Detection device for detecting disconnection of crypto ignition key stopper to inter integrated circuit bus, has signal status measurement module generating indicator signal when signal remains at low level longer than predetermined time

摘要

The device (101) has an electrical connection (115) to carry a clock signal. A resistor (117) connected to an electrical ground (119) maintains the signal conveyed by the link to a low potential level when a crypto ignition key stopper (102) is disconnected. The stopper includes a polarized resistor (121) so that the signal reaches a high potential level when the stopper is connected to the device. A signal status measurement module (113) generates an indicator signal when the transported signal remains at the low level longer than a predetermined time. Independent claims are also included for the following: (1) a method for detecting disconnection of a peripheral to a bus (2) a radio communication terminal.