Soldering a MMC socket, question and doubt

Community PCB Design
1

Hello, i don’t know if the best place for this topic is here.

I’m going to implement a MMC card in my system and i have the following questions.

The MMC card in SPI mode, only requires 7 pins:

  1. CS

  2. DI

  3. VSS

  4. VDD

  5. SCLK

  6. VSS2

  7. DO

If i use a socket like this http://www.sparkfun.com/commerce/produc … cts_id=136 , May I leave disconnected (or what) the following pins?

  1. IRQ

  2. P9 (what does it mean?)

  3. WP (do all MMC cards have write protection?)

  4. CD (card detect)

  5. SW (what does it mean?)

  6. SHIELD (what does it mean? i guess VSS?)

And I’ve read in the documentation ( http://www.samsung.com/global/system/bu … _rev03.pdf ) , the DI and DOUT pins must have a push and a pull resistors, but I haven’t seen that in many designs. Cans somebody confirm that?

Thank you very much in advance.