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D
X
P
N
-
U
D
X
P
N
-
U
A
T
A
1
0
0
S
u
p
p
o
r
A
T
A
1
0
0
S
u
p
p
o
r
This motherboard supports
Mode
PIO mode 0
PIO mode 1
PIO mode 2
PIO mode 3
PIO mode 4
DMA mode 0
DMA mode 1
DMA mode 2
DMA MODE3-4 (ATA 66)
DMA MODE5
(ATA 100)
t
e
d
t
e
d
ATA66
or
ATA100
IDE devices. Following table lists the transfer rate of IDE PIO and DMA modes.
Clock Period Clock Count
30ns
20
30ns
13
30ns
8
30ns
6
30ns
4
30ns
16
30ns
5
30ns
4
30ns
2
20ns
2
Cycle Time
Data Transfer Rate
600ns
(1/600ns) x 2byte = 3.3MB/s
383ns
(1/383ns) x 2byte = 5.2MB/s
240ns
(1/240ns) x 2byte = 8.3MB/s
180ns
(1/180ns) x 2byte = 11.1MB/s
120ns
(1/120ns) x 2byte = 16.6MB/s
480ns
(1/480ns) x 2byte = 4.16MB/s
150ns
(1/150ns) x 2byte = 13.3MB/s
120ns
(1/120ns) x 2byte = 16.6MB/s
60ns
(1/60ns) x 2byte x2 = 66MB/s
40ns
(1/40ns) x 2byte x2 = 100MB/s
28
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