ST STM32MP257F-EV1 User Manual page 21

Pin
Description
number
3
5
7 SWCLK/JTCK
9
7.6 ™
microSD
7.6.1 Description
The CN1 slot for the microSD
fully compliant with version 6.0 of the SD memory card specifications.
7.6.2 Operating voltage
™
The microSD
STM32MP257F-EV1. The UHS‑I modes (1.8 V) are supported on this Evaluation board.
7.6.3 ™
microSD card interface
™
The microSD
and one card detection signal (uSD_DETECT). The SDMMC1 is a bootable interface.
configuration for the SDIO interface.
I/O
PD9
PE4
PE5
PE0
PE1
PE3
PE2
Figure 11 shows the pinout of the microSD
UM3359 - Rev 2
Signal assignment
GND GND
GND GND
JTCK_SWCLK
GND GND
card
™
card is routed to the STM32MP257FAI3 SDIO port (SDMMC). This interface is
card interface is compatible with 1.8 and 3.3 V. All microSD
card interface is used in the four data lines D[0:3] with one clock (CLK), one command line (CMD),
Table 13. I/O configuration for the SDIO interface
™
Figure 11.
Pin
Description
number
4 SWCLK/JTCK
6 SWDO/JTDO
8
10 RESET
Configuration
PD9 is connected to SD.uSD_DETECT
PE4 is connected to SD.SDMMC1_D0
PE5 is connected to SD.SDMMC1_D1
PE0 is connected to SD.SDMMC1_D2
PE1 is connected to SD.SDMMC1_D3
PE3 is connected to SD.SDMMC1_CLK
PE2 is connected to SD.SDMMC1_CMD
connector CN1.
™
microSD card connector (CN1)
Board functions
Signal assignment
JTCK_SWCLK
JTCK_SWCLK
JTDI JTDI
NRST
™
card types are supported on
Table 13 describes the I/O
UM3359
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