SH7721 datasheet(349/1524 Pages) RENESAS

349 / 1524 page

Section 9

Bus State Controller (BSC)

Rev. 3.00 Jan. 18, 2008 Page 287 of 1458

REJ09B0033-0300

9.3.3

Address Map

The external address space has a capacity of 384 Mbytes and is used by dividing eight partial

spaces (address map 1) or six partial spaces (address map 2). The kind of memory to be connected

and the data bus width are specified in each partial space. The address map for the external address

space is listed below.

Table 9.2

Address Space Map 1 (CMNCR.MAP = 0)

Physical Address

Area

Memory to be Connected

Capacity

H'00000000 to H'03FFFFFF

Area 0

Normal memory

Burst ROM (Asynchronous)

Burst ROM (Synchronous)

64 Mbytes

H'04000000 to H'07FFFFFF

Area 1

Internal I/O register area*

64 Mbytes

H'08000000 to H'0BFFFFFF

Area 2

Normal memory

Byte-selection SRAM

SDRAM

64 Mbytes

H'0C000000 to H'0FFFFFFF

Area 3

Normal memory

Byte-selection SRAM

SDRAM

64 Mbytes

H'10000000 to H'13FFFFFF

Area 4

Normal memory

Byte-selection SRAM

Burst ROM (Asynchronous)

64 Mbytes

H'14000000 to H'15FFFFFF

Area 5A

Normal memory

32 Mbytes

H'16000000 to H'17FFFFFF

Area 5B

Normal memory

Byte-selection SRAM

32 Mbytes

H'18000000 to H'19FFFFFF

Area 6A

Normal memory

32 Mbytes

H'1A000000 to H'1BFFFFFF

Area 6B

Normal memory

Byte-selection SRAM

32 Mbytes

H'1C000000 to H'1FFFFFFF

Area 7

Reserved area*

64 Mbytes

Notes: 1. Do not access the reserved area. If the reserved area is accessed, the correct

operation cannot be guaranteed.

2. Set the top three bits of the address to 101 to allocate in the P2 space.

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