DDR2: chip bits definition in local_addr[]

A signal local_addr exists neither with the stated width nor with the exact name at the DDR2 HP controller interface (also not internally, as far as I know). So far the documentation is incorrect to my opinion. Let's say, local_addr is a virtual signal.

At the controller interface, a signal local_address is present. But it has alreay been reduced by the one or two column address LSB bits, so for a 2 GByte respectively 256M x 64 DIMM module, that uses 28 address bits internally (=log2(256M) ) local_address has 27 bits for a full rate or 26 bits for a half rate controller. I'm using a DIMM module of same size and organisation with a half rate controller, and it has local_address[25:0]