SH7672 datasheet(303/1292 Pages) RENESAS

303 / 1292 page

Section 7

Bus State Controller (BSC)

Rev. 1.00 Nov. 14, 2007 Page 277 of 1262

REJ09B0437-0100

7.5.7

PCMCIA Interface

With this LSI, areas 5 and 6 can be used for the IC memory card and I/O card interface defined in

the JEIDA specifications version 4.2 (PCMCIA2.1 Rev. 2.1) by specifying bits TYPE[2:0] in

CSnBCR (n = 5 and 6) to B'101. In addition, the bits SA[1:0] in CSnWCR (n = 5 and 6) assign the

upper or lower 32 Mbytes of each area to IC memory card or I/O card interface. For example, if

the bits SA1 and SA0 in CS5WCR are set to 1 and cleared to 0, respectively, the upper 32 Mbytes

of area 5 are used for IC memory card interface and the lower 32 Mbytes are used for I/O card

interface.

When the PCMCIA interface is used, the bus size must be specified as 8 bits or 16 bits using the

bits BSZ[1:0] in CS5BCR or CS6BCR.

Figure 7.36 shows an example of connection between this LSI and a PCMCIA card. To enable hot

swapping (insertion and removal of the PCMCIA card with the system power turned on), tri-state

buffers must be connected between the LSI and the PCMCIA card.

In the JEIDA and PCMCIA standards, operation in big endian mode is not clearly defined.

Consequently, the provided PCMCIA interface in big endian mode is available only for this LSI.

SH7672 Datasheet(PDF) 303 Page - Renesas Technology Corp