Ropam elektronik BasicGSM 2 - Page 48

Page 44
System configuration
© 2017 Ropam Elektronik
L1÷L8
total value counters, 8 independent
counters
-2 147 483 648 ÷ 2 147 483 647
Logical function
Symbol
Description
Table of truths
AND
logical product: A1÷A8
This is a logic system that performs the following
functions: on the output appears signal '1' if and only
if, when all n input signals have a logical value of '1'.
A1
An
0
0
0
1
1
0
1
1
OR
logical sum: A1÷A8
this is a logical sum circuit, which outputs a signal '1'
if this value has at least one of the signals. This
means that '0' only appears if and only if both signals
are '0'.
A1
An
0
0
0
1
1
0
1
1
NAND
negated logical product (NOT AND): A1÷A8
This is a logical sum circuit which outputs a signal '1',
if this value has n-1 input signals. This means that '0'
appears only then, when all the signals are '1'.
A1
An
0
0
0
1
1
0
1
1
NOR
negated logical sum (NOT OR); A1÷A8
this is a logic system that performs the following
functions: on the output appears signal '1' if and only
if, when all n input signals have a logical value of '0'.
A1
An
0
0
0
1
1
0
1
1
XOR
alternative exclusion: A1÷A8
is a circuit on which output appears signal '1', if and
only if one of the input signals will be '1'. When the
signals are equal to '0' or more than one has a value
of '1' at the output signal will be '0'.
A1
An
0
0
0
1
1
0
1
1
NOT
negation: A1
This is circuit on which output appears signal '1', if
and only if the input has a '0' signal, if on the input will
appear '1' then the output is '0'
A1
0
1
=
assignment; A1
is the circuit which rewrites the value of the input
signal to the output
A1
0
1
+
addition: A1÷A2
function adds arguments and writes the result to the
Lx counter