SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The fields AM0 through AM3 control the addressing modes for each of the 4 dimensions. The UTC supports the following addressing modes:
AMX | Meaning |
---|---|
00b | Linear addressing |
01b | CKB0 (Circular Buffer 0 is used) |
10b | CKB1 (Circular Buffer 1 is used) |
11b | Reserved |
Each dimension has its own addressing mode, independent of the other dimensions. This permits any mixture of linear and circular addressing among the 4dimensions.
When a given dimension selects linear addressing, the UTC uses unmodified two's complement arithmetic to update addresses for that loop level.
When a given dimension selects circular addressing via CBK0 or CBK1, the UTC uses the circular address arithmetic described above in the Address Arithmetic with Selectable Linear/Circular Addressing Modes section.