Instruction Manual

503 Series Industrial Grade CompactFlash Card Product Manual v2.1Cactus Technologies
®
12
Signal Name Dir. Description
A10—A0
(CF Card Memory Mode)
I
These address lines along with the -REG signal are used to select the
following: The I/O port address registers within the CompactFlash
Card, the memory mapped port address registers within the card, a
byte in the card’s information structure and its conguration control
and status registers.
A10—A0
(CF Card I/O Mode)
I
This signal is the same as the CF Card Memory Mode signal.
A2—A0
(True IDE Mode)
A10—A3
(True IDE Mode)
In True IDE Mode only A[2:0] is used to select the one of eight
registers in the Task File.
In True IDE Mode these remaining address lines should be
grounded by the host.
BVD1
(CF Card Memory Mode)
I/O
This signal is asserted high as the BVD1 signal since a battery is not
used with this product.
-STSCHG
(CF Card I/O Mode)
Status Changed
This signal is asserted low to alert the host to changes in the RDY/-
BSY and Write Protect states, while the I/O interface is congured.
Its use is controlled by the Card Cong and Status Register.
-PDIAG
(True IDE Mode)
In the True IDE Mode, this input/output is the Pass Diagnostic signal
in the Master/Slave handshake protocol.
BVD2
(CF Card Memory Mode)
I/O
This output line is always driven to a high state in Memory Mode
since a battery is not required for this product.
-SPKR
(CF Card I/O Mode)
This output line is always driven to a high state in I/O Mode since
this product does not support the audio function.
-DASP
(True IDE Mode)
In the True IDE Mode, this input/output is the Disk Active/Slave
Present signal in the Master/Slave handshake protocol.
-CD1, -CD2
(CF Card Memory Mode)
O
These Card Detect pins are connected to ground on the
CompactFlash Card. They are used by the host to determine if the
card is fully inserted into its socket.
-CD1, -CD2
(CF Card I/O Mode)
This signal is the same for all modes.
-CD1, -CD2
(True IDE Mode)
This signal is the same for all modes.
Table 3-7. Signal Description