Selective RF device activation
Systems and methods for activating one or more devices are disclosed. According to one embodiment, the device listens for an activate code, the activate code having a length field and a mask field, the mask field including a mask value, the length field specifying a length of the mask field to a final bit of the mask value. Upon receiving the activate code, the length field is compared to a stored length value for determining whether the length field meets a predefined criterion. If the length field meets the predefined criterion, an address of the activate value is loaded (if an address field is present) and the appropriate bits (mask value) of the mask field are compared to a stored activate value. An activate signal is generated if the mask value matches the stored activate value. The activate signal can be used to activate additional circuitry including the entire device.
1. A method for activating a device, comprising:
listening for an activate code; receiving the activate code, the activate code having a length field and a mask field, the mask field including a mask value, the length field specifying a length of the mask field to a final bit of the mask value; comparing the length field to a stored length value for determining whether the length field meets a predefined criterion; comparing the mask value in the mask field to a stored activate value if the length field meets the predefined criterion; and activating additional circuitry if the mask value matches the stored activate value,
wherein the predefined criterion is that a value of the length field is greater than the stored length value.
2. A method for activating a device, comprising:
listening for an activate code; receiving the activate code, the activate code having a length field and a mask field, the mask field including a mask value, the length field specifying a length of the mask field to a final bit of the mask value; comparing the length field to a stored length value for determining whether the length field meets a predefined criterion; comparing the mask value in the mask field to a stored activate value if the length field meets the predefined criterion; and activating additional circuitry if the mask value matches the stored activate value,
wherein the predefined criterion is that the length field is no greater than the stored length value.