TC7129
FIGURE 4-16:
DISPLAY SEGMENT ASSIGNMENTS
Low Battery
Continuity
BP
BP
1
2
Backplane
Connections
BP
3
Low Battery
Continuity
F
E
DP
4
,
D
4
,
4
4
4
4
3
3
B
C
Continuity
1
,
,
1
,
,
,
A
G
4
A
F
G
D
,
1
1
1
,
B
C
E
BC
DP
D
4
4
E
DP
1
,
,
,
1
1
,
F
3
3
B
C
Low Battery
,
2
2
,
,
,
A
G
A
F
G
E
D
2
3
3
,
,
2
2
,
B
C
MINUS
3
,
DP
2
,
3
2
2
,
,
FIGURE 4-17:
BACKPLANE
WAVEFORMS
FIGURE 4-18:
TYPICAL DISPLAY
OUTPUT WAVEFORMS
V
V
DD
H
b Segment
Line
BP
BP
1
V
V
All Off
L
DISP
V
V
DD
H
a Segment
On
2
d, g Off
V
V
L
DISP
V
V
DD
H
a, g On
d Off
BP
3
V
V
L
DISP
V
V
DD
H
All On
V
V
L
DISP
2002 Microchip Technology Inc.
DS21459B-page 17