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SD Card卡

Watrt7年前 (2019-04-20)硬件接口30530

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


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