SH7727 Datasheet, PDF (429/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 12 Bus State Controller (BSC)
When the IC memory card interface uses entire 32-Mbyte memory space, the REG signal to
switch common memory and attribute memory can be generated by a port. If the IC card memory
interface uses memory area of 16 Mbytes or less, 32-Mbyte memory space can be used as 16-
Mbyte common memory space and 16-Mbyte attribute memory space as shown in figure 12.29.
In this case, A24 pin can be used as the REG signal.
IC memory interface = 32 Mbytes (I/O port is used for REG)
Area 5: H'14000000 Common/Attribute memory
Area 5: H'16000000
I/O space
Area 6: H'18000000 Common/Attriute memory
Area 6: H'1A000000
I/O space
IC memory interface = 16 Mbytes or less (A24 is used for REG)
Area 5: H'14000000
Area 5: H'15000000
Area 5: H'16000000
H'17000000
Area 6: H'18000000
Area 6: H'19000000
Area 6: H'1A000000
H'1B000000
Attribute memory
Common memory
I/O space
Attribute memory
Common memory
I/O space
Figure 12.29 PCMCIA Space Assignment
Rev. 5.00 Dec 12, 2005 page 357 of 1034
REJ09B0254-0500