Reply To: Free PINS on the Cyclone iv in OSSC V1.5?

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#26115
renegadeandy
Participant

Hi again

So the SD card functionality uses SPI — which uses 4 signals:

SCLK
MOSI
MISO
SS

Is that correct? Can you help me locate those pin numbers?

I see in the Pin editor:

SD_CLK
SD_CMD
SD_DAT[3]
SD_DAT[2]
SD_DAT[1]
SD_DAT[0]

— how do those tie up the SPI spec?