Datasheet

SCD55100A, SCD55101A, SCD55102A, SCD55103A, SCD55104A
2008-07-22 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
0000 0
10BB B
CLEAR
BRIGHTNESS SELECT
1
2
3
4
5
6
10 1
000
00 1
01 0
01 1
10 0
10000
11110
10001
10001
10001
11110
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
101
000
001
010
011
100
10001
01110
00100
00100
00100
01110
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
101
000
001
010
011
100
10010
01111
10000
01110
00001
11110
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
101
000
001
010
011
100
10011
11110
10001
11110
10000
10000
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
101
000
001
010
011
100
10100
10000
10000
10000
10000
11111
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
101
000
001
010
011
100
10101
00100
01010
11111
10001
10001
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
101
000
001
010
011
100
10110
10001
01010
00100
00100
00100
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
101
000
001
010
011
100
10111
01111
10000
01110
00001
11110
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.