SMCXXXBF Datasheet, PDF (42/91 Pages) STMicroelectronics – 32MByte, 64MByte, 128MByte, 256MByte, 512MByte, 1GByte, 2GByte, and 4GByte 3.3/5V Supply CompactFlash™ Card

Host configuration requirements
7
Host configuration requirements
SMCxxxBF
The CompactFlash Advanced Timing modes include PCMCIA-style I/O modes that are
faster than the original 250 ns cycle time (see Section 1: Summary description).
Before configuring the Card interface for the I/O mode, the host must ensure that all the
cards connected to a given electrical interface support I/O transfers faster than 250ns.
These modes must be used in the conditions described in Section 4.4. In particular, the host
can be connected to one card only. Consequently, the host must not configure a card to
operate in an CompactFlash Advanced Timing mode if two cards are sharing the same I/O
lines in Master/Slave operation, or if it is connected to the card through a cable which length
exceeds 0.15m.
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