INITP_xx attributes define the initial contents of the memory cells corresponding to DINP/DOUTP buses (parity bits). By default, these memory cells are also initialized to all zeros. The initialization attributes represent the memory contents of the parity bits. The eight initialization attributes are INITP_00 through INITP_07 for the RAMB18E5. The 16 initialization attributes are INITP_00 through INITP_0F for the RAMB36E5. Each INITP_xx is a 64-digit hex-encoded bit vector with a regular INIT_xx attribute behavior. The same formula can be used to calculate the bit positions initialized by a particular INITP_xx attribute.