Package and integrated circuit with interface detection

A package comprising:

• a package terminal;
• and
• an integrated circuit, the integrated circuit comprising:
• a first integrated circuit terminal communicatively coupled to the package terminal;
• a second integrated circuit terminal;
• a first communication protocol engine configured to communicate using a first protocol;
• a second communication protocol engine configured to communicate using a second protocol;
• and
• an interface detector connected to the first integrated circuit terminal and the second integrated circuit terminal, and configured to, when signals are received on at least one of the first or second integrated circuit terminal, determine whether or not the signals represent a portion of a transaction that uses the first protocol, and whether or not the signals represent a portion of a transaction that uses the second protocol, wherein
• the integrated circuit is further configured to permit the first communication protocol engine to communicate in the transaction that uses the first protocol when the interface detector determines that the signals represent the portion of the transaction that uses the first protocol, and
• the integrated circuit is further configured to permit the second communication protocol engine to communicate in the transaction that uses the second protocol when the interface detector determines that the signals represent the portion of the transaction that uses the second protocol.