UM0460

System features

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2

System features

The system has been developed to demonstrate the features of the STLED316S device and

its use in the front panel of set-top boxes. The main features of the system are explained in

this section.

2.1

Selection of channel numbers

The system has the capability to select and display the channel number of the system. The

channel number can be changed by using the CH_UP and CH_DOWN keys of the front

panel. The channel number can be selected using the 'OK' key of the front panel (see

Section 3.1, 3.2 and 3.7).

Note:

1

The information of the selected channel is saved even if the power of the system is OFF.

Whenever the system is powered up, the previous channel is selected.

2

The default channel number in the system is 000.

2.2

Selection of brightness of display

The system has the capability to change the brightness of the LED display of the board. The

brightness of the display can be varied and selected using two methods which are explained

in the following subsections.

2.2.1

Using front panel keys

The brightness of the LED display can be set at any one level by using the 'BRGHT+',

'BRGHT-' and 'OK' keys. At any time any of the 8 brightness level options 1/16, 2/16, 4/16,

10/16, 11/16, 12/16, 13/16, 14/16 can be selected by using these keys.

The brightness of the display can be varied by using the 'BRGHT+' or 'BRGHT-' key of the

front panel. The brightness level of the display can be selected by using the 'OK' key of the

front panel. (seeSection 3.3, 3.4 and 3.7).

2.2.2

Using the potentiometer

A resistance potentiometer (POT 10 k

Ω, R8) has been provided on the board to vary the

brightness of the LED display.

The brightness of the LED display can be decreased by rotating the knob of the

potentiometer clockwise.

The brightness of the LED display can be increased by rotating the knob of the

potentiometer counterclockwise.

Note:

By using the potentiometer the brightness of the display can be set at any level irrespective

of the specified brightness levels of the STLED316S.