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
- C E 2
- C E 1
A0
- I O R D
- I O W R
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
Содержание CompactFlash
Страница 100: ...100 SanDisk CompactFlash Memory Card Product Manual 1998 SANDISK CORPORATION...
Страница 106: ...Ordering Information and Technical Support 106 SanDisk CompactFlash Memory Card Product Manual 1998 SANDISK CORPORATION...
Страница 107: ...CompactFlash Memory Card Product Manual 1998 SANDISK CORPORATION 107 SanDisk Sales Offices...
Страница 108: ...SanDisk Worldwide Sales Offices 108 CompactFlash Memory Card Product Manual 1998 SANDISK CORPORATION...
Страница 110: ...SanDisk Worldwide Sales Offices 110 CompactFlash Memory Card Product Manual 1998 SANDISK CORPORATION...