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AS1117

Datasheet - D e t a i l e d D e s c r i p t i o n

When no-decode mode is selected, data bits D7:D0 of the Digit-Registers correspond to the segment lines of the

AS1117. Table 12 on page 15 shows the 1:1 pairing of each data bit to the appropriate segment line.

Figure 25. Standard 7-Segment LED Intensity Control and Inter-Digit Blanking

Table 9. Decode Enable Register Format Examples

Decode Mode

HEX Code

Register Data

D7

D6

D5

D4

D3

D2

D1

D0

No decode for digits 7:0

0x00

000000

0

0

Code-B/HEX decode for digit 0. No decode for digits 7:1

0x01

000000

01

Code-B/HEX decode for digit 0:2. No decode for digits 7:3

0x07

000001

11

Code-B/HEX decode for digits 0:5. No decode for digits 7:6

0x3F

001111

11

Code-B/HEX decode for digits 0,2,5.

No decode for digits 1, 3, 4, 6, 7

0x25

001001

01

Table 10. Code-B Font

Char-

acter

Register Data

Char-

acter

Register Data

Char-

acter

Register Data

D7 D6:D4 D3 D2 D1 D0

D7 D6: D4 D3 D2 D1 D0

D7

D6:D4

D3 D2 D1 D0

X

0

0

0

0

X

01

10

X

11

00

X

0

0

0

1

X

01

11

X

11

01

X

0

0

1

0

X

10

00

X

11

10

X

0

0

1

1

X

10

01

X

11

11

X

0

1

0

0

X

10

10

1

*

XX

X

X

X

X

0

1

0

1

X

10

11

*

The decimal point can be enabled with every character by setting bit D7 = 1.

Table 11. HEX Font

Char-

acter

Register Data

Char-

acter

Register Data

Char-

acter

Register Data

D7 D6:D4 D3 D2 D1 D0

D7 D6: D4 D3 D2 D1 D0

D7

D6:D4

D3 D2 D1 D0

X

0

0

0

0

X

01

10

X

11

00

X

0

0

0

1

X

01

11

X

11

01

X

0

0

1

0

X

10

00

X

11

10

A

B

G

F

E

D

C

DP