UM0460

Using the front panel evaluation board

17/23

3.7.1

CHANNEL selection

If the previous key pressed is CH_UP or CH_DOWN, then on pressing the 'OK' key, the

displayed channel number on the LED display is selected in the system. The channel

number blinks three times indicating the selection of the channel number as shown in

Figure 7.

After selection of the channel number the system enters into the default display sequence.

Note:

1

'OK' must be pressed to select the channel number in the system.

2

After pressing the 'OK' key the channel number is stored in the system and on the next

power-up of the system, the same channel number is selected.

3.7.2

BRIGHTNESS selection

If the previous key pressed is 'BRGHT +' or 'BRGHT -' then on pressing the 'OK' key, the

displayed brightness level on the LED display is selected for the system.

After selection of the brightness level, the system enters into the default display sequence.

Note:

1

'OK' must be pressed to select the brightness level of the display of the system.

2

After pressing the 'OK' key, the brightness level of the display is stored in the system and on

the next power-up, the system wakes up with the same brightness level of the display.

3.7.3

Display MODE selection

If the previous key pressed is 'MENU' then on pressing the 'OK' key, the pattern on the LED

display is selected for the system. The system remains in the same display pattern until

some other pattern or brightness level is selected or the system is powered up again.

Note:

1

'OK' must be pressed to select the display pattern of the system.

2

On every power-up, the system wakes up with the default display pattern (constant display -

constant BAR) and with the last selected brightness level.

3.7.4

DEMO MODE selection

When the DEMO key is pressed, the system enters the DEMO mode. The system can exit

the DEMO mode only by pressing the 'OK' key.

On pressing the 'OK' key the system exits the DEMO mode and enters into the default

display sequence.

Note:

1

All keys except the 'OK' and 'RESET' key are disabled in the DEMO mode.

2

No action is performed if the 'OK" key is pressed when the system is in default display

sequence.

3.8

RESET

A 'RESET' switch is provided on the back side of the evaluation board. On pressing the

'RESET" switch all the ongoing functions are interrupted and the system starts from the

initial status. The system behaves as if it has been powered up again.