Table 51.
microSD
™
connector CN3
Pin number
Description
Pin number
Description
1
SD_DATA2 (PG11)
6
VSS/GND
2
SD_DATA3 (PG12)
7
SD_DATA0 (PG9)
3
SD_CMD (PD7)
8
SD_DATA1 (PG10)
4
3V3_SW
9
GND
5
SD_CLK (PD6)
10
Micro SDcard_detect (PI11)
8.4
USB OTG HS
8.4.1
Description
STM32H7B3I-EVAL Evaluation board supports USB OTG high-speed communication via a USB Micro-AB
connector CN8, and a USB high-speed PHY U7, connected to STM32H7B3LIH6QU ULPI bus for high-speed
function.
USB high-speed PHY (U7) RESETB pin is connected to MFX_GPO5 signal, and can also be connected to NRST
if needed by removing SB31 and fitting SB13.
USB high-speed PHY (U7) REFCLK pin is connected to an external 24 MHz oscillator (X3).
The STM32H7B3I-EVAL Evaluation board can be powered by this USB connector (CN8) at 5V DC with 500mA
current limitation.
A USB power switch (U39) is also connected to V
BUS
and provides power to CN8 (with SB11 closed). U39 can be
enabled with CPEN from U7 with SB12 fitted. It can also be controlled by an MFX GPIO (MFX_GPO4).
Green LED LD6 for CN8 is lit when either:
•
The power switch (U39) is ON and STM32H7B3I-EVAL works as a USB host.
•
V
BUS
is powered by another USB host when STM32H7B3I-EVAL works as a USB device.
Red LED LD5 is lit when over-current occurs (IV
BUS
> 500 mA).
Note:
STM32H7B3I-EVAL Evaluation board must be powered by an external power supply when using the OTG
function.
8.4.2
Operating voltage
STM32H7B3LIH6QU ULPI interface can only be at 3.3 V on this board. USB OTG HS external PHY requires the
following power supplies:
•
5 V for VBAT pin
•
3.3 V for VDDIO pin
•
1.8 V for VDD_1V8 pins
8.4.3
Limitations and hardware configuration
Limitations with primary functions: camera, I2S6, and DFSDM
UM2662
USB OTG HS
UM2662
-
Rev 1
page 56/95
