1.1 SDIO features
Targeted for portable and stationary applications
Minimal or no modification to SD Physical bus is required
Minimal change to memory driver software
Extended physical form factor available for specialized applications
Plug and play (PnP) support
Multi-function support including multiple I/O and combined I/O and memory
Up to 7 I/O functions plus one memory supported on one card.
Allows card to interrupt host
Initialization Voltage: 2.0 to 3.6V
Operational Voltage range: 3.1 to 3.5V