Kontron KTT20-pITX - Manual (Page 28)

KTD-S0044-G Page 24 Secure Digital and Multimedia Card
KTT20/pITX User's Guide
12 Secure Digital and Multimedia Card
The SD/MMC interface uses only a microSD TM card socket. The controller supports the SD specification revi-
sion 2.0 (implies the SDSC and SDHC families) and the MMC specification revision 4.3. The data bus width
accounts four bits, the SD transfer rate can be up to 50 MHz and MMC rate up to 52 MHz.
12.1 Connector
The microSD TM card socket is named J1401 (8 pins).
Header Pin Signal Description Type
1 DATA2 Data bit 2 IO-33
2 CD / DATA3 Card detect / Data bit 3 IO-33
3 CMD Command line IO-33
4 VCC3 1) Power +3.3V PWR
5 CLK Clock O-33
6 GND Ground PWR
7 DATA0 Data bit 0 IO-33
1
8 DATA1 Data bit 1 IO-33
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.
- to enclosure of the peripheral device fulfills the fire-protecting conditions of IEC/EN 60950.