Advanced Chipset Features; Figure 4.4: Advanced Chipset Features Screen; Dram Timing Selectable; Cas Latency Time - Advantech MR6550 User Manual

4.5 Advanced Chipset Features

This screen appears when choosing the "Advanced Chipset Features"
item from the "Initial Setup Screen" menu. It allows the user to configure
the system chipset according to their particular requirements. Below are
some major items that are provided in the Advanced Chipset Features
screen.

Figure 4.4: Advanced Chipset features screen

4.5.1 DRAM Timing Selectable

This option refers to the method by which the DRAM timing is selected.
The default is By SPD.

4.5.2 CAS Latency Time

You can configure CAS latency time in HCLKs as 2 or 2.5 or 3. The sys-
tem board designer should set the values in this field, depending on the
DRAM installed. Do not change the values in this field unless you change
specifications of the installed DRAM or the installed CPU.

4.5.3 Active to Precharge Delay

The default setting for the Active to Precharge Delay is 7.
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