I am developing my own shield which will include pins to connect the libellium microSd module.
However, i have a doubt about the pins that it uses. In the SDuFat library developed by arduino Team i found this:
// arduino D10
define SS 2
// arduino D11
define MOSI 3
// arduino D12
define MISO 4
// arduino D13
define SCK 5
what is something that i can read everywhere in this forum.
Moreover, by the use of SPI configuration, the module is connected to 8-14 digital pins with the next functions...
8: power 10: SS 11: MOSI 12: MISO 13: SCK 14: GND
So... what if digital pin 9 for?
The module was also designed to be powered by ICSP, but in this case it only use 6 pins...
For that reason, i assume that when the module is connected by ISP mode (8-14 digital pins) pin 9 in not used at all by the module... could somebody confirm this?
I forget to say that this pin is labeled in the module such as "CD". A hole with the same label also exist in ICSP connexion, bu it is not connected at all... So, could i forget this pin and win one digital pin to connect other devices?. Thanks![/edit]