SDCard: Standard SD Card Pin Configuration

SD Mode
1 CD/DAT3 Card detect/Data line
2 CMD Command response
3 Vss/Ground
4 Vdd Supply voltage
5 CLK
6 Vss/Ground
7 DAT0 Data line
8 DAT1 Data line
9 DAT2 Data line

SPI Mode

1 Chip select
2 Data in
3 Vss
4 Vd
5 CLK
6 Vss
7 Data out
8 Reserved
9 Reserved