System features
UM0943
10/22
Doc ID 17476 Rev 1
and BRGHT- to increase and decrease the value and CH- and CH+ to move left/right. The
seconds field is taken as 0.
After adjusting the time, press OK. The time is set and the system returns to channel-
brightness display.
3.3.4 Set
date
Press MENU and then OK. Press MENU again multiple times to go to “SETD”. Now press
OK. The system prompts to enter date in “Date-Month” format. Use front panel keys
and Bright- to increase and decrease the value and CH- and CH+ to move left and right.
After adjusting the date press OK again. Now the system prompts to enter year (two digits
“e.g. 10 for 2010” and week day (1- Monday, 2 - Tuesday, etc.). After entering the
information, press OK. The date is set and the system returns to channel-brightness display.
3.3.5 Set
alarm
Press MENU and then OK. Press MENU again multiple times to go to “SETA”. Now press
OK. The system shows the current RTC time and prompts the user to enter Alarm time in
“Hours-Minutes” format. Use front panel keys and Bright- to increase and decrease
the value and CH- and CH+ to move left/right. The seconds' field is taken as 0 and current
RTC date as alarm date automatically. After adjusting the value, press OK again. The alarm
is set and the system returns to channel-brightness display.
3.3.6
Alarm condition display
When the alarm alert is received from the STLED325 internal RTC, “-AL-” is displayed along
with the buzzer sound (tick-tick sound: This buzzer is driven by GPIO1 of the STLED325). In
case the system was in display RTC mode (display RTC time/ RTC date) when the alarm
condition is met, the system display remains at its previous display state (display RTC)
during the alarm while the buzzer still sounds. The alarm goes off when any interrupt is
received (FP key press/RC key press) and the system returns to channel-brightness display.
3.4 Demonstration
mode
The system enters into demonstration mode by pressing the demo key on the front panel. In
this mode scrolling text with varying brightness and increasing scrolling speed is displayed
continuously.
Text displayed: “STLED325 front panel demo” followed by blinking of 325 two times (left
aligned and right aligned).
The system comes out of demo mode and returns to its “channel-brightness” display mode
when either of the front panel or RC keys is pressed or the RTC alarm condition is met.
3.5
Remote control operation
The system currently supports only RC5 protocol; however, it can be easily adapted to
implement other RC protocols. The MENU options support changing the currently used RC
protocol but is not currently implemented in the system. For more details, refer to the data
brief STLED325;
Front panel demonstration board based on the STLED325 and STM8S
.
www.BDTIC.com/ST
