Data Sheet AS1100

Revision 1.32, Oct. 2004

Page 7 of 12

Duty Cycle

D7 D6 D5 D4 D3 D2 D1 D0 Hex Code

1/32 (min on)

XXXX 0 0 0 0

0xX0

3/32

XXXX 0 0 0 1

0xX1

5/32

XXXX 0 0 1 0

0xX2

7/32

XXXX 0 0 1 1

0xX3

9/32

XXXX 0 1 0 0

0xX4

11/32

XXXX 0 1 0 1

0xX5

13/32

XXXX 0 1 1 0

0xX6

15/32

XXXX 0 1 1 1

0xX7

17/32

XXXX 1 0 0 0

0xX8

19/32

XXXX 1 0 0 1

0xX9

21/32

XXXX 1 0 1 0

0xXA

23/32

XXXX 1 0 1 1

0xXB

25/32

XXXX 1 1 0 0

0xXC

27/32

XXXX 1 1 0 1

0xXD

29/32

XXXX 1 1 1 0

0xXE

31/32 (max on) XXXX 1 1 1 1

0xXF

Table 7: Intensity register format (address (hex) = 0xXA)

Register Data

Scan Limit

D7

D6

D5

D4

D3

D2

D1

D0

Hex Code

Display digit 0 only

X

X

X

X

X

0

0

0

0xX0

Display digits 0 & 1

X

X

X

X

X

0

0

1

0xX1

Display digits 0 1 2

X

X

X

X

X

0

1

0

0xX2

Display digits 0 1 2 3

X

X

X

X

X

0

1

1

0xX3

Display digits 0 1 2 3 4

X

X

X

X

X

1

0

0

0xX4

Display digits 0 1 2 3 4 5

X

X

X

X

X

1

0

1

0xX5

Display digits 0 1 2 3 4 5

6

XXX

XX

1

1

0

0xX6

Display digits 0 1 2 3 4 5

6 7

XXX

XX

1

1

1

0xX7

Table 8: Scan-limit register format (address (hex) = 0xXB)

Figure 2: Standard 7-segment LED

DP

A

F

E

D

B

C

G