Renesas SH7709S - page 358

Rev. 5.00, 09/03, page 314 of 760
When the entire 32-Mbyte memory space is used as IC memory car d interface space, the common
memory/attribute memor y switching signal REG is generated using a port, etc. If 16 Mbytes or
less of memory space is sufficient, using 16 Mbytes of memory space as common memory space
and 16 Mbytes as attribute m e mory space enables the A24 pin to be used for the REG signal.
I/O space
I/O space
I/O space
Area 5: H'14000000
Area 5: H'16000000
Area 6: H'18000000
Area 6: H'1A000000
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
Attribute memory
Common memory
I/O space
Up to 16-Mbyte capacity (REG = A24)
32-Mbyte capacity (REG = I/O port)
Common memory/
attribute memory
Common memory/
attribute memory
Figure 10.36 PCMCIA Space Allocation