Light-Weight - 2.1 English

AXI Register Slice LogiCORE IP Product Guide (PG373)

Document ID
PG373
Release Date
2020-12-04
Version
2.1 English
Revision

Implemented as a simple one-stage pipeline register, this mode minimizes resources while isolating timing paths, but always incurs one bubble cycle following each transfer, resulting in a maximum duty cycle of 50%. This mode is appropriate on AW, AR and B channels, which normally do not require back-to-back transfers, and for all channels operating in AXI4-Lite protocol.

This mode is selected as "Light" in the configuration dialog. Light-weight mode drives registered payload outputs and registered VALID and READY handshake outputs as shown in the figure.

Figure 1. Light-Weight AXI Register Slice Diagram

The figure shows that the Light-Weight mode introduces one latency cycle, with one bubble cycle following each transfer.

Figure 2. Light-Weight Mode Timing Diagram