A first device operative to use a wake up loop to establish a contactless communications link with a second device, the first device comprising: a first contactless communications transmitter unit (CCTU) comprising: a first plurality of pins; first circuitry operative to execute a CCTU state machine that tracks a state of the first CCTU during the establishment of the contactless communications link; and a first transducer for transmitting extremely high frequency contactless signals to a counterpart contactless communications receiver unit (CCRU) in the second device; and a first contactless communication receiver unit (CCRU) comprising: a second plurality of pins, wherein a first pin of the second plurality is electrically coupled to a first pin of the first plurality via a wired path to enable the first CCRU to communicate with the first CCTU; and a second transducer for receiving EHF contactless signals from a counterpart CCTU associated with the second device; and second circuitry operative to: execute a CCRU state machine that tracks a state of the first CCRU during the establishment of the contactless communications link, wherein the CCRU state machine transitions through a plurality of states in response to signals received by the second transducer; and selectively drive a signal on the first pin used to communicate with the first CCTU in response to a state transition; wherein the CCTU state machine transitions through a plurality of states in response to signals received at the first pin; wherein the first circuitry is operative to selectively transmit EHF signals, using the first transducer, to the counterpart CCRU in response to a state transition; and wherein the wake up loop comprises the first CCRU, the first CCTU, the counterpart CCTU, and the counterpart CCRU. a first contactless communications transmitter unit (CCTU) comprising: a first plurality of pins; first circuitry operative to execute a CCTU state machine that tracks a state of the first CCTU during the establishment of the contactless communications link; and a first transducer for transmitting extremely high frequency contactless signals to a counterpart contactless communications receiver unit (CCRU) in the second device; and a first plurality of pins; first circuitry operative to execute a CCTU state machine that tracks a state of the first CCTU during the establishment of the contactless communications link; and a first transducer for transmitting extremely high frequency contactless signals to a counterpart contactless communications receiver unit (CCRU) in the second device; and a first contactless communication receiver unit (CCRU) comprising: a second plurality of pins, wherein a first pin of the second plurality is electrically coupled to a first pin of the first plurality via a wired path to enable the first CCRU to communicate with the first CCTU; and a second transducer for receiving EHF contactless signals from a counterpart CCTU associated with the second device; and second circuitry operative to: execute a CCRU state machine that tracks a state of the first CCRU during the establishment of the contactless communications link, wherein the CCRU state machine transitions through a plurality of states in response to signals received by the second transducer; and selectively drive a signal on the first pin used to communicate with the first CCTU in response to a state transition; a second plurality of pins, wherein a first pin of the second plurality is electrically coupled to a first pin of the first plurality via a wired path to enable the first CCRU to communicate with the first CCTU; and a second transducer for receiving EHF contactless signals from a counterpart CCTU associated with the second device; and second circuitry operative to: execute a CCRU state machine that tracks a state of the first CCRU during the establishment of the contactless communications link, wherein the CCRU state machine transitions through a plurality of states in response to signals received by the second transducer; and selectively drive a signal on the first pin used to communicate with the first CCTU in response to a state transition; execute a CCRU state machine that tracks a state of the first CCRU during the establishment of the contactless communications link, wherein the CCRU state machine transitions through a plurality of states in response to signals received by the second transducer; and selectively drive a signal on the first pin used to communicate with the first CCTU in response to a state transition; wherein the CCTU state machine transitions through a plurality of states in response to signals received at the first pin; wherein the first circuitry is operative to selectively transmit EHF signals, using the first transducer, to the counterpart CCRU in response to a state transition; and wherein the wake up loop comprises the first CCRU, the first CCTU, the counterpart CCTU, and the counterpart CCRU.