HD6417618 datasheet(217/646 Pages) RENESAS

Nome de Peças	HD6417618

Descrição Electrónicos	32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series

PDF	646 Pages

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Fabricante Electrônico	RENESAS [Renesas Technology Corp]

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Section 7 Bus State Controller (BSC)

Rev. 6.00 Jun. 12, 2007 Page 185 of 610

REJ09B0131-0600

Basic Timing for Memory Card Interface: Figure 7.31 shows the basic timing of the PCMCIA

IC memory card interface. If areas 5 and 6 in the physical space are specified as the PCMCIA

interface, accessing the common memory areas in areas 5 and 6 automatically accesses with the IC

memory card interface. If the external bus frequency (CKIO) increases, the setup times and hold

times for the address pins (A25 to A0), card enable signals (

CE1A, CE2A, CE1B, CE2B), and

write data (D15 to D0) to the

RD and WE signals become insufficient. To prevent this error, this

LSI can specify the setup times and hold times for areas 5 and 6 in the physical space

independently, using CS5BWCR and CS6BWCR. In the PCMCIA interface, as in the normal

space interface, a software wait or hardware wait can be inserted using the

WAIT pin. Figure 7.32

shows the PCMCIA memory bus wait timing.

Tpcm1w

CKIO

A25 to A0

CExx

RD/

D15 to D0

Read

Write

Tpcm2

Tpcm1

Tpcm1w

Figure 7.31 Basic Access Timing for PCMCIA Memory Card Interface

HD6417618 Folha de dados(PDF) 217 Page - Renesas Technology Corp