SD Card


SD/miniSD/microSD pinout

SD mode
PinSignalDescription
1CD/DAT3Card detection / Data Line 3
2CMDCommand Line
3VSSGround
4VDD3.3V Supply (2.7-3.6v)
5CLKClock
6VSSGround
7DAT0Data Line 0
8DAT1Data Line 1
9DAT2Data Line 2
10n.c.Reserved
11n.c.Reserved

SPI mode
PinSignalDescription
1CDChip Select
2DIData Input
3VSSGround
4VDD3.3V Supply (2.7-3.6v)
5SCLKClock
6VSSGround
7DOData Output
8-Unused or IRQ
9-Unused
10n.c.Reserved
11n.c.Reserved

SPI mode is optional on microSD card