TS32M~1GCF80 | 80X CompactFlash Card | |
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4.10 Host Configuration Requirements for Master/Slave or New Timing Modes
The CF Advanced Timing modes include PCMCIA PC Card style I/O modes that are faster than the original 250 ns cycle time. These modes are not supported by the PCMCIA PC Card specification nor CF by cards based on revisions of the CF specification before Revision 3.0. Hosts shall ensure that all cards accessed through a common electrical interface are capable of operation at the desired, faster than 250 ns, I/O mode before configuring the interface for that I/O mode.
Advanced Timing modes are PCMCIA PC Card style I/O modes that are 100 ns or faster, PC Card Memory modes that are 100ns or faster, True IDE PIO Modes 5,6 and Multiword DMA Modes 3,4. These modes are permitted to be used only when a single card is present and the host and card are connected directly, without a cable exceeding 0.15m in length. Consequently, the host shall not configure a card into an Advanced Timing Mode if two cards are sharing I/O lines, as in Master/Slave operation, nor if it is constructed such that a cable exceeding 0.15 meters is required to connect the host to the card.
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.
5 CF-ATA Drive Register Set Definition and Protocol
The CompactFlash Storage Card can be configured as a high performance I/O device through:
a)The standard
b)Any system decoded 16 byte I/O block using any available IRQ.
c)Memory space.
The communication to or from the CompactFlash Storage Card is done using the Task File registers, which provide all the necessary registers for control and status information related to the storage medium. The PCMCIA interface connects peripherals to the host using four register mapping methods. Table is a detailed description of these methods below:
Table: I/O Configurations
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