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Standard function blocks
308
02/16 MN05013001Z EN
Figure 146: Shift register SR..: Forwards operation in BIT mode
a
Initial situation
– SR..EN is not activated, the function block is not active.
– SR..Q7 contains a data bit 1, a 0 is contained in the other
register fields.
b
Transfer of a data bit:
– SR..EN is activated, the function block is active.
– SR..FD has data bit 1.
– With the forwards pulse from SR..FP the register field SR..Q1
shifts the content of all register fields one place forwards and
accepts the 1 from SR..FD.
c
Transfer of a data bit:
– SR..EN is activated, the function block is active.
– SR..FD has data bit 0.
– with the forwards pulse from SR..FP the register field SR..Q1
shifts the content of all register fields one place forwards and
accepts the 0 from SR..FD.
d
Reset of the register:
– SR..EN is activated, the function block is active.
– Activating SR..RE clears the content of the register.
1
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
a b c d
SR...BIT
Shift Register
EN
SR...BIT
Shift Register
EN
RE
FP
FD
RE
FP
FD
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
SR...BIT
Shift Register
EN
RE
FP
FD
SR...BIT
Shift Register
EN
RE
FP
FD
1
1
0
1 1
1
0
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