Sd/Mmc Slot; Uext Module - OLIMEX STM32-H407 User Manual

OLIMEX© 2018

6.2 SD/MMC slot

The microSD card slot is a standard 8pin connector.
We have tested a number of microSD cards on the STM32-H407 boards and all of them worked
fine regardless manufacturer or capacity. However, keep in mind that some of the lower quality
microSD cards might draw too much current from the slot which might cause power-state problems.
If you suspect the microSD card is causing problems please try using another one of better quality
for better results.
microSD card connector
Pin #
1
2
3
4
5
6
7
8
Notice that the pad numeration is written at the bottom of STM32-H407 under the microSD card
connector.
When removing the card, please make sure that you release it from the connector by pushing and
NOT by pulling the card directly (this can damage both the connector and the microSD card).

6.3 UEXT module

STM32-H407 board has UEXT connector and can interface Olimex's UEXT modules.
For more information on UEXT please visit:
https://www.olimex.com/Products/Modules/UEXT/
Pin # Wire Name
1
2
3 PC6/USART6_TX
4 PC7/USART6_RX
5 PB8/I2C1_SCL
6 PB9/I2C1_SDA
Signal Name
DAT2/RES
CD/DAT3/CS
CMD/DI
VDD
SCL/SCLK
VSS
DAT0/RES
DAT1/RES
UEXT connector
3.3V
GND
Microcontroller port
-
-
PC6
PC7
PB8
PB9
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STM32-H407 user's manual