AS1108
Datasheet - Detailed Description
Table 10. Code-B Font (Continued)
Register Data
On Segments = 1
7-Segment
Character
D7 †
D6:D4
D3
0
D2
1
D1
1
1
0
0
1
1
0
0
D0 DP †
A
1
1
1
1
0
1
0
0
1
0
B
0
1
1
1
0
0
1
0
1
0
C
1
1
1
1
0
0
1
0
0
0
D
1
0
1
1
0
1
0
1
0
0
E
1
0
1
0
0
1
1
1
1
0
F
1
0
1
1
0
1
1
1
1
0
G
1
0
1
1
1
1
1
0
1
0
6
7
8
9
-
E
H
L
P
X
X
X
X
X
X
X
X
X
X
0
1
0
1
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
Blank
1
1
† The decimal point is enabled by setting bit D7 = 1.
Table 11. HEX Font
Register Data
On Segments = 1
7-Segment
Character
D7 † D6:D4
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DP †
A
1
0
1
1
0
1
1
1
1
1
1
0
1
0
1
1
B
1
1
1
1
1
0
0
1
1
1
1
0
0
1
0
0
C
1
1
0
1
1
1
1
1
1
1
1
1
0
1
0
0
D
1
0
1
1
0
1
1
0
1
1
0
1
1
1
1
0
E
1
0
1
0
0
0
1
0
1
0
1
1
1
1
1
1
F
G
0
0
1
1
1
1
1
0
1
1
1
1
0
1
1
1
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
0
0
0
1
1
1
0
1
1
1
1
1
0
1
1
† The decimal point is enabled by setting bit D7 = 1.
Table 12. No-Decode Mode Data Bits and Corresponding Segment Lines
D7
D6
D5
D4
D3
D2
D1
D0
Corresponding Segment Line
DP
A
B
C
D
E
F
G
Display-Test Register (0xXF)
The AS1108 can operate in two modes: normal mode and display test mode. In display test mode all LEDs are
switched on at maximum brightness (duty cycle is 15/16). The device remains in display-test mode until the Display-
Test Register is set for normal operation.
Note: All settings of the Digit- and Control-Registers are maintained.
Table 13. Display-Test Register Format (Address (HEX) = 0xXF))
Register Data
Mode
D7
X
X
D6
X
X
D5
X
X
D4
X
D3
X
D2
X
D1
X
D0
0
Normal Operation
Display Test Mode
X
X
X
X
1
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