HD64F7047 datasheet(58/764 Pages) RENESAS

Part #	HD64F7047

Description	Renesas 32-Bit RISC Microcomputer SuperHTMRISC engine Family/SH7000 Series

PDF	764 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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58 / 764 page

Rev. 2.00, 09/04, page 18 of 720

2.3

Data Formats

2.3.1

Data Format in Registers

or a word (16 bits), it is changed into a longword by expanding the sign-part when loaded into a

Longword

Figure 2.2 Data Format in Registers

2.3.2

Data Formats in Memory

Memory data formats are classified into bytes, words, and longwords. Byte data can be accessed

from any address. Locate, however, word data at an address 2n, longword data at 4n. Otherwise,

an address error will occur if an attempt is made to access word data starting from an address other

than 2n or longword data starting from an address other than 4n. In such cases, the data accessed

cannot be guaranteed. The hardware stack area, pointed by the hardware stack pointer (SP, R15),

uses only longword data starting from address 4n because this area holds the program counter and

status register.

Byte

Word

Address 2n

Address 4n

Longword

Address m

Address m + 2

Address m + 1

Address m + 3

Figure 2.3 Data Formats in Memory

HD64F7047 Datasheet(PDF) 58 Page - Renesas Technology Corp