EMTRION emSBC-Argon, Руководство по оборудованию

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Hardware Manual: emSTAMP- emSBC-Argon (Rev1)
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6.2 microSD-Card socket
A microSD-Card socket J6 is available on the emSBC-Argon. The socket J6 is connected to the
SDMMC1 interface of the STM32MP157 processor via an integrated EMI-filter and TVS diodes array.
An active-low card-detect signal of the microSD-Card socket is available but there is no write
protection.
The microSD-Card socket can be used as boot-device. Please refer to the chapter 6.11 “Boot
configuration DIP-Switch” for more information how to set the appropriate boot-configuration.
If the SDMMC1 interface needs to be available on the RPi-extension connector, these resistors need
to be removed to avoid signal reflections caused by wire stubs.
6.2.1 Pinout of microSD-Card connector J6
Pin Signal
CPU Pin
Name Module
Pin
1 SDMMC1_D2 PC10 58
2 SDMMC1_D3 PC11 57
3 SDMMC1_CMD PD2 61
4 VDD_SD
5 SDMMC1_CK PC12 62
6 GND
7 SDMMC1_D0 PC8 60
8 SDMMC1_D1 PC9 59
9 SDMMC1_CD# PB7 56
10 GND
Note:
The SDMMC1 interface of the STM32MP157 is shared between the MicroSD-Card socket and
the 40-pin RPi-extension connector J13. As default the SDMMC1 interface is connected to the
microSD-Card socket via the 0R-resistors R66, R67, R68, R70, R71 and R72.