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Page Title:
Figure 3. Truth tables device type 09 |
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|  MIL-M-38510/13G
DEVICE TYPE 09 TRUTH TABLE
Inputs at time tn
Outputs at time Tn+1
Count Count
up
down Load
A
B
C
D
Clear
Carry
Borrow
QA
QB
QC
QD
H
H
H
X
X
X
X
L
NC
NC
NC
NC
H
H
H
H
H
X
X
X
X
H
L
L
L
L
H
H
Count
Count Count
Count
up
down
up
down
L if count = 15
L if count = 0
H
L
X
X
X
X
L
A
B
C
D
NC
NC
H
H if count > 15
H if count ≠ 0
Previous count plus 1
L if count = 15
P
H
H
X
X
X
X
L
NA
NC
NA
(note 1)
H if count > 15
Previous count minus 1
L is count = 0
H
P
H
X
X
X
X
L
NA
NC
NA
(note 2)
H if count ≠ 0
NOTES:
1. See up count sequence table.
2. See down count sequence table.
3.
L = VIL for inputs, VOL for outputs.
4.
H = VIH for inputs, VOH for outputs.
5.
X = VIH or VIL.
6.
NC = no change.
7.
NA = not applicable.
8.
P = Positive going pulse.
FIGURE 3. Truth tables - Continued.
28
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