PAN1322Application Note 22 Revision 1.2, 2013-12-18Design GuideThe host application that controls eUniStone need to fulfill the control as required by the Accessoryfunctionality. To control the Bluetooth link using eUniStone minimal requirements must be coveredsince the entire Bluetooth stack is included in eUniStone.5.1 AccessoryAn accessory can be any device that connects, sends and/or receives data to and from a remotedevice. The device can be small and portable or part of a bigger system. Typical usages for anaccessory are; Sensor Display Remote control Display with buttons Keypad Handheld terminalThe eUniStone is specially made to support all these types of accessories/applications using the SerialPort Profile (SPP) over Bluetooth.5.1.1 Host ProcessorThe host processor in an accessory, using eUniStone, may be a really light micro-controller, FPGA orsimilar but also e.g. a PC. In the below figure there is an external peripheral control and chip connectedto the host processor, this may be needed depending on the accessory functionality requirements. Foruse in an iPhone application there is a need for an external chip and control functionality.
