SH7721 datasheet(1021/1524 Pages) RENESAS

1021 / 1524 page

Section 29

PC Card Controller (PCC)

Rev. 3.00 Jan. 18, 2008 Page 959 of 1458

REJ09B0033-0300

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.

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