A data processing device is provided. The data processing device includes at least one processor circuit, at least one additional circuit, an accelerator circuit, a first data connection which at least connects the at least one processor circuit to the accelerator circuit and is configured to exchange data between the at least one processor circuit and the accelerator circuit, a second data connection which connects the at least one processor circuit to the at least one additional circuit and is configured to exchange data between the at least one additional circuit and the processor circuit, wherein the first data connection has a higher data rate or a lower latency than the second data connection, and includes an address segment having a first address range, which has at least one first address each for the at least one additional circuit and the accelerator circuit, and a second address range which has at least one second address each for the at least one additional circuit and the accelerator circuit, wherein the data processing device is configured to exchange data using the first data connection when addressing using one of the first addresses, and to exchange data using the second data connection when addressing using one of the second addresses.