H8SLASH3021 datasheet(68/712 Pages) RENESAS

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H8/3021 数据表(PDF) 68 Page - Renesas Technology Corp

部件名	H8/3021

功能描述	16-Bit Single-Chip Microcomputer

PDF	712 Pages

Scroll/Zoom	100%

制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

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68 / 712 page

2. CPU

Rev.2.00 Mar. 22, 2007 Page 44 of 684

REJ09B0352-0200

Specified by @aa:8

Reserved

Branch address

Figure 2.10 Memory-Indirect Branch Address Specification

When a word-size or longword-size memory operand is specified, or when a branch address is

specified, if the specified memory address is odd, the least significant bit is regarded as 0. The

accessed data or instruction code therefore begins at the preceding address. See section 2.5.2,

Memory Data Formats.

2.7.2

Effective Address Calculation

Table 2.13 explains how an effective address is calculated in each addressing mode. In the

1-Mbyte operating modes the upper 4 bits of the calculated address are ignored in order to

generate a 20-bit effective address.

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