Quartus

Reduced register <name> with stuck <name> port to stuck value <number>


CAUSE:

The Compiler reduced the specified register to VCC, GND, or a wire because it reduced the inputs to the register to one of the following combinations, in descending order of priority. You may have specified this condition in the design file, or the condition may be a result of logic synthesis.

Active-Low Clear: Active-Low Preset: Active-High Aload: Active-High Clock Enable: Active-High Clock: Power-up State: D_in: Register Reduces To:
GND GND
VCC GND VCC
GND !Clear
VCC VCC VCC Adata
VCC VCC GND GND Power-up state
VCC VCC GND VCC or GND Power-up state
VCC GND VCC or GND Low GND
VCC GND VCC or GND High VCC
VCC GND GND Low GND
VCC GND GND High VCC
VCC GND Low GND GND
VCC GND High VCC VCC

ACTION: If you intended the register to behave in this manner, no action is required. Otherwise, check the design file for errors and make sure the project's logic does not reduce to any of these combinations.
NOTE: The Compiler reduces JK, SR, and T registers to D registers during logic synthesis.

- PLDWorld -

 

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