1. A wireless communication apparatus comprising: a wireless processing unit that performs wireless communication; and an application processing unit that executes an application, wherein the wireless processing unit comprises: an update detecting unit that detects reception of wireless function update information for updating a function of the wireless processing unit when update information for updating any function of the wireless communication apparatus is received; and an update processing unit that updates the function of the wireless processing unit, if the reception of wireless function update information is detected by the update detecting unit, by performing an update process specified in the wireless function update information without involving the application processing unit.