The address space of the RX CPU is the 4 Gbyte range from address 0000 0000h to address FFFF FFFFh. Program and data regions taking up to a total of 4 Gbytes are linearly accessible. The address space of the RX-CPU is depicted in figure 1.10. For all regions, the designation may differ with the product and operating mode. For details, see the hardware manuals for the respective products.