TDATA Fields - 9.1 English - PG109

Fast Fourier Transform LogiCORE IP Product Guide (PG109)
Document ID
PG109
Release Date
2024-11-13
Version
9.1 English

The Status channel carries the fields in the following table in its TDATA vector.

Table 1. Status Channel TDATA Fields
Field Name Width Padded Description
BLK_EXP 5 Yes - zero extended

Block exponent: The amount of scaling applied. A separate BLK_EXP field is included for each FFT channel that the core has.

Available only when block floating-point is used.

For more information on BLK_EXP, see Block Exponent.
OVFLO 1 No

Arithmetic overflow indicator (active-High): OVFLO is High during result unloading if any value in the data frame overflowed. The OVFLO signal is reset at the beginning of a new frame of data.

A separate OVFLO field is included for each FFT channel that the core has.

This port is optional and only available with scaled arithmetic or single precision floating-point I/O.

For more information on OVFLO , see Overflow.

All fields with padding should be 0 extended to the next 8-bit boundary if they do not already finish on an 8-bit boundary.