SH7713 datasheet(490/904 Pages) RENESAS

490 / 904 page

Section 12 Bus State Controller (BSC)

Rev.1.50 Aug. 30, 2006 Page 450 of 860

REJ09B0288-0150

If all 32 Mbytes of the memory space are used as an IC memory card interface, the

REG signal

that switches between the common memory and attribute memory can be generated by a port. If

the memory space used for the IC memory card interface is 16 Mbytes or less, the A24 pin can be

used as the

REG signal by using the memory space as a 16-Mbyte common memory space and a

16-Mbyte attribute memory space.

PCMCIA interface area is 32 Mbytes (An I/O port is used as the

REG)

Area 5 : H'14000000

Attribute memory/common memory

I/O space

Attribute memory/common memory

I/O space

Area 5 : H'16000000

Area 6 : H'18000000

Area 6 : H'1A000000

PCMCIA interface area is 16 Mbytes (A24 is used as the

REG)

Area 5 : H'14000000

Attribute memory

I/O space

Area 5 : H'15000000

Area 5 : H'16000000

H'17000000

Area 6 : H'18000000

Area 6 : H'19000000

Area 6 : H'1A000000

H'1B000000

Common memory

Attribute memory

I/O space

Common memory

Figure 12.41 Example of PCMCIA Space Assignment (CS5BWCR.SA[1:0] = B

′10,

CS6BWCR.SA[1:0] = B

′10)

Basic Timing for I/O Card Interface: Figures 12.42 and 12.43 show the basic timings for the

PCMCIA I/O card interface.

The I/O card and IC memory card interfaces can be switched using an address to be accessed. If

area 5 of the physical space is specified as the PCMCIA, the I/O card interface can automatically

be accessed by accessing the physical addresses from H’16000000 to H’17FFFFFF. If area 6 of

the physical space is specified as the PCMCIA, the I/O card interface can automatically be

accessed by accessing the physical addresses from H

′1A000000 to H′1BFFFFFF.

Note that areas to be accessed as the PCMCIA I/O card must be non-cached if they are logical

space (space P2 or P3) areas, or a non-cached area specified by the MMU.

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