Remote transmission badge for e.g. accessing protected zone, has alarm module operating microprocessor according to low consumption sleep mode and high consumption awake mode and arranged between receiver and microprocessor

摘要

The badge (42) has a receiver (46) for receiving radio signals, and a microprocessor (44) including an alarm module (56) and processing the radio signals. The alarm module operates the microprocessor according to a low consumption sleep mode and a high consumption awake mode. The alarm module is arranged between the receiver and the microprocessor. The module detects binary data frames conformed to a predetermined frame reference and alarms the microprocessor, when the signals are conformed to the reference.