SCE5742 View Datasheet(PDF) - OSRAM GmbH
Part Name
Description
MFG CO.
'SCE5742' PDF : 16 Pages View PDF
SCE5740, SCE5741, SCE5742, SCE5743, SCE5744, SCE5745
Cascading Multiple Displays using only the SCE574x.
RST
VCC
RST
CLK I/O CLK SEL
Intelligent Display
DATA
SDCLK
LOAD
DATA
SDCLK
14 more displays
in between
RST
CLK I/O CLK SEL
Intelligent Display
DATA
SDCLK
LOAD
A0
0
A1
A2
A3
Address
Decoder
Chip 15
LD
CE
Address Decode 1-14
IDCD5030
Multiple displays can be cascaded using the CLK SEL and CLK I/O pins (Figure „Cascading Multiple Displays using only the SCE574X“
(page 13)). The display designated as the MasterClock source should have its CLK SEL pin tied high and the slaves should have their
CLK SEL pins tied low. All CLK I/O pins should be tied together. One display CLK I/O can drive 15 slave CLK I/Os. Use RST to synchro-
nize all display counters.
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. Display 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 “ABCD”
Step
A
B (optional)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
D7 D6
D5
D4 D3
D2
D1
D0 Function
1
1
0
0
0
0
0
0
CLEAR
1
1
1
0
0
0
0
0
100% BRIGHTNESS
1
0
1
0
0
0
0
0
DIGIT D0 SELECT
0
0
0
0
0
1
0
0
ROW 0 (A)
0
0
0
0
1
0
1
0
ROW 1 (A)
0
0
0
1
0
0
0
1
ROW 2 (A)
0
0
0
1
1
1
1
1
ROW 3 (A)
0
0
0
1
0
0
0
1
ROW 4 (A)
0
0
0
1
0
0
0
1
ROW 5 (A)
0
0
0
1
0
0
0
1
ROW 6 (A)
1
0
1
0
0
0
0
1
DIGIT D1 SELECT
0
0
0
1
1
1
1
1
ROW 0 (B)
0
0
0
1
0
0
0
1
ROW 1 (B)
0
0
0
1
0
0
0
1
ROW 2 (B)
0
0
0
1
1
1
1
0
ROW 3 (B)
0
0
0
1
0
0
0
1
ROW 4 (B)
0
0
0
1
0
0
0
1
ROW 5 (B)
0
0
0
1
1
1
1
1
ROW 6 (B)
1
0
1
0
0
0
1
0
DIGIT D2 SELECT
0
0
0
0
0
1
1
1
ROW 0 (C)
0
0
0
0
1
0
0
0
ROW 1 (C)
0
0
0
1
0
0
0
0
ROW 2 (C)
0
0
0
1
0
0
0
0
ROW 3 (C)
0
0
0
1
0
0
0
0
ROW 4 (C)
0
0
0
0
1
0
0
0
ROW 5 (C)
0
0
0
0
0
1
1
1
ROW 6 (C)
1
0
1
0
0
0
1
1
DIGIT D3 SELECT
0
0
0
1
1
1
1
0
ROW 0 (D)
0
0
0
1
0
0
0
1
ROW 1 (D)
0
0
0
1
0
0
0
1
ROW 2 (D)
0
0
0
1
0
0
0
1
ROW 3 (D)
0
0
0
1
0
0
0
1
ROW 4 (D)
0
0
0
1
0
0
0
1
ROW 5 (D)
0
0
0
1
1
1
1
0
ROW 6 (D)
2006-03-30
13
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