Interfacing a microSD card to a Netburner Nano

[kaquino215]

How do I connect a Nano Netburner to a microSD card? What pin on the Netburner Nano goes to pin DAT3 on the microSD card for example?

[mbrown]

The pin-out should be:
SD card - Nano54415
1. DAT2 - SDHC_D2
2. DAT3 - SDHC_D3
3. CMD - SDHC_CMD
4. VCC - VCC3.3V
5. SCLK - SDHC_CLK
6. GND - GND
7. DAT0 - SDHC_D0
8. DAT1 - SDHC_D1
9. SDCD - SDCD
with various ground pads.

That being said, I don't believe these use the same pins as the SD card on the MOD54415. As far as I know, using this SD card will require writing a driver for the eSDHC module on the mcf5441x to work. If anyone has successfully written one or gotten the SDHC module working, I'd be interested in hearing about their success. Several of our projects would benefit from the speed boost of using the 4 pin SDIO bus instead of the one pin SPI.

[kaquino215]

Thank. What is pin 9, SDCD, is that a ground pad?

[mbrown]

When viewed from below with the Molex connector on the right hand side, the SDCD pad is the bottom left pad. It's a card detect pin tied to a GPIO line for an unused module (sim0_pd) and a resistor to 3.3V power. It is active low, so when the card pushes a lever back, it connects the pad to ground and the processor confirms the card is inserted allowing you to use the effs file system.