
4Ć49FST Configuration
Original Ć June 1990 CE4.2:CL6211
BDET BDET
13
INSTRUCTION NAME: BDET (bi-directional edge trigger)
DESCRIPTION: This instruction sets the SVD output to a 1 when the SVD input
changes from 0 to 1. The SVD output remains at 1 for one execution (cycle) of
the FST and then returns to 0. When the SVD input changes from 1 to 0, the
SVD output is again set to 1 and remains at 1 for one execution of the FST.
The SVD output then returns to 0. The SVA input remains unchanged.
GRAPHIC REPRESENTATION: SYMBOLIC REPRESENTATION:
1
0
t
0
t
1
INPUT
1
0
OUTPUT
tt
t
432
t
5
t
!
1 2 3 4 IS THE TIMEt,t
!
t
t
0
t
1
tt
t
432
t
5
OF ONE EXECUTION OF THE FST
CONFIGURATION FORMAT: BDET (
Comment >>
OPERAND DESCRIPTIONS:
Comment - A comment up to 255 characters long.
FUNCTION EQUATIONS:
If SVD(in) <> SVD(in) last cycle
Then SVD(out) = 1
If SVD(in) = SVD(in) last cycle
Then SVD(out) = 0
SVA(out)=SVA(in)
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