Easy xLogic, User Manual

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4
4 4
4.4.20
.4.20 .4.20
.4.20 Shift
Shift Shift
Shift register
register register
register
Short Short Short Short description description description description
The shift register function can be used to read an input value and to shift the bits. The output
value corresponds with the configured shift register bit. The shift direction can be changed at a
special input.
Timing Timing Timing Timing diagram diagram diagram diagram
Connection Connection Connection Connection Description Description Description Description
Input In In In In The function when started
reads this input value.
Input Trg Trg Trg Trg The SFB is started with a
positive edge (0 t 1
transition) at input Trg
(Trigger). A 1 to 0
transition is irrelevant.
Input Dir
Dir Dir
Dir You define the shift
direction of the shift
register bits S1...S8 at
the Dir input:
Dir = 0: shift up (S1 >>
S8)
Dir = 1: shift down (S8
>> S1)
Parameter Shift Shift Shift Shift register register register register bit bit bit bit that
determines the value of
output Q.
Possible settings: S1 ...
S8
Retentivity Retentivity Retentivity Retentivity set (on) =
the status is retentive in
memory.
Output Q Q Q Q The output value
corresponds with the
configured shift register
bit.