Manual

220 Series Commercial Grade CF Product Manual v2.0Cactus Technologies
®
12
Signal Name Dir. Description
-INPACK
(CF Card Memory Mode)
O
This signal is not used in this mode.
-INPACK
(CF Card I/O Mode)
Input Acknowledge
The Input Acknowledge signal is asserted by the CompactFlash Card
when the card is selected and responding to an I/O read cycle at the
address that is on the address bus. This signal is used by the host to
control the enable of any input data buers between the card and the
CPU.
DMARQ (True IDE Mode)
In True IDE Mode, this pin is an output from the card to request
DMA mode transfer.
-IORD
(CF Card Memory Mode)
I
This signal is not used in this mode.
-IORD
(CF Card I/O Mode)
This is an I/O Read strobe generated by the host. This signal gates
I/O data onto the bus from the CompactFlash Card when the card is
congured to use the I/O interface.
-IORD
(True IDE Mode, UDMA not
active)
-HDMARDY
(TrueIDE Mode, UDMA
read)
HSTROBE
(TrueIDE Mode, UDMA
write)
In True IDE Mode, when UDMA protocol is not active, this signal has
the same function as in CF Card I/O Mode.
In TrueIDE Mode, when UDMA read protocol is active, this signal is
asserted by the host to indicate that it is ready to receive data-in
bursts.
In TrueIDE Mode, when UDMA write protocol is active, this signal is
the data out strobe sent by the host. Data is latched by the device on
both rising and falling edges of this signal.
-IOWR
(CF Card Memory Mode)
I
This signal is not used in this mode.
-IOWR
(CF Card I/O Mode)
The I/O Write strobe pulse is used to clock I/O data on the Card Data
bus into the CompactFlash controller registers when the card is
congured to use the I/O interface.
The clocking will occur on the negative to positive edge of the signal
(trailing edge).
-IOWR
(True IDE Mode, UDMA not
active)
STOP
(TrueIDE Mode, UDMA
active)
In True IDE Mode, when UDMA protocol is not active, this signal has
the same function as in CF Card I/O Mode.
In TrueIDE Mode, when UDMA protocol is active, host asserts this
signal to terminate the UDMA transfer.