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3
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3
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This motherboard supports Ultra ATA33,
the transfer rate of IDE PIO and DMA modes. The IDE bus is 16-bit, which means every transfer
is two bytes.
Mode
Clock Period
PIO mode 0
30ns
PIO mode 1
30ns
PIO mode 2
30ns
PIO mode 3
30ns
PIO mode 4
30ns
DMA mode 0
30ns
DMA mode 1
30ns
DMA mode 2
30ns
UDMA 33
30ns
UDMA 66
30ns
UDMA100
20ns
Tip: To achieve best performance of Ultra ATA 66/100 hard
disks, a special 80-wires IDE cable for Ultra ATA 66/100 is
required.
ATA66
and
ATA100
Clock
Cycle Time
Count
20
600ns
(1/600ns) x 2byte = 3.3MB/s
13
383ns
(1/383ns) x 2byte = 5.2MB/s
8
240ns
(1/240ns) x 2byte = 8.3MB/s
6
180ns
(1/180ns) x 2byte = 11.1MB/s
4
120ns
(1/120ns) x 2byte = 16.6MB/s
16
480ns
(1/480ns) x 2byte = 4.16MB/s
5
150ns
(1/150ns) x 2byte = 13.3MB/s
4
120ns
(1/120ns) x 2byte = 16.6MB/s
4
120ns
(1/120ns) x 2byte x2 = 33MB/s
2
60ns
(1/60ns) x 2byte x2 = 66MB/s
2
40ns
(1/40ns) x 2byte x2 = 100MB/s
35
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IDE devices. Following table lists
Data Transfer Rate
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