Product manual

Figure 3.13: SD Card in SPI Bus Mode
CS
D0, D1, CLK
CS
D0, D1, CLK
CS
D0, D1, CLK
Microcontroller
SD card
SD card
SD card
Vss
V
dd
Table 3.5: SD Card Pin Assignments
Pin No Name SD Mode SPI Mode
1 CD/DAT3 Card detect/Data line Chip select
2 CMD Command response Data in
3 Vss Ground Ground
4 Vdd Supply voltage Supply voltage
5 CLK Clock Clock
6 Vss Ground Ground
7 DAT0 Data line Data out
8 DAT1 Data line Reserved
9 DAT2 Data line Reserved
120 Chapter 3
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