So why do we want to “play” with RTL/IOL Init Value instead of the actual tRTL/tIOL values? The reason is that RTL/IOL Init value is the baseline for CPU to begin the memory training. The CPU will start fill up the actual tRTL/tIOL value based on the init values. If the signal ever goes too strong or weak, CPU can still slightly modify the actual tRTL/tIOL (range is usually +/- 1) so to …
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