H83028 datasheet(49/923 Pages) RENESAS

Part #	H83028

Description	Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

PDF	923 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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49 / 923 page

Rev. 2.00, 09/03, page 19 of 890

2.2

CPU Operating Modes

The H8/300H CPU has two operating modes: normal and advanced. Normal mode supports a

maximum 64-kbyte address space. Advanced mode supports up to 16 Mbytes.

CPU operating modes

Normal mode

Advanced mode

Maximum 64 kbytes, program

and data areas combined

Maximum 16 Mbytes, program

and data areas combined

Figure 2.1 CPU Operating Modes

2.3

Address Space

Figure 2.2 shows a simple memory map for the H8/3028 Group. The H8/300H CPU can address a

linear address space with a maximum size of 64 kbytes in normal mode, and 16 Mbytes in

advanced mode. For further details see section 3.6, Memory Map in Each Operating Mode.

The 1-Mbyte operating modes use 20-bit addressing. The upper 4 bits of effective addresses are

ignored.

H'00000

H'FFFFF

H'000000

H'FFFFFF

a. 1-Mbyte mode

b. 16-Mbyte mode

H'0000

H'FFFF

Advanced mode

Normal mode

Figure 2.2 Memory Map

H83028 Datasheet(PDF) 49 Page - Renesas Technology Corp