Quartus

Verilog HDL syntax error at <location>: illegal character in hexadecimal constant value

CAUSE: In a Verilog Design File (.v) at the specified location, a hexadecimal constant value contains illegal characters, that is, characters other than 0..9, a..f, x, or z.
ACTION: Make sure the constant value contains only 0..9, a..f, x, or z characters.

See also:

Section 2.5 of the IEEE Std. 1364-2001 IEEE Standard Verilog Hardware Description Language manual

- PLDWorld -

 
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