Slave - device, as well as a system with a master - device and a plurality of slave - devices, wherein the slave - devices is assigned a unique address

摘要

Slave - device (14a, 14b, 14a ''– 14d'') with:a storage device (66), in order for the slave - device (14a, 14b, 14a ''– 14d'') a configurable portion (122, 122a – 122d) of a bus address (68) to provide;an output (86) of the slave - device (14a, 14b, 14a ''– 14d'');a circuit arrangement (60, 60 '', 70) which, together with the storage device (66) and the output (86) of the slave - device (14a, 14b, 14a'' – 14d '') is coupled to a state of the output (86) of the slave - device (14a, 14b, 14a'' – 14d '') to determine and to use this state the configurable portion (122, 122a – 122d) as a unique sub-address for the slave - device (14a, 14b, 14a'' – 14d '') to configure if the slave - device (14a, 14b, 14a'' – 14d '') together with at least one another such slave - device (14a, 14b, 14a'' – 14d '') with a serial bus (16) is coupled.the circuit arrangement (60, 60 '', 70) a control circuit arrangement (60, 60'') and a comparator circuit (70) which, between the control circuitry (60, 60 '') and the output (86) of the slave - device (14a, 14b, 14a'' – 14d '') is coupled, wherein the comparator circuit (70) has a comparator circuit consisting of gear, in order to the state of the output (86) of the slave - device (14a, 14b, 14a'' – 14d '') on a first logic level when the output (86) of the slave - device (14a, 14b, 14a'' – 14d '') with an external pull - up - resistor (48) is connected, and on a second logic level when the output (86) of the slave - device (14a, 14b, 14a'' – 14d '') are not provided with an external pull - up - resistor (48) is connected, and wherein said control circuitry (60, 60'') the state of the comparator circuit consisting of gear is determined and the state, in order to achieve the configurable portion (122, 122a – 122d) to configure.