What is the relationship between the operating frequency and CAS latency (CL)?
Even for the same product, the CAS latency differs according to the operating frequency that is used. For example, assuming SDRAM for which 20ns is required until the data is read out after its address is given, • If operating frequency = 100 MHz (1 clock = 10.0ns) >> operation with CAS latency = 2 (CL = 2) results. • If operating frequency = 133MHz (1 clock = 7.5ns) >> operation with CAS latency = 3 (CL = 3) results. For the relationship between the operating frequency and CAS latency of particular products, refer to Relationship Between Frequency and Minimum Latency in the data sheet.
