SCE5742 View Datasheet(PDF) - OSRAM GmbH
Part Name
Description
Manufacturer
SCE5742 Datasheet PDF : 16 Pages
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SCE5740, SCE5741, SCE5742, SCE5743, SCE5744, SCE5745
Loading Serial Character Data
Example: Serial Clock=5.0 MHz, Clock Period=200 ns
352 Clock Cycles, 70.4 µs
a. Character 0 Character 1 Character 2 Character 3
88 Clock Cycles, 17.6 µs
Character 0
Row 0
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
b.
Address Column Data Column Data Column Data Column Data Column Data Column Data Column Data
11 Clock Cycles, 2.2 µs
11 Clock Cycles, 2.2 µs
Character Address OPCODE
Time
Column Data OPCODE
Time
c.
D0 D1 D2 D3 D4
0 0 0 00
D5
1
D6
0
D7
1
Between
Loads
600ns(min)
D0 D1 D2 D3 D4
D DD D D
D5 D6 D7
000
Between
Loads
600ns(min)
LOAD
Serial
Clock
Clock
Period
DATA
d.
D0 D1 D2 D3 D4 D5 D6 D7 Time between Loads
t0
Table „Character ’D’“ (page 8) shows the Row Address for the
example character “D.” Column data is written and read asynchro-
nously from the 140 bit RAM. Once loaded the internal oscillator
and character multiplexer reads the data from the RAM. These
characters are row strobed with column data as shown in Figures
„Row and Columns Locations for a Character ’D’“ (page 8) and
„Row Strobing“ (page 9). The character strobe rate is determined
by the internal or user supplied external MUX Clock, the IC’s
counter and the prescaler.
Character “D”
Op code
Column Data
Hex
D7 D6 D5 D4 D3 D2 D1 D0
C0 C1 C2 C3 C4
Row 0 0 0 0
1 1 1 1 0 1E
Row 1 0 0 0
1 0 0 0 1 11
Row 2 0 0 0
1 0 0 0 1 11
Row 3 0 0 0
1 0 0 0 1 11
Row 4 0 0 0
1 0 0 0 1 11
Row 5 0 0 0
1 0 0 0 1 11
Row 6 0 0 0
1 1 1 1 0 1E
Row and Column Locations for a Character “D”
Row 0
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
0 1234
Columns
Off LED
On LED
IDXX5183
2006-03-30
8
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