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User’s Manual
ECM-3711 Series User’s Manual
61
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
Turbo
Ultra
Set the memory timings for the said timings or
DRAM Cycle Lengths of 2 or 2.5.
SDRAM CAS Latency
(DDR/DDR2)
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)
5T, 6T, 7T, 8T
9T, 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)
8T, 9T, 10T, 11T,
12T, 13T, 14T, 15T,
16T, 17T, 18T, 19T,
20T, 21T, 22T, 23T,
24T, 25T, 26T
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)
12T
13T
14T
15T
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
Use this option to select Read to Precharge
(Trtp) to set the timing by dram SPD.
Write to Read CMD (Twtr)
2T / 3T
1T / 2T
Use this option to select Write to Read CMD
(Twtr) to set the timing by dram SPD.
Write Recovery Time (Twr)
2T
3T
4T
5T
Use this option to select Write Recovery Time
(Twr) to set the timing by dram SPD.
DRAM Command Rate
2T Command
1T Command
Allows to set the DRAM Command Rate.
RDSAIT mode
Manual
Auto
RDSAIT selection 3
Key in a HEX number (Min = 0000, Max = 003F)