TS2GCF300 Transcend Information. Inc., TS2GCF300 Datasheet - Page 41

• Manufacturer Part Number: TS2GCF300
• Description: 300x Compactflash Card
• Manufacturer: Transcend Information. Inc.

T
I/O Transfer Function
Transcend Information Inc.
T
T
S
S
S
Standby Mode
UDMA Write
UDMA Read
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
The I/O transfer to or from the CompactFlash Storage can be either 8 or 16 bits. When a 16 bit accessible
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.
4
4
G
G
G
~
~
~
Function Code
1
1
1
6
6
6
G
G
G
C
C
C
F
F
F
3
3
3
0
0
0
0
0
0
Read
DMA
CMD
Write
No
X
X
X
X
X
X
X
X
Table: PCMCIA Mode I/O Function
-REG
L L
L L
X
H
H
H
H
L
L
L
L
-CE2
H H
H H
H
H
H
X
X
L
L
L
L
-CE1
41
L L
L L
H
H
H
H
H
X
X
L
L
L H
L H
A0
X
X
X
X
X
X
X
L
L
-IORD
H H
L L
X
X
X
H
H
H
L
L
L
-IOWR
H H
L L
X
X
X
H
H
H
L
L
L
300X CompactFlash Card
High Z
Odd Byte
Odd Byte
High Z High Z
Don’t Care
Don’t Care
Odd-Byte
Odd-Byte
Don’t Care
High Z
Odd-Byte
Odd-Byte
D15-D8
High Z
Even Byte
Even Byte
Even-Byte
Odd-Byte
Even-Byte
Odd-Byte
Even-Byte
Even-Byte
Don’t Care
High Z
High Z
Don’t Care
D7-D0