Manual

220 Series Commercial Grade CF Product Manual v2.0Cactus Technologies
®
14
Signal Name Dir. Description
VCC
(CF Card Memory Mode)
--
+5 V, +3.3 V power.
VCC
(CF Card I/O Mode)
This signal is the same for all modes.
VCC
(True IDE Mode)
This signal is the same for all modes.
-VS1
-VS2
(CF Card Memory Mode)
O
Voltage Sense Signals. -VS1 is grounded so that the CompactFlash
Card CIS can be read at 3.3 volts and -VS2 is open and reserved by
CF Card for a secondary voltage.
-VS1
-VS2
(CF Card I/O Mode)
This signal is the same for all modes.
-VS1
-VS2
(True IDE Mode)
This signal is the same for all modes.
-WAIT
(CF Card Memory Mode)
O
The –WAIT signal is driven by the CompactFlash Card to signal to the
host to delay completion of the memory cycle in progress.
-WAIT
(CF Card I/O Mode)
The –WAIT signal is driven by the CompactFlash Card to signal to the
host to delay completion of the I/O cycle in progress.
-IORDY
(True IDE Mode, UDMA not
active)
-DDMARDY
(TrueIDE Mode, UDMA
write active)
DSTROBE
(TrueIDE Mode, UDMA read
active)
In TrueIDE Mode, when UDMA protocol is not active, thissignal is
driven by the device to extend the I/O cycle in progress.
In TrueIDE Mode, when UDMA write protocol is active, this signal is
asserted by the device to indicate that it is ready to receive a data
out burst.
In TrueIDE Mode, when UDMA read protocol is active, this signal is the
data strobe sent by the device to the host. The host latches data on
both the rising and falling edges of this signal.
-WE
(CF Card Memory Mode)
I
This is a signal driven by the host and used for strobing memory
write data to the registers of the CompactFlash Card when the
card is congured in the memory interface mode. It is also used for
writing the conguration registers.
-WE
(CF Card I/O Mode)
In CF Card I/O Mode, this signal is used for writing the conguration
registers.
Reserved
(True IDE Mode)
In True IDE Mode this input signal is not used and should be
connected to VCC by the host.