HP 5385A User Manual

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Paragraph Dependency Type or Other Subject
8-68
8-72
8-80
8-82
8-84
8-87
8-91
8-94
8-100
8-104
8-117
G,AND
General rules for dependency notation
V, OR
N, Negate, (Exclusive OR)
Z, Interconnection
X, Transmission
C,
Control
S, Set and R, Reset
EN, Enable
M,
Mode
A, Address
8-69. G (AND) DEPENDENCY. A common relation-
ship between two signals is to have them ANDed
together. This has traditionally been shown by explic-
itly
drawing an AND gate with the signals connected
to the inputs of the gate. The 19721EC publication and
the 1973 IEEE/ANSI standard showed several ways to
show this AND relationship using dependency
notation. While nine other forms of dependency
have since been defined, the ways to invoke AND
dependency are now reduced to one.
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8-70.
In Figure 8-5 input b is ANDed with input a and
the complement of b is ANDed with c. The letter G has
been chosen to indicate AND relationships and is
placed at input b, inside the symbol. A number
considered appropriate by the symbol designer (1 has
been used here) is placed after the letter G and also at
each affected input. Note the bar over the 1 at input c.
8-71.
In figure 8-6, output b affects input a with an
AND relationship. The lower example shows that it is
the internal logic state of b, unaffected by the
negation sign, that is ANDed. Figure 8-7 shows input a
to be ANDed with a dynamic input b.
8-72. The rules for G dependency can be summar-
ized thus:
When a Gm input or output (m is a number) stand
at its internal1 state, all inputs and outputs affected
by Gm stand at their normally defined internal
logic states. When the Gm input or output stands at
its 0 state, all inputs and outputs affected by Gm
stand at their internal 0 states .
~~--
c~
=
Figure 8-5. G Dependency Between Inputs
, -++- b a '[ct~]t1---J b -
ro--r-h-
a~ b
-{
---jr- a~-- 1 b = a~- b
a 1 G1 b = - --
--- --
Figure 8-6. G Dependency Between Outputs and Inputs
Figure 8-7. G Dependency with A Dynamic Input
8-11

HP 5385A Specifications

General

Brand	HP
Model	5385A
Category	Cash Counter
Language	English