Specifications

171
A
A
K
K
7
7
3
3
-
-
1
1
3
3
9
9
4
4
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
Glossary
A
A
P
P
M
M
Unlike ACPI, BIOS controls most APM power management functions. AOpen Suspend to Hard
Drive is a good example of APM power management.
A
A
T
T
A
A
/
/
6
6
6
6
ATA/66 uses both rising edge and falling edge but doubles UDMA/33 transfer rate. The data
transfer rate is 4 times of the PIO mode 4 or DMA mode 2, 16.6MB/s x4 = 66MB/s. To use
ATA/66, you need special ATA/66 IDE cable.
A
A
T
T
A
A
/
/
1
1
0
0
0
0
ATA/100 is a new IDE specification under developing. ATA/100 uses both rising edge and falling
edge as ATA/66
but clock cycle time is reduced to 40ns. The data transfer rate is (1/40ns) x 2
bytes x 2 = 100MB/s. To use ATA/100, you need special 80-wire IDE cable, the same as ATA/66.