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How can I use SS on SDcard pin with ATMEGA128 ?

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bianchi77

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Guys,

How can connect SS pin on SDCard ?
directly connect to SS pin on ATMEGA128 and set ATMEGA128 as SPI master ?

any ideas ?
thanks
 

As you may Know, SS is Slave Select (Chip Select) . If you have just 1 card in the SPI BUS and you want that the SPI BUS for the card always be active, so just connect this pin to GND. but I recommend you that connect this pin to one General Purpose I/O (GPIO) of AVR and force it to Low voltage by software.

https://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus
 

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