Common Memory Transfer Function; True Ide Mode I/O Transfer Function - Transcend CF 80X TS32M~1GCF80 Datasheet

T S 3 2 M ~ 1 G C F
T S 3 2 M ~ 1 G C F
T S 3 2 M ~ 1 G C F
port is addressed, the signal -IOIS16 is asserted by the CompactFlash Storage. Otherwise, the -IOIS16 signal
is de-asserted. When a 16 bit transfer is attempted, and the -IOIS16 signal is not asserted by the CompactFlash
Storage, the system shall generate a pair of 8 bit references to access the word's even byte and odd byte. The
CompactFlash Storage Card permits both 8 and 16 bit accesses to all of its I/O addresses, so -IOIS16 is
asserted for all addresses to which the CompactFlash Storage responds. The CompactFlash Storage Card may
request the host to extend the length of an input cycle until data is ready by asserting the -WAIT signal at the
start of the cycle.
Function Code
Standby Mode
Byte Input Access (8 bits)
Byte Output Access (8 bits)
Word Input Access (16 bits)
Word Output Access (16 bits)
I/O Read Inhibit
I/O Write Inhibit
High Byte Input Only (8 bits)
High Byte Output Only (8 bits)

4.8 Common Memory Transfer Function

The Common Memory transfer to or from the CompactFlash Storage can be either 8 or 16 bits.
Function Code
Standby Mode
Byte Read Access (8 bits)
Byte Write Access (8 bits)
Word Read Access (16 bits)
Word Write Access (16 bits)
Odd Byte Read Only (8 bits)
Odd Byte Write Only (8 bits)

4.9 True IDE Mode I/O Transfer Function

Transcend Information Inc.
8 0
8 0
8 0
Table: PCMCIA Mode I/O Function
-REG -CE2
X
L
L
L
L
L
L
H
H
L
L
Table: Common Memory Function
-REG -CE2
X
H
H
H
H
H
H
H
H
-CE1 A0 -IORD
H H X X
H L L L
H L H L
H L L H
H L H H
L L L L
L L L H
X X X L
X X X H
L H X L
L H X H
-CE1 A0 -OE
H H X X
H L L L
H L H L
H L L H
H L H H
L L X L
L L X H
L H X L
L H X H
33
80X CompactFlash Card
-IOWR D15-D8
X High Z
H High Z
H High Z
L Don't Care
L Don't Care
H Odd-Byte
L Odd-Byte
H Don't Care
L High Z
H Odd-Byte
L Odd-Byte
-WE D15-D8
X High Z
H High Z
H High Z
L Don't Care
L Don't Care
H Odd-Byte
L Odd-Byte
H Odd-Byte
L Odd-Byte
D7-D0
High Z
Even-Byte
Odd-Byte
Even-Byte
Odd-Byte
Even-Byte
Even-Byte
Don't Care
High Z
High Z
Don't Care
D7-D0
High Z
Even-Byte
Odd-Byte
Even-Byte
Odd-Byte
Even-Byte
Even-Byte
High Z
Don't Care
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