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Chapter 3 BIOS Description
44
661M03 Series User Manual
Performance Mode (Default: Disabled)
This option is used to disable or enable performance mode.
DRAM Timing control (Default: By SPD)
This option determines DRAM timing using SPD or manual configuration.
Only set as manual, the following 4 items can be updated.
DRAM CAS Latency (Default: 2.5T)
This option determines CAS Latency. The available setting values are: 2T, 2.5T,
3T.
RAS Active Time (tRAS) (Default: 6T)
This option determines RAS active time. The available setting values are: 4T -
9T.
RAS Precharge Time (tRP) (Default: 3T)
This option is used to define the idel clocks after issusing a precharge com-
mand to the SDRAM.
RAS to CAS Delay (tRCD) (Default: 3T)
This option is used to define the minimum RAS to CAS delay using 1us
granularity.
DRAM Clock/Timing Control Menu