HD6417618A datasheet(59/646 Pages) RENESAS

59 / 646 page

Section 2 CPU

Rev. 6.00 Jun. 12, 2007 Page 27 of 610

REJ09B0131-0600

Immediate Data: 8-bit immediate data is placed in the instruction code. Word and longword

immediate data is not placed in the instruction code. It is placed in a table in memory. The table in

memory is accessed with the MOV immediate data instruction using PC relative addressing mode

with displacement.

Table 2.5

Access to Immediate Data

Type

This LSI's CPU

Example of Other CPU

8-bit immediate

MOV

#H'12,R0

MOV.B

#H'12,R0

16-bit immediate

MOV.W

@(disp,PC),R0

........

.DATA.W H'1234

MOV.W

#H'1234,R0

32-bit immediate

MOV.L

@(disp,PC),R0

........

.DATA.L H'12345678

MOV.L

#H'12345678,

Note:

Immediate data is accessed by @(disp,PC).

Absolute Addresses: When data is accessed by absolute address, place the absolute address value

in a table in memory beforehand. The absolute address value is transferred to a register using the

method whereby immediate data is loaded when an instruction is executed, and the data is

accessed using the register indirect addressing mode.

Table 2.6

Access to Absolute Address

Type

CPU in this LSI

Example of Other CPUs

Absolute address

MOV.L

@(disp,PC),R1

MOV.B

@R1,R0

........

.DATA.L H'12345678

MOV.B

@H'12345678,

Note:

Immediate data is referenced by @(disp,PC).

16-Bit/32-Bit Displacement: When data is accessed using the 16- or 32-bit displacement

addressing mode, the displacement value is placed in a table in memory beforehand. Using the

method whereby immediate data is loaded when an instruction is executed, this value is

transferred to a register and the data is accessed using index register indirect addressing mode.

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