hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 76
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hd64338023s
Manufacturer Part Number
hd64338023s
Description
Renesas 8-bit Single-chip Microcomputer Super Low Power Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD64338023S.pdf
(697 pages)
- Current page: 76 of 697
- Download datasheet (6Mb)
Section 2 CPU
The upper 8 bits of the absolute address are assumed to be 0 (H'00), so the address range is from
H'0000 to H'00FF (0 to 255). Note that with the H8/300L Series, the lower end of the address area
is also used as a vector area. See section 3.3, Interrupts, for details on the vector area.
If an odd address is specified as a branch destination or as the operand address of a MOV.W
instruction, the least significant bit is regarded as 0, causing word access to be performed at the
address preceding the specified address. See section 2.3.2, Memory Data Formats, for further
information.
2.4.2
Effective Address Calculation
Table 2.2 shows how effective addresses are calculated in each of the addressing modes.
Arithmetic and logic instructions use register direct addressing (1). The ADD.B, ADDX, SUBX,
CMP.B, AND, OR, and XOR instructions can also use immediate addressing (6).
Data transfer instructions can use all addressing modes except program-counter relative (7) and
memory indirect (8).
Bit manipulation instructions can use register direct (1), register indirect (2), or 8-bit absolute
addressing (5) to specify the operand. Register indirect (1) (BSET, BCLR, BNOT, and BTST
instructions) or 3-bit immediate addressing (6) can be used independently to specify a bit position
in the operand.
Rev. 7.00 Mar 10, 2005 page 34 of 652
REJ09B0042-0700
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