ERROR:[DRC 23-20] Rule violation (REQP-21) enum_AREG_2_connects_CEA1_GND_connects_CEA2_GND_connects_CEA1_connects_CEA2
U0_dpd_acl_top/ACL_0/U1/mult_i/bl.DSP48E_2: When the DSP48E1 AREG attribute is set to 2, the CEA1 and CEA2 input pins cannot be unconnected or tied to GND.
CEA1_IN <= CE when (AREG_IN = 1) else '0';
CEB1_IN <= CE when (BREG_IN = 1) else '0';
CEA1_IN <= CE when (AREG_IN = 2) else '0';
CEB1_IN <= CE when (BREG_IN = 2) else '0';