User`s guide

Stack
5-413
5Stack
Purpose Store inputs into a LIFO register.
Library Signal Management / Buffers
Description The Stack block stores a sequence of input samples in a LIFO (last in, first out)
register. The register capacity is set by the
Stack depth parameter, and inputs
can be scalars, vectors, or matrices.
The block pushes the input at the
In port onto the top of the stack when a
trigger event is received at the
Push port. When a trigger event is received at
the
Pop port, the block pops the top element off the stack and holds the Out port
at that value. The last input to be pushed onto the stack is always the first to
be popped off.
A trigger event at the optional
Clr port (enabled by the Clear input check box)
empties the stack contents. If
Clear output port on reset is selected, then a
trigger event at the
Clr port empties the stack and sets the value at the Out
port to zero. This setting also applies when a disabled subsystem containing
the Stack block is re-enabled; the
Out port value is only reset to zero in this case
if
Clear output port on reset is selected.
0101
0000
1001
1111
1101
empty
empty
empty
1100
stack depth
0101
0000
1001
1111
1101
empty
empty
empty
1100
oldest
input
Pus
h
ing t
h
e stac
k
Popping t
h
e stac
k
last in first out
0101
0000
1001
1111
1101
empty
empty
1100