Kontron SMARC-sAT30 - Manual (Page 36)

User’s Guide
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3.2.17 SDMMC Interface for Carrier eMMC
The SMARC sAT30 module supports a 4bit SDMMC interface that may be used with a Carrier based eMMC device. The
SMARC specification provides for an SDMMC data path that may be up to 8 bits wide. Only the lower 4 bits are used in
the sAT30 implementation. EMMC devices that may be used with this interface are required to be able to operate in 1
bit, 4 bit or 8 bit modes. The signaling level is at the Module I/O voltage level of 1.8V.
SDMMC interface signals are exposed on the SMARC sAT30 edge connector as shown below:
SMARC sAT30 Edge finger NVIDIA T30 CPU Net Name Notes
Pin # Pin Name Pin # Pin Name
S26 SDMMC_D0 L27 SDMMC3_DAT0 T3_SDMMC[0]
SDMMC Data
S27 SDMMC_D1 J26 SDMMC3_DAT1 T3_SDMMC[1]
S28 SDMMC_D2 J28 SDMMC3_DAT2 T3_SDMMC[2]
S29 SDMMC_D3 K26 SDMMC3_DAT3 T3_SDMMC[3]
S30 SDMMC_D4 Not used
S31 SDMMC_D5 Not used
S32 SDMMC_D6 Not used
S33 SDMMC_D7 Not used
S35 SDMMC_CK G30 SDMMC3_CLK T3_SDMMC3_CLK SDMMC Clock
S36 SDMMC_CMD J29 SDMMC3_CMD T3_SDMMC3_CMD SDMMC Command
S37 SDMMC_RST# K24 SDMMC3_DAT6 WF_RST#
Reset signal to
Carrier eMMC flash