MIL-M-38510/380B
DEVICE TYPE 03
Operation |
Inputs at time tn |
Outputs at time tn + 1 |
||||||||||||
Clock |
ENP |
ENT |
Load |
A |
B |
C |
D |
U/D |
QA |
QB |
QC |
QD |
RCO |
|
Load |
t |
L |
L |
L |
X |
X |
X |
X |
X |
A |
B |
C |
D |
L if count = 15 H if count * 15 |
Count up |
t |
L |
L |
H |
X |
X |
X |
X |
H |
Previous count plus 1 (note 1) |
L if count = 15 H if count * 15 |
|||
Count down |
t |
L |
L |
H |
X |
X |
X |
X |
L |
Previous count minus 1 (note 2) |
L if count = 0 H if count * 0 |
|||
Inhibit |
t |
H |
L |
H |
X |
X |
X |
X |
X |
No change |
No change |
|||
t |
L |
H |
H |
X |
X |
X |
X |
X |
L |
|||||
t |
H |
H |
H |
X |
X |
X |
X |
X |
L |
|||||
COUNT UP SEQUENCE |
||||
QA |
QB |
QC |
QD |
RCO |
L |
L |
L |
L |
H |
L |
L |
L |
H |
H |
L |
L |
H |
L |
H |
L |
L |
H |
H |
H |
L |
H |
L |
L |
H |
L |
H |
L |
H |
H |
L |
H |
H |
L |
H |
L |
H |
H |
H |
H |
H |
L |
L |
L |
H |
H |
L |
L |
H |
H |
H |
L |
H |
L |
H |
H |
L |
H |
H |
H |
H |
H |
L |
L |
H |
H |
H |
L |
H |
H |
H |
H |
H |
L |
H |
H |
H |
H |
H |
L |
FIGURE 3. Truth tables - Continued.
18
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