SECOnITX-ION
User Manual
- Rev. First Edition: 0.1 - Last Edition: 1.2 - Author: S.B. - Reviewed by G.M.
Copyright © 2011 SECO s.r.l.
SECOnITX-ION
pag. 43
4.7.1.1 Performance Options Submenu
MENU ITEM
Options
Description
CPU BSEL Select
Auto
FSB-533 / FSB-667
This option allows to set System Bus Frequency
System Clock Mode
Auto
Linked
Unlinked
With [Auto], FSB and memory clock are set
automatically.
With [Linked], it is possible to change both Memory
Clock and FSB Clock proportionally
With [Unlinked], Memory Clock and FSB Clock can be
changed independently each other.
FSB
– Memory Ratio
Auto
1:1 / 5:4 / 3:2
Sync Mode
In Linked System Clock Mode, this option will set the
FSB
– Memory Clock Ratio
FSB Clock (MHz)
400 ÷ 2500
Sets FSB frequency for CPU in range from 400 to 2500
MHz. Any value that is not in this range will have no
effect.
!!! Note: System will be in unstable condition if selected
FSB speed is not supported!!!
Memory Timings
Auto
Manual
Allows to select if memory Timings can be set
automatically or have to be set manually. In case
Manually it is chosen, following menu items will appear.
Please be aware in modifying these parameters
manually, since they can lead to system instability.
tCL (CAS Latency)
Auto
5 / 6 / 7 / 8 / 9 / 10 / 11
tRCD
Auto
1 / 2 / 3 / 4 / 5 / 6 / 7
tRP
Auto
1 / 2 / 3 / 4 / 5 / 6 / 7
tRAS
Auto
1 ÷ 31
Command per Clock (CMD)
Auto
1T / 2T
tRRD
Auto
1 ÷ 15
tRC
Auto
1 ÷ 31
tWR
Auto
2 / 3 / 4 / 5 / 6
tWTR
Auto
1 ÷ 15
Burst Length
Auto
4
4.7.1.2 Spread Spectrum Control Submenu
MENU ITEM
Options
Description
CPU Spread Spectrum
Disabled
Enabled
This option allows to enable or disable CPU Spread
Spectrum that allow to reduce EMI of Front Side Bus
