h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 83

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Table 2.12 Absolute Address Access Ranges
Note: Normal mode is not available in this LSI.
2.7.6
The instruction contains 8-bit (#xx:8), 16-bit (#xx:16), or 32-bit (#xx:32) immediate data as an
operand.
The ADDS, SUBS, INC, and DEC instructions contain immediate data implicitly. Some bit
manipulation instructions contain 3-bit immediate data in the instruction code, specifying a bit
number. The TRAPA instruction contains 2-bit immediate data in its instruction code, specifying a
vector address.
2.7.7
This mode is used in the Bcc and BSR instructions. An 8-bit or 16-bit displacement contained in
the instruction is sign-extended and added to the 24-bit PC contents to generate a branch address.
Only the lower 24 bits of this branch address are valid; the upper 8 bits are all assumed to be 0
(H′00). The PC value to which the displacement is added is the address of the first byte of the next
instruction, so the possible branching range is –126 to +128 bytes (–63 to +64 words) or –32766 to
+32768 bytes (–16383 to +16384 words) from the branch instruction. The resulting value should
be an even number.
2.7.8
This mode can be used by the JMP and JSR instructions. The instruction code contains an 8-bit
absolute address specifying a memory operand. This memory operand contains a branch address.
The upper bits of the absolute address are all assumed to be 0, so the address range is 0 to 255
(H'0000 to H'00FF in normal mode, H'000000 to H'0000FF in advanced mode). In normal mode,
the memory operand is a word operand and the branch address is 16 bits long. In advanced mode,
the memory operand is a longword operand, the first byte of which is assumed to be 0 (H'00).
Absolute Address
Data address
Program instruction
address
Immediate#xx:8, #xx:16, or #xx:32
Program-Counter Relative@(d:8, PC) or @(d:16, PC)
Memory Indirect@@aa:8
8 bits (@aa:8)
16 bits (@aa:16)
32 bits (@aa:32)
24 bits (@aa:24)
Normal Mode*
H'FF00 to H'FFFF
H'0000 to H'FFFF
Rev. 2.00 Dec. 05, 2005 Page 45 of 724
Advanced Mode
H'FFFF00 to H'FFFFFF
H'000000 to H'007FFF,
H'FF8000 to H'FFFFFF
H'000000 to H'FFFFFF
REJ09B0200-0200
Section 2 CPU