SCE5780

2006-01-23

9

The user can activate four Control functions. These include: LED

Brightness Level, IC Power Down, Prescaler, or Display Clear.

OPCODEs and six 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“ and „Load Column Data“.

The user can select eight specific LED brightness levels, Tables

„Display Brightness“. Depending on how D3 is selected either one

(1) for maximum peak current or zero (0) for 12.5% of maximum

peak current in the control word per Table „Display Brightness“, the

user can select 16 specific LED brightness levels. These bright-

ness levels (in percentages of full brightness of the display)

depending on how the user selects D3 can be one (1) or zero (0)

are as follows: 100% (E0

(E2

13% (E5

EF

factor of the row strobe pulse.

The SCE578X offers a unique Display Power Down feature which

reduces I

(Table „Power Down“) the display is set to 0% brightness. 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.

Row and Column Locations for a Character “D”

Load Character Address

Op code

D7 D6 D5

Character Address

D4

D3

D2

D1

D0

Hex

Operation

Load

101

000

0

0

A0

Character 0

101

000

0

1

A1

Character 1

101

000

1

0

A2

Character 2

101

000

1

1

A3

Character 3

101

001

0

0

A4

Character 4

101

001

0

1

A5

Character 5

101

001

1

0

A6

Character 6

101

001

1

1

A7

Character 7

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

0

C0

C1

C2

C3

C4

Row 1

00

0

C0

C1

C2

C3

C4

Row 2

00

0

C0

C1

C2

C3

C4

Row 3

00

0

C0

C1

C2

C3

C4

Row 4

00

0

C0

C1

C2

C3

C4

Row 5

00

0

C0

C1

C2

C3

C4

Row 6

Display Brightness

Op code

D7 D6 D5

Control Word

D4

D3

D2

D1

D0

Hex

Operation

Level

11

1

000

0

0

E0

100%

11

1

000

0

1

E1

53%

11

1

000

1

0

E2

40%

11

1

000

1

1

E3

27%

11

1

001

0

0

E4

20%

11

1

001

0

1

E5

13%

11

1

001

1

0

E6

6.6%

11

1

001

1

1

E7

0.0%

Display Brightness

Op code

D7 D6 D5

Control Word

D4

D3

D2

D1

D0

Hex

Operation

Level

11

1

010

0

0

E8

100%

11

1

010

0

1

E9

53%

11

1

010

1

0

EA

40%

11

1

010

1

1

EB

27%

11

1

011

0

0

EC

20%

11

1

011

0

1

ED

13%

11

1

011

1

0

EE

6.6%

11

1

011

1

1

EF

0.0%

Power Down

Op code

D7 D6 D5

Control Word

D4

D3

D2

D1

D0

Hex

Operation

Level

11

1

011

1

1

EF

0%

brightness

IDXX5191

Row 2

Row 3

Row 4

Row 5

Row 6

01

2

3

4

Previously "on" LED

On LED

Off LED

Columns

Row 0

Row 1