Absolute Address-@Aa:8, @Aa:16, @Aa:24, Or @Aa:32; Table 2.13 Absolute Address Access Ranges - Renesas H8SX/1520 Series Hardware Manual

32-bit cisc microcomputer

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Section 2 CPU

Absolute Address—@aa:8, @aa:16, @aa:24, or @aa:32

The operand value is the contents of a memory location which is pointed to by an absolute address

included in the instruction code.

There are 8-bit (@aa:8), 16-bit (@aa:16), 24-bit (@aa:24), and 32-bit (@aa:32) absolute

To access the data area, the absolute address of 8 bits (@aa:8), 16 bits (@aa:16), or 32 bits

(@aa:32) is used. For an 8-bit absolute address, the upper 24 bits are specified by SBR. For a 16-

bit absolute address, the upper 16 bits are sign-extended. A 32-bit absolute address can access the

entire address space.

To access the program area, the absolute address of 24 bits (@aa:24) or 32 bits (@aa:32) is used.

For a 24-bit absolute address, the upper 8 bits are all assumed to be 0 (H'00).

Table 2.13 shows the accessible absolute address ranges.

Program area 24 bits

Rev. 3.00 Mar. 14, 2006 Page 58 of 804

REJ09B0104-0300

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A consecutive 256-byte area (the upper address is set in SBR)

H'00000000 to H'00007FFF,

H'FFFF8000 to H'FFFFFFFF

H'00000000 to H'FFFFFFFF

H'00000000 to H'00FFFFFF

H'00000000 to

H'00000000 to

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