p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 86
p2125vps20
Manufacturer Part Number
p2125vps20
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.P2125VPS20.pdf
(700 pages)
- Current page: 86 of 700
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Section 2 CPU
Table 2.12 Absolute Address Access Ranges
2.7.6
The 8-bit (#xx:8), 16-bit (#xx:16), or 32-bit (#xx:32) immediate data contained in an instruction
code can be used directly as an operand.
The ADDS, SUBS, INC, and DEC instructions implicitly contain immediate data in their
instruction codes. 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 can be used by the Bcc and BSR instructions. An 8-bit or 16-bit displacement
contained in the instruction code is sign-extended to 24-bit and added to the 24-bit address
indicated by the PC value to generate a 24-bit branch address. Only the lower 24-bit of this branch
address are valid; the upper eight 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-byte (–63 to +64 words) or –32766 to +32768-byte (–16383 to
+16384 words) from the branch instruction. The resulting value should be an even number.
Rev. 1.00 Sep. 21, 2006 Page 48 of 658
REJ09B0310-0100
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)
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
Advanced Mode
H'FFFF00 to H'FFFFFF
H'000000 to H'007FFF,
H'FF8000 to H'FFFFFF
H'000000 to H'FFFFFF
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