Intel® Agilex™ Variable Precision DSP Blocks User Guide

ID 683037
Date 11/17/2022
Public

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4.1.4.1. Dynamic Scanin

When input cascade is used, the source of top multiplier can be dynamically switched between SCANIN and AY by asserting/de-asserting DISABLE_SCANIN input.
Figure 49. Dynamic Scanin
Table 25.  DISABLE_SCANIN Signal Behavior
DISABLE_CHAINOUT Signal Description
Low (0) Source of multiplier input is from SCANIN input.
High (1) Source of multiplier input is switched from SCANIN to AY.

When DISABLE_SCANIN port is used, the input register for this signal will be enabled. The register is driven by free running clock and there is no clock enable or clock clear signal to control this register.