TS2GF300 TRANSCEND [Transcend Information. Inc.], TS2GF300 Datasheet - Page 42

• Manufacturer Part Number: TS2GF300
• Description: 300X CompactFlash Card
• Manufacturer: TRANSCEND [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)
2
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.
2
2
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
Write
Read
DMA
CMD
No
X
X
X
X
X
X
X
X
Table: PCMCIA Mode I/O Function
-REG
X
H
H
H
H
L
L
L
L
L
L
L
L
-CE2
H
H
H
H
H
H
H
X
X
L
L
L
L
-CE1
42
H
H
H
H
H
L
L
L
L
L
L
X
X
A0
H
H
X
X
X
L
L
L
L
X
X
X
X
-IORD
X
X
X
H
H
H
H
H
L
L
L
L
L
-IOWR
H
H
H
H
H
X
X
X
L
L
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
V1.1