SCD55100A, SCD55101A, SCD55102A, SCD55103A, SCD55104A

2006-02-20

9

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 „Load Character

Address“ (page 9) and „Load Column Data“ (page 9).

The user can select seven specific LED brightness levels, Table

„Display Brightness“ (page 9). These brightness levels (in percent-

ages of full brightness of the display) include: 100% (F0

(F1

and 6.6% (F6

ing the duty factor of the row strobe pulse.

Row and Column Location

The SCD5510XA offers a unique Display Power Down feature

which reduces I

shown in Table „Power Down“ (page 9), 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 dis-

play is reactivated by loading a new Brightness Level Control Word

into the display.

The Lamp Test is enabled by loading F8

(page 9), into the 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.

The Software Clear (C0

(page 9), clears the Address Register and the RAM. The display is

blanked and the Character Address Register will be set to Charac-

ter 0. The internal counter and the Control Word Register are unaf-

fected. The Software Clear will remain active until the next data

input cycle is initiated.

Load Character Address

Op code

D7 D6 D5

Character Address

D4 D3

D2

D1

D0

Hex

Operation

Load

10

1

10

0

0

0

B0

Character 0

10

1

10

0

0

1

B1

Character 1

10

1

10

0

1

0

B2

Character 2

10

1

10

0

1

1

B3

Character 3

10

1

10

1

0

0

B4

Character 4

10

1

10

1

0

1

B5

Character 5

10

1

10

1

1

0

B6

Character 6

10

1

10

1

1

1

B7

Character 7

10

1

11

0

0

0

B8

Character 8

10

1

11

0

0

1

B9

Character 9

Load Column Data

Op code

D7 D6 D5

Column Data

D4 D3

D2

D1

D0

Operation Load

00

0

C0 C1

C2

C3

C4

Row 0

00

1

C0 C1

C2

C3

C4

Row 1

01

0

C0 C1

C2

C3

C4

Row 2

01

1

C0 C1

C2

C3

C4

Row 3

10

0

C0 C1

C2

C3

C4

Row 4

IDXX5187

Row 0

Row 1

Row 2

Row 3

Row 4

01

2

3

4

Previously "on" LED

On LED

Off LED

Columns

Display Brightness

Op code

D7 D6 D5

Control Word

D4 D3

D2

D1

D0

Hex

Operation

Level

11

1

10

0

0

0

F0

100%

11

1

10

0

0

1

F1

53%

11

1

10

0

1

0

F2

40%

11

1

10

0

1

1

F3

27%

11

1

10

1

0

0

F4

20%

11

1

10

1

0

1

F5

13%

11

1

10

1

1

0

F6

6.6%

Power Down

Op code

D7 D6 D5

Control Word

D4 D3

D2

D1

D0

Hex

Operation

Level

11

1

11

1

1

1

FF

0%

brightness

Lamp Test

Op code

D7 D6 D5

Control Word

D4 D3

D2

D1

D0

Hex

Operation

Level

11

1

10

B

B

B

Lamp Test

(OFF)

11

1

11

0

0

1

F8

Lamp Test

(OFF)

Software Clear

Op code

D7 D6 D5

Control Word

D4 D3

D2

D1

D0

Hex

Operation

Level

11

0

00

0

0

0

C0

CLEAR