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OLIMEX© 2013
A10S-OLinuXino-MICRO user's manual
This slot is typically used for booting the OS, due to the larger capacities of the microSD cards
(compared to SD or MMC cards). It is suggested to have an SD card with a proper Linux/Android
image especially if you have ordered a version of the board without NAND memory. It is also
recommended to use Class 10 (10MByte/sec) card for faster read/write operations, lower class cards
(especially higher capacity ones) might slow down the whole system.
microSD card connector
Pin # Connector signal name
Wire name (processor pin)
1
DAT2/RES
SD0-D2 (J17)
2
CD/DAT3/CS
SD0-D3 (J18)
3
CMD/DI
-
4
VDD
-
5
CLK/SCLK
SD0-CLK(K18)
6
VSS2
-
7
DAT0/DO
SD0-D0(L17)
8
DAT1/RES
SD0-D1(L18)
6.2.2 SD/MMC2 slot
The SD/MMC2 slot is located on the back of the PCB and works with the “physically larger” SD
and MMC cards. The connector was mounted to to popular demand.
Note that by default this connector is not suitable for booting OS. Such support is possible but not
implemented in the official software releases.
SD/MMC card connector
Pin # Connector signal name
Wire name (processor pin)
1
CD/DAT3/CS
SD1-D3 (B14)
2
CMD/DI
SD1-CMD/UART1_TX (A11)
3
VSS1
-
4
VDD
-
5
CLK/SCLK
SD1-CLK/UART1_RX (B12)
6
VSS2
-
7
DAT0/DO
SD1-D0 (A12)
8
DAT1/RES
SD1-D1 (B13)
9
DAT2/RES
SD1-D2 (A13)
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