Device for transferring data arrays between buses and system for mac layer processing comprising said device

A system for medium access control layer processing comprising a device for real-time data shifting from a read bus to a master bus and vice versa, the device comprising:

• storage means for storing at least two data arrays;
• a first input/output interface for transferring first data arrays in a first direction from the read bus to the storage means and in a second direction from the storage means to the read bus;
• a second input/output interface for transferring second data arrays different from the first data arrays in a third direction from the master bus to the storage means and in a fourth direction from the storage means to the master bus,
• wherein the first interface comprises a means for receiving an instruction word via the first bus during an instruction phase of a master clock cycle,
• said instruction word receiving means being connected to said first interface for passing on first control data derived from said instruction word to said first interface and thereby selecting one of said first and second directions for data transfer during an operand phase of said master clock cycle,
• said instruction word receiving means being connected to said second interface for passing on second control data derived from said instruction word to said second interface and thereby selecting one of said third and fourth directions for data transfer during said operand phase of said master clock cycle,
• the system further comprising a memory different from said storage means for storing data arrays and instruction words which is connected to the first interface by means of the read bus, and at least one input/output peripheral which is connected to the second interface by means of the master bus, said at least one input/output peripheral comprising a data transmission device.