SCD55100A, SCD55101A, SCD55102A, SCD55103A, SCD55104A

2006-02-20

14

Loading Data Into the Display

Use following procedure to load data into the display:

1.

Power up the display.

2.

Bring RST low (600 ns duration minimum) to clear the Multi-

plex Counter, Address Register, Control Word Register,

User Ram and Data Register. The display will be blank. Dis-

play brightness is set to 100%.

3.

If a different brightness is desired, load the proper brightness

opcode into the Control Word Register.

4.

Load the Digit Address into the display.

5.

Load display row and column data for the selected digit.

6.

Repeat steps 4 and 5 for all digits.

Data Contents for the Word “Displays”

Step

D7

D6

D5

D4

D3

D2

D1

D0

Function

A

B (optional)

11

0

11

1

00

0

0

0

10

B

B

B

CLEAR

BRIGHTNESS SELECT

1

2

3

4

5

6

10

1

00

0

00

1

01

0

01

1

10

0

10

0

0

0

11

1

1

0

10

0

0

1

10

0

0

1

10

0

0

1

11

1

1

0

DIGIT D0 SELECT

ROW 0 D0 (D)

ROW 1 D0 (D)

ROW 2 D0 (D)

ROW 3 D0 (D)

ROW 4 D0 (D)

7

8

9

10

11

12

10

1

00

0

00

1

01

0

01

1

10

0

10

0

0

1

01

1

1

0

00

1

0

0

00

1

0

0

00

1

0

0

01

1

1

0

DIGIT D1 SELECT

ROW 0 D1 (I)

ROW 1 D1 (I)

ROW 2 D1 (I)

ROW 3 D1 (I)

ROW 4 D1 (I)

13

14

15

16

17

18

10

1

00

0

00

1

01

0

01

1

10

0

10

0

1

0

01

1

1

1

10

0

0

0

01

1

1

0

00

0

0

1

11

1

1

0

DIGIT D2 SELECT

ROW 0 D2 (S)

ROW 1 D2 (S)

ROW 2 D2 (S)

ROW 3 D2 (S)

ROW 4 D2 (S)

19

20

21

22

23

24

10

1

00

0

00

1

01

0

01

1

10

0

10

0

1

1

11

1

1

0

10

0

0

1

11

1

1

0

10

0

0

0

10

0

0

0

DIGIT D3 SELECT

ROW 0 D3 (P)

ROW 1 D3 (P)

ROW 2 D3 (P)

ROW 3 D3 (P)

ROW 4 D3 (P)

25

26

27

28

29

30

10

1

00

0

00

1

01

0

01

1

10

0

10

1

0

0

10

0

0

0

10

0

0

0

10

0

0

0

10

0

0

0

11

1

1

1

DIGIT D4 SELECT

ROW 0 D4 (L)

ROW 1 D4 (L)

ROW 2 D4 (L)

ROW 3 D4 (L)

ROW 4 D4 (L)

31

32

33

34

35

36

10

1

00

0

00

1

01

0

01

1

10

0

10

1

0

1

00

1

0

0

01

0

1

0

11

1

1

1

10

0

0

1

10

0

0

1

DIGIT D5 SELECT

ROW 0 D5 (A)

ROW 1 D5 (A)

ROW 2 D5 (A)

ROW 3 D5 (A)

ROW 4 D5 (A)

37

38

39

40

41

42

10

1

00

0

00

1

01

0

01

1

10

0

1

011

0

1

000

1

0

101

0

0

010

0

0

010

0

0

010

0

DIGIT D6 SELECT

ROW 0 D6 (Y)

ROW 1 D6 (Y)

ROW 2 D6 (Y)

ROW 3 D6 (Y)

ROW 4 D6 (Y)

43

44

45

46

47

48

10

1

00

0

00

1

01

0

01

1

10

0

10

1

1

1

01

1

1

1

10

0

0

0

01

1

1

0

00

0

0

1

11

1

1

0

DIGIT D7 SELECT

ROW 0 D7 (S)

ROW 1 D7 (S)

ROW 2 D7 (S)

ROW 3 D7 (S)

ROW 4 D7 (S)

Note:

If the display is already reset at Power Up, there is no need for Software Clear.