smc128cf Numonyx, smc128cf Datasheet - Page 20

• Manufacturer Part Number: smc128cf
• Description: 128-mbyte, 1-gbyte, 8-gbyte, 3.3/5 V Supply, Compactflash? Card
• Manufacturer: Numonyx

Card configuration
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Card configuration
Refer to paragraph 4.4 of CF specification 3.0.
Host configuration requirements
The CompactFlash advanced timing modes include PCMCIA-style I/O modes that are faster
than the original 250 ns cycle time (see
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 250 ns.
These modes must be used in the conditions described in
requirements for CompactFlash advanced timing
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 0.15 m.
The load presented to the host by cards supporting Ultra DMA is more controlled than that
presented by other CompactFlash cards. Therefore, the use of a card that does not support
Ultra DMA in a master/slave arrangement with a Ultra DMA card can affect the critical timing
of the Ultra DMA transfers. The host shall not configure a card into Ultra DMA mode when a
card not supporting Ultra DMA is also present on the same interface.
When the use of two cards on an interface is otherwise permitted, the host may use any
mode that is supported by both cards, but to achieve maximum performance it should use its
highest performance mode that is also supported by both cards.
Software interface
Refer to section 6.1 of CF specification version 3.0.
CF-ATA registers
Refer to section 6.1.5 of CF specification version 3.0.
CF-ATA command description
Refer to section 6.2 of CF specification version 3.0.
Section 1:
mode. In particular, the host can be
Description).
SMC128CF, SMC01GCF, SMC08GCF
Section 4.4: Additional