SH7708 datasheet(303/633 Pages) RENESAS

No. de pieza	SH7708

Descripción Electrónicos	SuperH??RISC engine

PDF	633 Pages

Scroll/Zoom	100%

Fabricante Electrónico	RENESAS [Renesas Technology Corp]

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Memory Card Interface Basic Timing: Figure 10.42 shows the basic timing for the PCMCIA IC

memory card interface. When physical space areas 5 and 6 are designated as PCMCIA interface

areas, bus accesses are automatically performed as IC memory card interface accesses when the

lower address 32 Mbyte space of each area is accessed.

With a high external bus frequency (CKIO), the setup and hold times for the address (A24–A0),

card enable (

CS5, CE2A, CS6, CE2B), and write data (D15–D0) in a write cycle, become

insufficient with respect to

RD and WR (the WE1 pin in the SH7708 Series). The SH7708 Series

provides for this by enabling setup and hold times to be set for physical space areas 5 and 6 in the

PCR register. Also, software waits by means of a WCR2 register setting and hardware waits by

means of the

WAIT pin can be inserted in the same way as for the basic interface. WAIT is a

synchronous signal. Figure 10.43 shows the PCMCIA memory bus wait timing.

SH7708 Datasheet(PDF) 303 Page - Renesas Technology Corp