Sdmmc Interface (Cn20) - ADLINK Technology LEC-BASE MINI Technical Reference

3.6

SDMMC Interface (CN20)

Table 3-5 lists the pin signals of the SD Card ground plane socket, which provides 60-pins, 2
rows, odd/even pin sequence (1, 2) with 0.50mm pitch. These signals are connected to the SD/
eMMC interface at pins S26 through S36 of the SMARC connector over a 3.3 volt level shifter.
Pin #
1 GND
2 GND
3 MMC_D0
4 GND
5 GND
6 GND
7 GND
8 GND
9 MMC_D1
10 GND
11 GND
12 GND
13 GND
14 GND
15 MMC_D2
16 GND
17 GND
18 GND
19 GND
20 GND
21 MMC_D3
22 VDD_3V3
23 GND
24 GND
25 GND
26 GND
27 MMC_D4
28 VDD_3V3
29 GND
30 GND
31 GND
32 GND
33 MMC_D5
34 GND
35 GND
36 GND
37 GND
38 GND
39 MMC_D6
40 GND
22
Table 3-5: SD/eMMC Interface Signals (CN20)
Signal
Ground
Ground
MMC data bit0
Ground
Ground
Ground
Ground
Ground
MMC data bit1
Ground
Ground
Ground
Ground
Ground
MMC data bit2
Ground
Ground
Ground
Ground
Ground
MMC data bit3
3.3 Volt power supply
Ground
Ground
Ground
Ground
MMC data bit4
Ground
Ground
Ground
Ground
MMC data bit5
Ground
Ground
Ground
Ground
Ground
MMC data bit6
Ground
Description
Interfaces