Pin
number
Description
Pin connection
Pin
number
Description
Pin connection
9
MOTOR_DFSDM1_DATIN0
PC1
10
MOTOR_DFSDM1_DATIN2
PC5
11
MOTOR_DFSDM1_CKIN4
PD6
12
MEMS_LED
/
MOTOR_DFSDM1_CKIN7
PB8
13
MOTOR_DFSDM1_CKIN3
PD8
14
MOTOR_DFSDM1_2_CKIN1
PB13
15
MOTOR_DFSDM1_DATIN4
PE10
16
MOTOR_DFSDM1_CKIN5
PB7
17
MOTOR_DFSDM1_CKIN0
PC0
18
MOTOR_DFSDM1_CKIN2
PC4
19
3V3_AO
3V3_AO
20
GND
GND
1. Pins used by MB1299. See the limitations in
7.3
USB OTG FS
7.3.1
Description
The STM32H7B3I-EVAL Evaluation board supports USB OTG full speed communication via the USB Micro-AB
connector CN27 and the USB power switch U29 connected to V
BUS
. The STM32H7B3I-EVAL Evaluation board
can be powered by this USB connection at 5 V DC with 500 mA current limitation.
A green LED LD11 is lit in one of these cases:
•
Power switch (U29) 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.
The red LED LD10 is lit when overcurrent occurs (I
VBUS
superior to 500 mA).
Note:
The STM32H7B3I-EVAL board must be powered by an external power supply when using the OTG function.
7.3.2
Operating voltage
The STM32H7B3LIH6QU USB OTG FS interface can only be at 3.3 V on this board.
•
In host mode, V
BUS
(5 V) is provided by the U29 power switch.
•
In device mode, V
BUS
(5 V) is provided by an external source connected to CN27.
7.3.3
Limitations and hardware configuration
Limitation with secondary function FDCAN1:
•
As USB FS DP/DM is shared with FDCAN1 RX/TX, SB36 and SB35 must be removed when using USB
OTG FS in order to avoid any stub.
7.3.4
Interface
Table 29.
USB OTG FS Micro-AB connector CN27
Pin number
Description
Pin number
Description
1
VBUS (PA9) (From STMPS2151STR or
to STM32H7B3LIH6QU)
4
ID (PA10)
2
D- (PA11)
5
GND
3
D+ (PA12)
-
-
7.4
microSD™ card 1
7.4.1
Description
An 8 GByte (Or more) Micro SD card connected to SDIO1 3.0 port of STM32H7B3LIH6QU is available on the
board. The microSD
™
card detection is managed by SD_DETECT1 (PF10).
UM2662
USB OTG FS
UM2662
-
Rev 1
page 35/95