Product manual

CompactFlash Memory Card Product Manual Preliminary

5.0 ATA Drive Register Set Definition and

Protocol

The CompactFlash Memory Card can be

configured as a high performance I/O device

through:

a.) Standard PC-AT disk I/O address spaces 1F0h-

1F7h, 3F6h-3F7h (primary); 170h-177h, 376h-

377h (secondary) with IRQ 14 (or other

available IRQ).

b.) Any system decoded 16 byte I/O block using

any available IRQ.

c.) Memory space.

The communication to or from the CompactFlash

Memory Card is done using the Task File registers

which provide all the necessary registers for

control and status information. The PCMCIA

interface connects peripherals to the host using

four register mapping methods. The following is a

detailed description of these methods:

Table 5-1 I/O Configurations

Standard Configurations

Config

Index

IO or

Memory

Address Drive # Description

0 Memory 0-F, 400-7FF 0 Memory Mapped

1 I/O XX0-XXF 0 I/O Mapped 16 Contiguous Registers

2 I/O 1F0-1F7, 3F6-3F7 0 Primary I/O Mapped Drive 0

2 I/O 1F0-1F7, 3F6-3F7 1 Primary I/O Mapped Drive 1

3 I/O 170-177, 376-377 0 Secondary I/O Mapped Drive 0

3 I/O 170-177, 376-377 1 Secondary I/O Mapped Drive 1