LS7030_03 Datasheet, PDF (4/4 Pages) LSI Computer Systems – 8 DECADE MULTIPLEXED COUNTER

SCAN RESET INPUT
(RESET TO MSD)
1
8 DIGIT STROBE OUTPUTS
9 8 7 6 54 3 2
LSD
MSD
OUTPUT
BUFFERS
DECIMAL POINT
INPUT
10
BLANKING
F/F
S
RQ
27 Vss
26 _VGG
23 VDD
38 LAMP TEST INPUT
11 BLANK OUT
OSC. INPUT
40
SCAN INPUT
39
1
2
B1
B2
B4
B8
OSCILLATOR
OR
BUFFER
3
B1
B2
B4
B8
R ^{8 STATE STATIC SCAN}
COUNTER & DECODED
C
LSD
MSD
8
7
4
5
6
B1
B2
B4
B8
12 48
G
MUX
GATE
12 48
G
MUX
GATE
12 48
G ^MUX
GATE
12 48
G
MUX
GATE
12 48
G ^MUX
GATE
12 48
G ^MUX
GATE
NZ
B1
B2
B4
B8
12 48
G
MUX
GATE
B1
B2
B4
B8
12 48
G
MUX
GATE
a
SEVEN ^b
SEGMENT ^c
DECODER _d
e
f
g
37
36
34
SEVEN
SEGMENT
33 DATA
31 ^OUT
30
29
B1
DATA
OUTPUT ^B2
BUFFER
B4
B8
20
19 ^BCD
DATA
18 ^OUTPUT
17
LOAD
LATCH
INPUT ²¹
4 BIT
LATCH
ST
4 BIT
LATCH
ST
COUNT
INPUT ₃₂
RESET
INPUT ₂₂
124 8
C BCD
COUNTER
R
1248
C BCD
COUNTER
R
4 BIT
LATCH
ST
4 BIT
LATCH
ST
4 BIT
LATCH
ST
4 BIT
LATCH
ST
4 BIT
LATCH
ST
4 BIT
LATCH
ST
124 8
C BCD
COUNTER
R
12 48
C BCD
COUNTER
R
1248
C BCD
COUNTER
R
124 8
C BCD
COUNTER
R
1248
C BCD
COUNTER
R
1248
C BCD
COUNTER
R
12 OVERFLOW OUTPUT
1 BIT
ST LATCH
13 OVERFLOW INPUT
C
OVFLW
R
F/F
28
TEST COUNT INPUT _{FIGURE 4. LS7030 BLOCK DIAGRAM}
16
D6 OUTPUT
15
D7 OUTPUT
14
D8 OUTPUT
7030-012703-4