When using ECC, a 48-bit or 72-bit data width is required.
If 16-bit wide components are desired, can the last 8 bits be handled by a x8 device?
Component interfaces should be created with the same component for all components in the interface.
x16 components have a different number of bank groups than the x8 components.
For example, a 72-bit wide component interface should be created by using nine x8 components or five x16 components where half of one component is not used.
Four x16 components and one x8 component is not permissible.