 2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA

SCD5580/1/2/3/4 A

www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)

OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany

www.osram-os.com • +49-941-202-7178

8

March 23, 2000-18

Table 2. Load Character Address

Table 3. Load Column Data

The user can activate four Control functions. These include:

LED Brightness Level, Lamp Test, IC Power Down, or Display

Clear. OPCODEs and five bit words are used to initiate these

functions. The OPCODEs and Control Words for the Character

Address and Loading Column Data are shown in Tables 2 and 3.

The user can select seven specific LED brightness levels,

Table 4. These brightness levels (in percentages of full bright-

duty factor of the row strobe pulse.

The SCD558XA offers a unique Display Power Down feature

as shown in Table 5, the display is set to 0% brightness and the

internal multiplex clock is stopped. When in the Power Down

mode data may still be written into the RAM. The display is

reactivated by loading a new Brightness Level Control Word

into the display.

Figure 9. Row and Column Location

Op code

D7 D6 D5

Character Address

D4 D3 D2 D1 D0

Hex

Operation

Load

1

0

1

0

0

0

0

0

A0

Character 0

1

0

1

0

0

0

0

1

A1

Character 1

1

0

1

0

0

0

1

0

A2

Character 2

1

0

1

0

0

0

1

1

A3

Character 3

1

0

1

0

0

1

0

0

A4

Character 4

1

0

1

0

0

1

0

1

A5

Character 5

1

0

1

0

0

1

1

0

A6

Character 6

1

0

1

0

0

1

1

1

A7

Character 7

Op code

D7 D6 D5

Column Data

D4 D3 D2 D1 D0

Operation Load

0

0

0

C0 C1 C2 C3 C4

Row 0

0

0

1

C0 C1 C2 C3 C4

Row 1

0

1

0

C0 C1 C2 C3 C4

Row 2

0

1

1

C0 C1 C2 C3 C4

Row 3

1

0

0

C0 C1 C2 C3 C4

Row 4

off LED

on LED

Row 0

Row 1

Row 2

Row 3

Row 4

0 1 2 3 4

Columns

Previously “on” LED

Table 4. Display Brightness

Table 5. Power Down

serial shift register. This Control Word sets all of the LEDs to a

53% brightness level. Operation of the Lamp Test has no affect

on the RAM and is cleared by loading a Brightness Control Word.

Table 6. Lamp Test

Address Register and the RAM. The display is blanked and the

Character Address Register will be set to Character 0. The

internal counter and the Control Word Register are unaffected.

The Software Clear will remain active until the next data input

cycle is initiated.

Table 7. Software Clear

Op code

D7 D6 D5

Control Word

D4 D3 D2 D1 D0

Hex

Operation

Level

1

1

1

1

0

0

0

0

F0

100%

111

100

0

1

F1

53%

111

100

1

0

F2

40%

111

100

1

1

F3

27%

111

101

0

0

F4

20%

111

101

0

1

F5

13%

1

1

1

1

0

1

1

0

F6

6.6%

Op code

D7 D6 D5

Control Word

D4 D3 D2 D1 D0

Hex

Operation

Level

111

111

1

1

FF

0%

brightness

Op code

D7 D6 D5

Control Word

D4 D3 D2 D1 D0

Hex

Operation

Level

1

1

1

1

0

B

B

B

Lamp Test

(OFF)

1

1

1

1

1

0

0

0

F8

Lamp Test

(ON)

Op code

D7 D6 D5

Control Word

D4 D3 D2 D1 D0

Hex

Operation

Level

1

1

0

0

0

0

0

0

C0

CLEAR