Kontron KTA55-pITX - Manual (Page 26)

KTD-S0031-E Page 22 Secure Digital I/O and Multimedia Card
KTA55/pITX User's Guide
11 Secure Digital I/O and Multimedia Card
The SDIO/MMC interface provides one microSD card socket (only memory cards available). The controller
supports SDIO revision 2.0 and MMC revision 4.2. In addition the controller supports Extended Capacity SD
Memory Cards (SDXC) up to 2 TByte. The data bus width accounts one or four bits, the SDIO transfer rate can
be up to 50 MHz.
11.1 microSD Card Connector
The microSD card socket is named J2000 (8 pins).
Header Pin Signal Name Function
1 DAT2 Data bit 2
2 CD / DAT3 Card detect / Data bit 3
3 CMD Command line
4 VCC 1) Power +3.3V (programmable)
5 CLK Clock
6 GND Ground
7 DAT0 Data bit 0
1
8 DAT1 Data bit 1
Note: 1) To protect the external power lines of peripheral devices make sure that
- the wires have the right diameter to withstand the maximum available current.
- the enclosure of the peripheral device fulfills the fire-protecting conditions of IEC/EN 60950.