6 Hardware layout and configuration
The STM32H7B3I-EVAL Evaluation board is designed around the STM32H7B3LIH6QU target microcontroller.
Figure 2 illustrates STM32H7B3LIH6QU connections with peripheral components.
Figure 2. Hardware block diagram
3V3 Power Supply
(3V3_AO)
LED, push-button, and wake-up
External USB 
HS PHY
MIcro-AB 
USB 
connector
Wi-Fi
®
 module
GPIOs
OTG HS (ULPI)
OTG FS
UART + SPI + 
GPIOs
VCP UART
SWD
VBAT
LSE
LCD
Reset
FMC
SDIO 1
SDIO 2
I2C
SAI1 or I2S6 
and / or 
differential ADC
GPIO, I
2
C, INT
Audio codec
CS42L51-CNZ
3 V battery
32 KHz crystal
RK070ER9427L
RGB - 7 INCH – 
WVGA 
LCD + CTP 
MB1370 module
8 Mx32bit SDRAM
8 Mx16bit NOR Flash
microSD
TM
 
card 2.0 
(3V3)
microSD
TM
 
card 3.0 
(3V3 / 1V8)
STM32L152CCT6
MFX GPIO Expander
Stereo jack 
(line-out)
STM32F723IEK6
STLINK V3.0
Micro-B 
USB 
connector
MB1299 Module
1 Mx16bit SRAM
HSE
24 MHz crystal
Reset button
OCSPI 2
OCSPI 
connector
OCSPI 1
MX25LM51245GXDI00
OCSPI
DFSDM1 and 2
DFSDM
ADC Potentiometer
ADCs, PWMs, 
GPIOs,
DFSDM
Motor-control 
connector
CAN, CAN FD, 
and bootloader 
RS-232
DB9 
connectors
GPIOs
Extension 
connectors
DCMI
Camera 
module 
connector
DFSDM 
connector
MB1242 
OCSPI module
microSD
TM
 
card 
connector
3V3_SW
LDO
3V3_SW
MB1379 
camera module
Micro-AB 
USB 
connector
LCD + 
CTP 
connector
STM32H7B3LIH6QU
VDDMMC
MFX IO0
VDDMMC    
1V8_SW
LDO
1V8_SW
GPIO
MFX IO8  
ON/OFF
ON/OFF
SEL
microSD
TM
 
card 
connector
Note: Interfaces in blue are partially supplied by VDDMMC. Refer to Section  6.3.5  .
UM2662
Hardware layout and configuration
UM2662 - Rev 1
page 7/95