H83067RF datasheet(67/963 Pages) RENESAS

67 / 963 page

Section 2 CPU

Rev. 4.00 Jan 26, 2006 page 45 of 938

REJ09B0276-0400

Table 2.10

Block Transfer Instruction

Instruction

Size

Function

EEPMOV.B

—

if R4L

≠ 0 then

repeat

@ER5+

→ @ER6+, R4L – 1 → R4L

until

R4L = 0

else next;

EEPMOV.W

—

if R4

≠ 0 then

repeat

@ER5+

→ @ER6+, R4 – 1 → R4

until

R4 = 0

else next;

Block transfer instruction. This instruction transfers the number of data bytes

specified by R4L or R4, starting from the address indicated by ER5, to the

location starting at the address indicated by ER6. At the end of the transfer,

the next instruction is executed.

2.6.4

Basic Instruction Formats

The H8/300H instructions consist of 2-byte (1-word) units. An instruction consists of an operation

field (OP field), a register field (r field), an effective address extension (EA field), and a condition

field (cc).

Operation Field: Indicates the function of the instruction, the addressing mode, and the operation

to be carried out on the operand. The operation field always includes the first 4 bits of the

instruction. Some instructions have two operation fields.

by 3 bits or 4 bits. Some instructions have two register fields. Some have no register field.

Effective Address Extension: Eight, 16, or 32 bits specifying immediate data, an absolute

address, or a displacement. A 24-bit address or displacement is treated as 32-bit data in which the

first 8 bits are 0 (H'00).

Condition Field: Specifies the branching condition of Bcc instructions.

Figure 2.9 shows examples of instruction formats.

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