SH7720 Datasheet, PDF (1021/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 29 PC Card Controller (PCC)
29.1.1 PCMCIA Support
This LSI supports an interface based on PCMCIA specifications for physical areas 6. Interfaces
supported are the IC memory card interface and I/O card interface defined in the PCMCIA Rev.
2.1/JEIDA Ver. 4.2 standard. Both the IC memory card interface and I/O card interface are
supported in area 6.
Table 29.1 Features of the PCMCIA Interface
Item
Feature
Access
Random access
Data bus
8/16 bits
Memory type
Masked ROM, OTPROM, EPROM, EEPROM, flash memory, SRAM
Common memory capacity Maximum 64 Mbytes (Supports full PCMCIA specifications by using
a segment bit (an address bit for the PC card))
Attribute memory capacity Maximum 32 Mbytes
I/O space capacity
Maximum 32 Mbytes
Others
Dynamic bus sizing for I/O bus width^*
The PCMCIA interface can be accessed from the address-
conversion region and non-address-conversion region.
Note: * Dynamic bus sizing for the I/O bus width is supported only in little-endian mode.
This LSI can directly access 32- and 64-Mbyte physical areas in a 64-Mbyte memory space and an
I/O space of the PC card (continuous 32/16-Mbyte area mode). This LSI provides a segment bit
(an address bit for the PC card) in the general control register for area 6 to support a common
memory space with full PCMCIA specifications (64 Mbytes).
(1) Continuous 32-Mbyte Area Mode
Setting 0 (initial value) in bit 3 (P0MMOD) of the general control register enables the continuous
32-Mbyte area mode. In this mode, the attribute memory space and I/O memory space are 32
Mbytes and the common memory space is 64 Mbytes. In the common memory space, set 1 in bit 2
(P0PA25) of the general control register to access an address of more than 32 Mbytes. By this
operation, 1 is output to A25 pin, enabling an address space of more than 32 Mbytes to be
accessed. When an address of 32 Mbytes or less is accessed, set 0 in POPA25. This bit does not
affect access to attribute memory space or I/O memory space.
Figure 29.2 shows the relationship between the memory space of this LSI and the memory and I/O
spaces of the PC card in the continuous 32-Mbyte area mode. Memory space and I/O space are
supported in area 6.
Rev. 3.00 Jan. 18, 2008 Page 959 of 1458
REJ09B0033-0300