Datasheet

T
T
T
r
r
r
a
a
a
n
n
n
s
s
s
c
c
c
e
e
e
n
n
n
d
d
d
I
I
I
n
n
n
d
d
d
u
u
u
s
s
s
t
t
t
r
r
r
i
i
i
a
a
a
l
l
l
C
C
C
F
F
F
C
C
C
a
a
a
r
r
r
d
d
d
(
(
(
1
1
1
2
2
2
8
8
8
M
M
M
B
B
B
~
~
~
8
8
8
G
G
G
B
B
B
)
)
)
Transcend Information Inc.
41
True IDE Mode I/O Transfer Function
The CompactFlash Storage Card and CF+ Card can be configured in a True IDE Mode of operation. The
CompactFlash Storage Card is configured in this mode only when the -OE input signal is grounded by the host
during the power off to power on cycle. Optionally, CompactFlash Storage Cards and CF+ Cards may support the
following optional detection methods:
1. The card is permitted to monitor the –OE (-ATA SEL) signal at any time(s) and switch to PCMCIA mode upon
detecting a high level on the pin.
2. The card is permitted to re-arbitrate the interface mode determination following a transition of the (-)RESET pin.
3. The card is permitted to monitor the –OE (-ATA SEL) signal at any time(s) and switch to True IDE mode upon
detection of a continuous low level on pin for an extended period of time.
Table: True IDE Mode I/O Function defines the function of the operations for the True IDE Mode.