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Francois Donnet 2000-08-25 10:37:37 +00:00
parent 7156c6781e
commit be59697358
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@ -59,6 +59,7 @@ The logic level behavioural description (.vbe file) uses the same VHDL subset as
Some constraints due to hardware mapping exist. These attributes are only supported by technology mapping onto a standard cell library as \f4sxlib\fP.
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For the register signal description, only one condition statement must appear. STABLE must be strictely used as a negativ motion and joined to clock setup value. Setup can be on high or low value, but it would be worthy to choose it accordingly with hardware register cell.
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\fI# Example\fP
label: BLOCK (NOT ck 'STABLE and ck='1')
BEGIN