AOpen DX37PU-OL-E0112B User Manual page 66

F o r t r e s s 7 7 0 0 / 7
F o r t r e s s 7 7 0 0 / 7
This motherboard supports ATA33,
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
Warning: The specification of the IDE cable is a maximum of 46cm (18 inches);
make sure your cable does not exceed this length.
9 0 0
9 0 0
ATA66 or ATA100 IDE devices. Following table lists the transfer rate of IDE PIO and DMA modes.
Clock Cycle Time
Count
20 600ns
13 383ns
8 240ns
6 180ns
4 120ns
16 480ns
5 150ns
4 120ns
4 120ns
2 60ns
2 40ns
Data Transfer Rate
(1/600ns) x 2byte = 3.3MB/s
(1/383ns) x 2byte = 5.2MB/s
(1/240ns) x 2byte = 8.3MB/s
(1/180ns) x 2byte = 11.1MB/s
(1/120ns) x 2byte = 16.6MB/s
(1/480ns) x 2byte = 4.16MB/s
(1/150ns) x 2byte = 13.3MB/s
(1/120ns) x 2byte = 16.6MB/s
(1/120ns) x 2byte x2 = 33MB/s
(1/60ns) x 2byte x2 = 66MB/s
(1/40ns) x 2byte x2 = 100MB/s
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