Hardware Development Guide of Module Product
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33
MF206A
55
VREG_MMC
SD card power
3V
3.6.2
Electric Feature
SDCC_CLK: Clock signal, host2device, default is 0~25MHz.
SDCC_CMD: Command/response, two-way: the command can be sent from the host to a single card/all cards,
the response is sent from a single card/all cards to the host.
SDCC_DATA[3..0]: Data cable, two-way, default is 0~12.5MB/sec.
3.6.3
Application of SD Card Interface
Figure 3–3 is the reference design diagram for the SD interface. The detection of SD card adopts the polling
mode of DATA3 signal cable to judge whether T card is inserted or not.
Figure 3–3 SD Typical Application Circuit