binary Description

The base 2 number system (radix). Binary digits are 0 and 1.

Binary numbers are indicated with the following notation:

Language: Notation:

AHDL

Language:	Notation:
AHDL	`B"`<series of `0`, `1`, and `X` characters>`"` `X` = "don't care"
VHDL	`2#`<series of `0`, `1`, and `_` characters>`#` Underline ( `_` ) characters inserted between digits act as separators and do not affect the value of the number.
Verilog HDL	`'b`<series of `0`, `1`, and `_` characters> Underline ( `_` ) characters inserted between digits act as separators and do not affect the value of the number.

B"<series of 0, 1, and X characters>"

X = "don't care"

VHDL

2#<series of 0, 1, and _ characters>#

Underline ( _ ) characters inserted between digits act as separators and do not affect the value of the number.

Verilog HDL

'b<series of 0, 1, and _ characters>

Underline ( _ ) characters inserted between digits act as separators and do not affect the value of the number.

Examples:

B"0110X1X10" (AHDL)
2#1111_1111# (VHDL)
'b1111_1111 (Verilog HDL)

- PLDWorld -

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