36
M
M
K
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7
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7
7
7
M
M
I
I
I
I
O
O
n
n
l
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IDE1 is also known as the primary channel and IDE2 as the secondary channel. Each channel supports two IDE devices that
make a total of four devices. In order to work together, the two devices on each channel must be set differently to
Master
and
Slave
mode. Either one can be the hard disk or the CDROM. The setting as master or slave mode depends on the jumper on
your IDE device, so please refer to your hard disk and CDROM manual accordingly.
This motherboard supports
,
or
DE devices. Following table lists 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 Clock Count Cycle Time Data Transfer Rate
PIO mode 0
30ns
20
600ns
(1/600ns) x 2byte = 3.3MB/s
PIO mode 1
30ns
13
383ns
(1/383ns) x 2byte = 5.2MB/s
PIO mode 2
30ns
8
240ns
(1/240ns) x 2byte = 8.3MB/s
PIO mode 3
30ns
6
180ns
(1/180ns) x 2byte = 11.1MB/s
PIO mode 4
30ns
4
120ns
(1/120ns) x 2byte = 16.6MB/s
DMA mode 0
30ns
16
480ns
(1/480ns) x 2byte = 4.16MB/s
DMA mode 1
30ns
5
150ns
(1/150ns) x 2byte = 13.3MB/s
DMA mode 2
30ns
4
120ns
(1/120ns) x 2byte = 16.6MB/s
ATA33
30ns
4
120ns
(1/120ns) x 2byte x 2 = 33MB/s
ATA66
30ns
2
60ns
(1/60ns) x 2byte x 2 = 66MB/s
ATA100
20ns
2
40ns
(1/40ns) x 2byte x 2 = 100MB/s
ATA133
15ns
2
30ns
(1/30ns) x 2byte x 2 = 133MB/s
Tip:
1. For better signal quality,
it is recommended to set
the far end side device
to master mode and
follow the suggested
sequence to install your
new device. Please refer
to above diagra
m
2.
To achieve the best
performance of Ultra
DMA 66/100/133 hard
disks, a special
80-wires
IDE cable
for Ultra DMA
66/100/133 is required.
Warning:
The specification of the IDE cable is a maximum of 46cm (18 inches);
make sure your cable does not exceed this length.
