Microsd ™ Card; Description; Operating Voltage; Microsd ™ Card Interface - ST STM32MP157C-DK2 User Manual

Function STM32 pin
D+ USB_DP2
D- USB_DM2
SBU1
VBUS
RX2-
RX2+
GND
7.9 ™
microSD
7.9.1

Description

The CN15 slot for the microSD
compliant with SD Memory Card Specification Version 3.01: SDR50.
7.9.2

Operating voltage

™
The microSD
card types are supported (including SDHC and SDXC), but only Default and High-Speed modes (3 V) are
supported on STM32MP157A-DK1 and STM32MP157C-DK2. UHS-I modes (1.8 V) are not supported on these
Discovery kits.
7.9.3 ™
microSD card interface
™
The microSD
and one card detection signal (CARD_DETECT).
The SDMMC1 is a bootable interface.
Table 11 describes the I/O configuration for the SDIO interface.
I/O
PB7
PC8
PC9
PC10
PC11
PC12
PD2
Figure 11 shows the pinout of the microSD
UM2534 - Rev 1
Signal name
USB_DP2
USB_DM2
- -
- -
- -
- -
- GND
card
™
card is routed to STM32MP157x SDIO port (SDMMC1). This interface is
card interface is only compatible with the 3.3 V voltage range: from 2.7 V to 3.6 V. All microSD
card interface is used in the four data lines D[0:3] with one clock (CLK), one command line (CMD),
Table 11. I/O configuration for the SDIO interface
PB7 is connected to µSD_DETECT
PC8 is connected to SDMMC1_D0
PC9 is connected to SDMMC1_D1
PC10 is connected to SDMMC1_D2
PC11 is connected to SDMMC1_D3
PC12 is connected to SDMMC1_CLK
PD2 is connected to SDMMC1_CMD
™
Pin Pin
Pin Pin
name name
D+ A6 B7 D-
D- A7 B6 D+
SBU1 A8 B5 CC2
VBUS A9 B4 VBUS
RX2- A10 B3 TX2-
RX2+ A11 B2 TX2+
GND A12 B1 GND
Configuation
connector CN15.
UM2534
microSD™ card
Signal name STM32 pin
USB_DM2 USB_DM2
USB_DP2 USB_DP2
- -
- -
- -
- -
GND -
Function
D-
D+
CC2
VBUS
TX2-
TX2+
GND
™
page 17/47