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UM0943
3
System features
3.1
Brightness adjustment through potentiometer
The system is also provided with a potentiometer "BRGHT_ADJ" (R5) which can be used to
vary the brightness of the LEDs by setting the output current. The brightness increases
when the potentiometer is rotated clockwise and decreases with an anti-clockwise rotation.
3.2
Channel number/brightness level display mode
In this mode the system displays the channel number (on the far left, two 7-segment display
modules) and brightness level (on the far right, two displays). Channel number and
brightness can be increased/decreased using the front panel keys provided on the board
(CH+, CH-, BRGHT+, BRGHT-). Similar operations can be performed using remote control
keys, as explained in
The maximum and minimum limits for channel numbers are 99 and 00, while the maximum
and minimum values for brightness level are 16 and 1 (16/16, 1/16).
The brightness level is also shown by the number of discrete LEDs lit up. (1 LED each for 2
levels).
3.3
RTC operation
The STLED325 also features a built-in RTC. The MENU key on the front panel is provided to
select RTC set/view options. Various front panel keys can be used to operate the real time
clock.
Press MENU to enter into and navigate through menu options. Press MENU once - "RTC" is
displayed. Now press OK to enter into RTC options. Now using the MENU key the user can
navigate through "TIME" (view time), "DATE" (view date), "SETT" (set time), "SETD" (set
date), and "SETA" (set alarm).
3.3.1
Display time
Press MENU to go to "RTC" and then OK. "TIME" is displayed and press OK again to go to
view time. "HH.MM" is displayed for a second to signify the time display in hours-minutes
format, followed by current RTC time display with hours and minutes separated by a ".".
Press OK again to exit to the channel-brightness display.
3.3.2
Display date
Press MENU and then OK. Use the MENU key again to reach "DATE" and press the OK key.
"DD.MM" is displayed for a second to signify date display in date-month format after which
the current RTC date is displayed. Date and month data are separated by a ".". Press OK
again to exit to the channel-brightness display.
3.3.3
Set time
Press MENU and then OK. Use MENU key to go to "SETT" and press OK. The system
prompts the user to enter time in "Hours-Minutes" format. Use the front panel keys BRGHT+
www.BDTIC.com/ST
Section
3.5.
Doc ID 17476 Rev 1
System features
9/22
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