Control Interface Ports - 1.0 English

RFSoC DFE Fast Fourier Transform LogiCORE IP Product Guide (PG390)

Document ID
PG390
Release Date
2024-05-30
Version
1.0 English
Table 1. Control Stream Ports
Port Name I/O Clock Description
s_axis_ctrl_tdata[15:0] I s_axis_aclk Control word for the DFE FFT core. The format is described in the following table.
s_axis_ctrl_tvalid I s_axis_aclk 'Valid' handshake signal for the control stream interface. The core uses this to indicate the upstream that a new control word is available.
s_axis_ctrl_tready O s_axis_aclk 'Ready' handshake signal for the control stream interface. The core uses this to indicate that a control word can be accepted.
Table 2. Control Word Format
Control field Width Range Description
Point size 4 3:0 Base-2 logarithm of point size for the corresponding data frame (8 = 256 point, ... 12 = 4096 point).

If the value is out of range, event_config_error will be signaled and the control packet will be ignored.

Direction 1 4:4 Transform direction for next frame to be input (0 = inverse FFT, 1 = forward FFT).
Maximum point size 4 8:5

Base-2 logarithm of maximum point size for the corresponding data frame and all subsequent frames.

A value of 0 is taken to mean that the maximum point size should not be changed.

Reserved 7 15:9 Reserved.