Patent ID: 7453397

Claim:
An arrangement, comprising: a sub-system comprising a satellite positioning system receiver (SPSR) and a radio module, wherein the radio module is communicatively connected to an external interface of the sub-system, and further communicatively directly connected to the SPSR via an internal interface of the sub-system, a microcontroller external to said sub-system and communicatively only connected to the sub-system via the external interface of the sub-system; wherein the SPSR communicates with the radio module via the internal interface, the radio module passes at least part of the communication from the SPSR to the external interface, and wherein communication received from the external interface to the radio module is transmitted to the SPSR via the internal interface, and wherein the radio module comprises a processing unit that controls the radio module using a first subset of commands received from the external interface, and controls the SPSR using a second subset of commands received from the external interface, wherein the first and second subsets have a common format.