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CPO vs automatic calibration for DDR2

Question asked by Dallas Clow on Jun 28, 2020
Latest reply on Jun 29, 2020 by Bulat Karymov

The CPO parameter in the TIMING_CFG_2 register indicates that this parameter is an override and the reference manual also seems to indicate that that this parameter (CAS-to-preamble) is calibrated automatically at POR.  Is the CPO parameter required or is calibration automatic?  What controls use of the CPO paramter vs the automatically calibrated POR value?  Our design uses an MPC8610 and 64-bit DDR2 with ECC.  If CPO is required, can the t_DLY_CHIP values from table 9 of AN2583 be provided for the MPC8610?