Transcend TS32GCF133 Datasheet download pdf (Page 39)

133X CompactFlash Card

Transcend Information Inc.

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 ... 34 35 36 37 38 39 40 41 42 43 44 ... 78 79

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Transcend TS32GCF133 Datasheet Page 39