H83069RF datasheet(157/1003 Pages) RENESAS

157 / 1003 page

Rev. 5.0, 09/04, page 135 of 978

6.3

Operation

6.3.1

Area Division

The external address space is divided into areas 0 to 7. Each area has a size of 128 kbytes in the

1-Mbyte modes, or 2-Mbytes in the 16-Mbyte modes. Figure 6.2 shows a general view of the

memory map.

H'00000

H'1FFFF

H'20000

H'3FFFF

H'40000

H'5FFFF

H'60000

H'7FFFF

H'80000

H'9FFFF

H'A0000

H'BFFFF

H'C0000

H'DFFFF

H'E0000

H'FFFFF

Area 0 (128 kbytes)

Area 1 (128 kbytes)

Area 2 (128 kbytes)

Area 3 (128 kbytes)

Area 4 (128 kbytes)

Area 5 (128 kbytes)

Area 6 (128 kbytes)

Area 7 (128 kbytes)

H'000000

H'1FFFFF

H'200000

H'3FFFFF

H'400000

H'5FFFFF

H'600000

H'7FFFFF

H'800000

H'9FFFFF

H'A00000

H'BFFFFF

H'C00000

H'DFFFFF

H'E00000

H'FFFFFF

Area 0 (2 Mbytes)

Area 1 (2 Mbytes)

Area 2 (2 Mbytes)

Area 3 (2 Mbytes)

Area 4 (2 Mbytes)

Area 5 (2 Mbytes)

Area 6 (2 Mbytes)

Area 7 (2 Mbytes)

(a) 1-Mbyte modes (modes 1 and 2)

(b) 16-Mbyte modes (modes 3, 4, and 5)

Figure 6.2 Access Area Map for Each Operating Mode

Chip select signals (

0 to CS7) can be output for areas 0 to 7.

The bus specifications for each

area are selected in ABWCR, ASTCR, WCRH, and WCRL.

In 16-Mbyte mode, the area division units can be selected with the RDEA bit in BCR.

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