Product manual

Preliminary CompactFlash Memory Card Product Manual
SanDisk CompactFlash Memory Card Product Manual Rev. 8 © 2001 SANDISK CORPORATION
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Table 4-2 Signal Description
Signal Name Dir. Pin Description
A10 - A0
(PC Card Memory Mode)
I 8, 10, 11, 12, 14,
15, 16, 17, 18,
19, 20
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 configuration control
and status registers.
A10 - A0
(PC Card I/O Mode)
This signal is the same as the PC Card Memory Mode signal.
A2 - A0
(True IDE Mode)
A10 - A3
(True IDE Mode)
I 18, 19, 20 In True IDE Mode only A[2:0] are 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
(PC Card Memory Mode)
I/O 46 This signal is asserted high as the BVD1 signal since a battery is not
used with this product.
-STSCHG
(PC 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 configured. Its
use is controlled by the Card Config 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
(PC Card Memory Mode)
I/O 45 This output line is always driven to a high state in Memory Mode
since a battery is not required for this product.
-SPKR
(PC 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
(PC Card Memory Mode)
O 26, 25 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
(PC 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.
-CE1, -CE2
(PC Card Memory Mode)
Card Enable
I 7, 32 These input signals are used both to select the card and to indicate to
the card whether a byte or a word operation is being performed. -CE2
always accesses the odd byte of the word. -CE1 accesses the even byte
or the Odd byte of the word depending on A0 and -CE2. A multi-
plexing scheme based on A0, -CE1, -CE2 allows 8 bit hosts to access
all data on D0-D7. See Tables 4-11, 4-12, 4-15, and 4-16.
-CE1, -CE2
(PC Card I/O Mode)
Card Enable
This signal is the same as the PC Card Memory Mode signal.
-CS0, -CS1
(True IDE Mode)
In the True IDE Mode -CS0 is the chip select for the task file registers
while -CS1 is used to select the Alternate Status Register and the
Device Control Register.