ID:15960 ADD_PHASE_TRANSFER_REG parameter of DQS_ENABLE_CONTROL primitive "<name>" must be set to the opposite setting of INVERT_PHASE parameter if USE_PHASECTRLIN parameter is FALSE, INVERT_PHASE is not set to DYNAMIC, ADD_PHASE_TRANSFER_REG parameter

CAUSE: The ADD_PHASE_TRANSFER_REG parameter of the specified DQS_ENABLE_CONTROL primitive is set to an illegal value. If the ADD_PHASE_TRANSFER_REG parameter is TRUE, then the INVERT_PHASE parameter must be set to FALSE and vice versa if the following conditions are met:

• use_phase_ctrlin is set to FALSE and
• invert_phase is not set to dynamic and
• add_phase_transfer_reg is not set to dynamic and
• level_dqs_enable is set to TRUE and
• dqsenablin input signal is not VCC or GND and
• the sources clocks phase is within +1 or -1 delay buffer.

To determine the source's clock phase, use the following conditions:

• if phase_setting is set to 0 and invert_phase is set to add_phase_transfer_reg, then phase difference = 0 (definite violation)
• if phase_setting is set to 0 and invert_phase is not set to add_phase_transfer_reg, then phase difference = 3 to 8 (definitely not a violation)
• if phase_setting is in the inclusive range [1, DLL_delay_chain_length/2] and invert_phase is set to add_phase_transfer_reg, then phase difference = phase_setting
• if phase_setting is in the range (DLL_delay_chain_length/2 .. 7] and invert_phase is set to add_phase_transfer_reg, then phase difference = (phase_setting - DLL_delay_chain_length)
• if invert_phase is not set to add_phase_transfer_reg, then phase difference = (phase_setting - DLL_delay_chain_length/2)