p p m m o o d d s s d d ? ? r r e e f f e e r r e e n n c c e e m m a a n n u u a a l l revision: december 18, 2009 note: this document applies to rev b of the board. 215 e main suite d | pullman, wa 99163 (509) 334 6306 voice and fax doc: 502-123 page 1 of 1 copyright digilent, inc. all rights reserved. other product and company names mentioned may be tradema rks of their respective owners. overview the pmodsd secure digital memory card module provides a convenient sd card slot for use with digilent system and microcontroller boards. features include: ? a 2x6 pin header ? an sd card slot functional description the pmodsd connects to all communication and power signals from a standard sd card and brings them out to the 2x6 pin header on the board. the pinout placement on the pmodsd is designed to readily communicate with a digilent system board via spi. the spi interface standard uses four signal lines: ss (slave select), mosi (master out slave in), miso (master in slave out), and sck (serial clock). sd cards can also be driven in a native mode that also uses the dat1 and dat2 signals as well as the dat0, dat3, cmd, and clk signals. the wp signal can be set by a switch on the sd card to prevent the host from writing or erasing data on the card. the cd signal can be used by the host to indicate that a card is in the sd slot and is detectable. for more information on the necessary commands to communicate with an sd card, see the card?s data sheet. sd card slot 1 ss cs/dat3 2 mosi di/cmd 3 miso do/dat0 4 sck clk 7 dat1 dat1 8 dat2 dat2 9 cd cd 10 wp wp 5 gnd vssi 6 vcc vdd 11 gnd vssi 12 vcc vdd
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