Secure digital format card having two interfaces to communicate with two processors

A secure digital format card device comprising:

• a housing having a secure digital (SD) card format insertable into a socket of a host device;
• a processor within the housing;
• a secure digital input/output (SDIO) interface to the processor;
• a second interface to the processor, the second interface of a different type than the SDIO interface;
• one or more further connections to the processor, the one or more further connections different from the SDIO interface and the second interface;
• a first set of pads at the housing, a subset of the first set of pads for communicating with the processor via the SDIO interface;
• and
• a second set of pads at the housing, a subset of the second set of pads for communicating with the processor via the second interface, and a further subset of the second set of pads for communicating with the processor via the one or more further connections,
• the processor configured to:
• when the housing is inserted into the socket of the host device, enable the subset of the second set of pads to communicate with the processor via the second interface when enable data is received from the host device via the one or more further connections, from the further subset of the second set of pads.