Installation Instructions

SIM5216A _HD_V1.02 Hardware Design
SIM5216A _HD_V1.02 26.08.2010
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Figure 27： MMC/SD interface
As mentioned, the MMC/SD interface supports SD according to the SD physical layer
specification 2.0, up to 4-bit data mode. It is also capable of supporting 1-bit MMC according to
MCC specification 3.31. While the same hardware controller is used, the initialization for SD
cards and MMCs are different. SIM5216A will auto-detect which card is inserted (SD or MMC,
or no card) and will proceed accordingly.
Table 25: MMC/SD pin of SIM5216A
voltage scope( V )
Name
Direction
Pin
On board-to-board connector
Min Type Max
SD_DATA0
Input /Output
36 2.7 2.85 3.0
SD_DATA1
Input /Output
37 2.7 2.85 3.0
SD_DATA2
Input /Output
38 2.7 2.85 3.0
SD_DATA3
Input /Output
39 2.7 2.85 3.0
SD_CLK
Output
34 2.7 2.85 3.0
SD_CMD Output 35 2.7 2.85 3.0
VREG_AUX Output 40 2.7 2.85 3.0
Table 26 : MMC/SD pin connector
Name SD card MMC card
SD_DATA0 SD_DATA0 MMC_data
SD_DATA1 SD_DATA1 NC
SD_DATA2 SD_DATA2 NC