Acer AcerAltos 3102RS, User Manual

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Appendix D Sync. Clock Period & Sync. Clock Frequency D-1
Appendix D Sync. Clock Period &
Sync. Clock Frequency
Changes to the SCSI Synchronous Clock Period of each SCSI target
is a low-level control of the SCSI controller chip. There is no other
selectable option. Only the Synchronous Clock Period is available in
this field.
To calculate the Synchronous Clock Period, refer to the “Sample
equation” to get the correct Synchronous Clock Period.
Sample equation:
Mhz
ns
ns Mhz
8 . 20
10 4 12
1
4 12
1
12
10 4 10 8 . 20
1
4 8 . 20
1
9
9 6
=
× ×
=
×
=
× × ×
=
×
−
−
In this example, where “20.8Mhz” is called the Synchronous Clock
Frequency, and “12” is called the Synchronous Clock Period.
Synchronous
Clock Period
Synchronous
Clock
Frequency
Synchronous
Clock Period
Synchronous
Clock
Frequency
12 20.8 62 4.0
15 16.6 75 3.3
18 13.8 88 2.8
25 10.0 100 2.5