate with such LCD module.
The following ports of the microcontroller STM32F469NIH6 are dedicated to the DSI
interface: DSI_D0_N, DSI_D0_P, DSI_CK_N, DSI_CK_P, DSI_D1_N, DSI_D1_P.
In addition to the DSI dedicated ports, the port PH7 of the microcontroller is used to reset
both the DSI LCD module and the capacitive touchscreen controller.
The port PJ2, connected to the LCD signal TE (Tearing Effect) is an input of the
microcontroller to synchronize the write access from the microcontroller with the LCD scan
refresh, to avoid visible artefacts on the display.
LEDK and LEDA signals of the LCD module are the cathode and anode of the backlight
LEDs.
This backlight requires a power supply voltage of typically 25 V generated from the +5 V by
a switching mode boost converter.
By controlling the EN pin of the converter by a low-frequency PWM signal, it is possible to
switch on/off or to dim the backlight intensity of the LCD module. The control of EN can be
done by software or by hardware:
•By default, the EN pin of the converter is controlled by the microcontroller software
through DSI commands and CABC signal generated by the LCD module. For such
default configuration the resistor R117 is soldered, R119 is not soldered.
•The 32F469IDISCOVERY Discovery board offers the option to control the EN pin by
HW through port PA3. In such case, R117 must be removed and R119 soldered.
Table 7. DSI LCD module connector (CN10)
CN10
pin
Signal
name Description MCU pins
involved
1 ID Not connect -
2 GND Ground -
3 CABC Content Adaptive Brightness Control -
4 GND Ground -
5 RESX Reset, active low PH7
6 IOVCC Digital supply voltage +3V3
7 GND Ground -
8 HSSI_D0_N MIPI-DSI data lane 0 negative-end I/O DSI_D0_N
9 NC Not connect -
10 HSSI_D0_P MIPI-DSI data lane 0 positive-end I/O DSI_D0_P
11 GND Ground -
12 HSSI_CLK_N MIPI-DSI clock lane negative-end input DSI_CK_N
13 NC Not connect -