HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 69

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

2.2
The address spaces that can be accessed by the CPU mounted on this LSI differ depending on the
processing mode as described above, and the address space handled by the CPU may not match
the physical address space. To avoid misunderstandings, the address space which is output by the
CPU is referred to as the logical address space while the actual physical address space is referred
to as the physical address space. Furthermore, among the physical address space, the space to
which this LSI can make external access is referred to as the external address space. These terms
are used hereafter in this manual.
2.2.1
The address space which is output by the CPU is referred to as the logical address space. The CPU
of this LSI supports a 32-bit logical address space and accesses system resources using the 4
Gbytes of logical address space. User programs and data are accessed from the logical address
space. From the hardware view, the addresses output from the CPU are used on the L bus (see
figure 1.1 in section 1, Overview). The logical address space is divided into several areas and
managed as shown in figure 2.2.
In privileged mode, 4 Gbytes of space from P0 area to P4 area can be accessed.
In user mode, 2 Gbytes of space in U0 area can be accessed. When the DSP bit in SR is set to 1,
16 Mbytes of space in Uxy area can be also accessed. If areas other than U0 and Uxy are accessed
in user mode, an address error occurs.
Memory Map
Logical Address Space
Rev. 1.00, 02/04, page 31 of 804