Transcend TS8GCF200I Fiche technique télécharger pdf (Page 43)

Transcend Information Inc.

V1.2

I/O Transfer Function

The I/O transfer to or from the CompactFlash Storage can be either 8 or 16 bits. When a 16 bit accessible port

is addressed, the signal -IOIS16 is asserted by the CompactFlash Storage. Otherwise, the -IOIS16 signal is

de-asserted. When a 16 bit transfer is attempted, and the -IOIS16 signal is not asserted by the CompactFlash

Storage, the system shall generate a pair of 8 bit references to access the word‘s even byte and odd byte. The

CompactFlash Storage Card permits both 8 and 16 bit accesses to all of its I/O addresses, so -IOIS16 is

asserted for all addresses to which the CompactFlash Storage responds. The CompactFlash Storage Card

may request the host to extend the length of an input cycle until data is ready by asserting the -WAIT signal at

the start of the cycle.

Table : PCMCIA Mode I/O Function

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 86 87

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