Abstract: An interface monitoring apparatus for an interface port for connecting a peripheral device to an interface chip by at least one first data line includes a capacitive element arranged between the interface chip and the interface port and which capacitively couples the first data line to the interface chip, a first monitoring circuit coupled to the first data line at the interface port and which monitors at least one device-end termination of the first data line and provides a first control signal in the event of it being identified that a termination for the first data line is not present, and a first deactivation circuit that permanently stops data traffic via the first data line of the interface port until the interface monitoring apparatus is reset when the first control signal has been provided by the first monitoring circuit.

Abstract: An interface monitoring apparatus for an interface port for connecting a peripheral device to an interface chip by at least one first data line includes a capacitive element arranged between the interface chip and the interface port and which capacitively couples the first data line to the interface chip, a first monitoring circuit coupled to the first data line at the interface port and which monitors at least one device-end termination of the first data line and provides a first control signal in the event of it being identified that a termination for the first data line is not present, and a first deactivation circuit that permanently stops data traffic via the first data line of the interface port until the interface monitoring apparatus is reset when the first control signal has been provided by the first monitoring circuit.

Abstract: An energy-saving circuit applies to a peripheral device for connection to a data bus of a host system. The energy-saving circuit includes a monitoring circuit for monitoring a communication via the data bus, a holding circuit for holding a connection state of the peripheral device, at least one switching element for interrupting a supply voltage for the peripheral device, and a control circuit. The control circuit is set up to recognize by means of the monitoring circuit the beginning of an idle state of the data bus, to hold the connection state of the peripheral device by activation of the holding circuit upon recognition of the idle state, and to interrupt the feeding of a supply voltage for the peripheral device by opening the at least one switching element.

Abstract: An interface monitoring device can be used with at least one differential interface port with a positive and a negative data line for connecting a peripheral device. The interface monitoring device has a monitoring circuit and a deactivation circuit. The monitoring circuit is designed to monitor at least one signal level dependent on the signal level of the positive and/or the negative data line and the deactivation circuit is designed to stop data traffic via the positive and/or the negative data line of the at least one interface port.

Abstract: An energy-saving circuit applies to a peripheral device for connection to a data bus of a host system. The energy-saving circuit includes a monitoring circuit for monitoring a communication via the data bus, a holding circuit for holding a connection state of the peripheral device, at least one switching element for interrupting a supply voltage for the peripheral device, and a control circuit. The control circuit is set up to recognize by means of the monitoring circuit the beginning of an idle state of the data bus, to hold the connection state of the peripheral device by activation of the holding circuit upon recognition of the idle state, and to interrupt the feeding of a supply voltage for the peripheral device by opening the at least one switching element.

Abstract: An interface monitoring device can be used with at least one differential interface port with a positive and a negative data line for connecting a peripheral device. The interface monitoring device has a monitoring circuit and a deactivation circuit. The monitoring circuit is designed to monitor at least one signal level dependent on the signal level of the positive and/or the negative data line and the deactivation circuit is designed to stop data traffic via the positive and/or the negative data line of the at least one interface port.