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User’s Manual
ECM-CX700 Series User’s Manual
63
3.5.3.1 DRAM Clock/Drive Control
This section can set the DRAM clock/driver timing.
Item
Options
Description
DRAM Clock
By SPD
100NHz
133 MHz
166 MHz
200 MHz
266 MHz
Set the memory bus frequency to operate at
various values for the proper memory clock
setting
DRAM Timing
Manual
Auto By SPD
Set the memory timings for the said timings or
DRAM Cycle Lengths of 2 or 2.5.
SDRAM CAS Latency
1.5/2
2/3
2.5/4
3/5
This controls the time dealy passing before the
SDRAM starts to carry out a read command after
receiving it.
Bank Interleave
Diabled
2 Bank
4 Bank
8 Bank
Enables to set the interleave mode of the SDRM
interface which allows banks of SDRAM to
alternate their refresh and access cycles.
Precharge to Active(Trp)
2T
3T
4T
5T
This item sets the length of time taking to
precharge a row in the memory module before
a row being active and appears only when
DRAM timing
is set at
Manual
. Longer values
are safer but probably not acting the best
performance.
Active to Precharge(Tras)
05T, 06T, 08T,09T
10T, 11T, 12T, 13T
14T, 15T, 16T, 17T
18T, 19T, 20T
This item sets the length of time that a row
staying active fore precharging and appears only
when
DRAM timing
is set at
Manual
. Longer
values are safer but probably not acting the best
performance.
Active to CMD(Trcd)
2T
3T
4T
5T
This timing controls the length of the delay
between when a memory bank is activated to
when a read/write command is sent to that bank.
REF to ACT/REF to REF(Trfc) 08T, 09T…~70T, 71T
Set the REF to ACT/REF to REF timing.
This field appears when
DRAM Timing
is set at
Manual
.
ACT(0) to ACT(1) (TRRD)
2T
3T
4T
5T
Set the minimum time interval between
successive ACTIVE commands to the different
banks. This field appears when
DRAM Timing
is
set at
Manual
.
Read to Precharge (Trtp)
2T
3T
This bits control the number of clocks that are
inserted between a read command to a row
precharge command to the same rank.
Writ to Read CMD (Twtr)
1T/2T
2T/3T
Allows to set the Write to Read CMD function.
Write Recovery Time (Twr)
2T
3T
4T
5T
Write recovery time is a standard DDR2 timing
parameter minimum time between a write
command
and
subsequent
prechanrge
command to the same bank. The parameter is
programmable on DDR2 SODIMMs and the
value used above must match the largest delay
programmed in any SODIMM in the system.
DRAM Command Rate
2T Command
1T Command
Allows to set the DRAM Command Rate.
RDSAIT Mode
Manual
Auto
Allows to select RSDAIT Mode.
RDSAIT Selection
3
Allows to set RSDAIT selectiion.
Summary of Contents for ECM-CX700
Page 24: ...ECM CX700 24 ECM CX700 Series User s Manual 2 Hardware Configuration...
Page 25: ...User s Manual ECM CX700 Series User s Manual 25 2 1 Product Overview JFAN2...
Page 47: ...User s Manual ECM CX700 Series User s Manual 47...
Page 51: ...User s Manual ECM CX700 Series User s Manual 51 3 BIOS Setup...
Page 90: ...ECM CX700 90 ECM CX700 Series User s Manual 5 Mechanical Drawing...
Page 91: ...User s Manual ECM CX700 Series User s Manual 91 Unit mm...
Page 93: ...User s Manual ECM CX700 Series User s Manual 93 Appendix B AWARD BIOS POST Messages...