HD6413008VF25 Datasheet, PDF (162/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

6. Bus Controller
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
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 Mbytes)
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
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)
H'FFFFF
(a) 1-Mbyte modes (modes 1 and 2)
H'FFFFFF
(b) 16-Mbyte modes (modes 3 and 4)
Figure 6.2 Access Area Map for Each Operating Mode
Chip select signals (CS₀ 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.
Rev.4.00 Aug. 20, 2007 Page 116 of 638
REJ09B0395-0400