188.8.131.52.2. Address Generator MSB Indices
Because the MSB index for the uppermost field is implied to be at the MSB of the overall address, it is automatically assigned to AMM_WORD_ADDRESS_WIDTH-1 and does not have a configuration register. Writing to the word address (TG_ADDR_FIELD_MSB_INDEX + n) specifies the MSB index for field n. The system derives the address field widths from the values of the TG_ADDR_FIELD_MSB_INDEX registers. The difference between a field’s MSB index setting and the previous field’s MSB index setting is the field width.
For example, if field 0 has an MSB index of 5 and field 1 has an MSB index of 9, field 0 will span bits 0-5 (inclusive) and field 1 will span bits 6-9 (inclusive), giving field 0 a width of 6 and field 1 a width of 4.
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