SanDisk CompactFlash User Manual

CompactFlash Memory Card Product Manual
SanDisk CompactFlash Memory Card Product Manual © 1998 SANDISK CORPORATION 45
4.7 True IDE Mode I/O Transfer Function
4.7.1 True IDE Mode I/O Function
The CompactFlash Memory Card can be
configured in a True IDE Mode of operation. This
CompactFlash Card is configured in this mode
only when the -OE input signal is grounded by the
host. In this True IDE Mode, the PCMCIA protocol
and configuration are disabled and only I/O
operations to the Task File and Data Register are
allowed. In this mode, no Memory or Attribute
Registers are accessible to the host.
CompactFlash Cards permit 8 bit data accesses if
the user issues a Set Feature Command to put the
device in 8 bit Mode.
Note: Removing and reinserting the CompactFlash
Memory Card while the host computer’s power is
on will reconfigure the CompactFlash Card to PC
Card ATA mode from the original True IDE Mode.
To configure the CompactFlash Card in True IDE
Mode, the 68-pin socket must be power cycled
with the CompactFlash Card inserted and -OE
(output enable) grounded by the host.
The following table defines the function of the
operations for the True IDE Mode.
Table 4-17 IDE Mode I/O Function
Function Code -CE2 -CE1 A0 -IORD -IOWR D15-D8 D7-D0
Invalid Mode L L X X X High Z High Z
Standby Mode H H X X X High Z High Z
Task File Write H L 1-7h H L Don't Care Data In
Task File Read H L 1-7h L H High Z Data Out
Data Register
Write
H L 0 H L Odd-Byte
In
Even-Byte
In
Data Register
Read
H L 0 L H Odd-Byte
Out
Even-Byte
Out
Control Register
Write
L H 6h H L Don't Care Control In
Alt Status Read L H 6h L H High Z Status Out

SanDisk CompactFlash Specifications

General

Brand	SanDisk
Model	CompactFlash
Category	Storage
Language	English