Kontron SMARC Evaluation Carrier - Manual (Page 50)

User’s Guide
50 www.kontron.com
The pin-out used for the eMMC Mezzanine interface is shown in the following table. Per the SMARC specification, the IO
interface may run at either 1.8V or 3.3V. Usually 1.8V is used.
Per the eMMC specification, the data interface may be used in 8 bit, 4 bit or 1 bit modes. If using a 4 bit mode, then
SDMMC_D[5] through SDMMC_D[7] are simply left unconnected.
Pin Number Description Pin Number Description
1 SDMMC_D[7] 2 V_3V3
3 GND 4 V_3V3
5 SDMMC_D[6] 6 GND
7 GND 8 GND
9 SDMMC_D[2] 10 GND
11 GND 12 GND
13 SDMMC_D[1] 14 GND
15 GND 16 GND
17 SDMMC_D[5] 18 GND
19 GND 20 GND
21 SDMMC_D[0] 22 GND
23 GND 24 GND
25 SDMMC_D[4] 26 GND
27 GND 28 GND
29 SDMMC_D[3] 30 GND
31 GND 32 GND
33 SDMMC_RST# 34 GND
35 SDMMC_CMD 36 GND
37 NC 38 V_IO (usually 1.8V)
39 SDMMC_CLK 40 V_IO (usually 1.8V)