HD6417727BP160CV Datasheet, PDF (947/1098 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/ SH7700 Series

Section 30 PC Card Controller (PCC)
Continuous 32-MB Area Mode: Setting 0 (initial value) in bit 3 (P0MMOD) of the general
control register enables the continuous 32-MB area mode. In this mode, the attribute memory
space and I/O memory space are 32 MB and the common memory space is 64 MB. In the
common memory space, set 1 in bit 2 (P0PA25) of the general control register to access an
address of more than 32 MB. By this operation, 1 is output to A25 pin, enabling an address space
of more than 32 MB to be accessed. When an address of 32 MB or less is accessed, no setting is
required (initial value: 0). This bit does not affect access to attribute memory space or I/O
memory space.
Figure 30.2 shows the relationship between the memory space of the SH7727 and the memory and
I/O spaces of the PC card in the continuous 32-MB area mode. Although memory space and I/O
space are supported in area 6.
In area 6, set 1 in bit 0 (P0REG) of the general control register to access the common memory
space of the PC card, and set 0 in bit 0 to access the attribute memory space (initial value: 0). By
this operation, the set value is output to PCCREG pin, enabling any space to be accessed. When
the I/O space is accessed in area 6, the output of PCCREG pin is always 0 regardless of the value
of bit 0 (P0REG).
See the register descriptions in section 30.2, Register Descriptions for details of register settings.
SH7727 memory
space
PC card address
space
General control
register bit settings
P0MMOD = 0
P0PA24 = x
H'18000000
Area 6
H'1A000000
Attribute memory/
common memory
P0REG
32 MB
I/O space
32 MB
x: Don't care
P0PA25
Attribute memory
32 MB
Common mermoy
Total 64 MB
I/O space
32 MB
P0PA25 = x
P0REG = 0 (attribute)
P0PA25 = 0
P0REG = 1 (common
memory)
P0PA25 = 0
P0REG = 1 (common
memory)
P0PA25 = x
P0REG = x
Pin PCCREG is always 0
Figure 30.2 Continuous 32-MB Area Mode
Rev.6.00 Mar. 27, 2009 Page 889 of 1036
REJ09B0254-0600