System on a chip, comprising an interconnect circuit (ICN) including at least one input interface (IEi) and multiple output interfaces (ISj), at least one source device (ESi) coupled to said input interface, at least one target device (EC) having a sectorised addressable space and multiple access ports (PA0-PA2) respectively coupled to said output interfaces, said at least one source device being configured to deliver transactions (Ti) containing address words to said at least one target device (EC), and at least one programmable control module (MCMi) coupled to said at least one source device and including a table (TBi) configured, once the control module has been programmed, to indicate for each sector of said addressable space one of the access ports, as well as a control circuit (CCMi), able, in the presence of each transaction originating from said at least one source device, to deliver to the interconnect circuit a control word (MCi) designating the access port indicated in the table in consideration of the address word contained in said transaction, the interconnect circuit (ICN) then being configured to route said transaction from said at least one input interface to the output interface coupled to this access port jointly with the control word (MCi) and to deliver said transaction to said access port, the output interface being configured to not deliver the control word to the access port, the content of each transaction delivered to an access port being identical to the content of the corresponding transaction delivered by the source device regardless of the access port selected. an interconnect circuit (ICN) including at least one input interface (IEi) and multiple output interfaces (ISj), at least one source device (ESi) coupled to said input interface, at least one target device (EC) having a sectorised addressable space and multiple access ports (PA0-PA2) respectively coupled to said output interfaces, said at least one source device being configured to deliver transactions (Ti) containing address words to said at least one target device (EC), and at least one programmable control module (MCMi) coupled to said at least one source device and including a table (TBi) configured, once the control module has been programmed, to indicate for each sector of said addressable space one of the access ports, as well as a control circuit (CCMi), able, in the presence of each transaction originating from said at least one source device, to deliver to the interconnect circuit a control word (MCi) designating the access port indicated in the table in consideration of the address word contained in said transaction, the interconnect circuit (ICN) then being configured to route said transaction from said at least one input interface to the output interface coupled to this access port jointly with the control word (MCi) and to deliver said transaction to said access port, the output interface being configured to not deliver the control word to the access port, the content of each transaction delivered to an access port being identical to the content of the corresponding transaction delivered by the source device regardless of the access port selected. <EOS>