Si4822/26-DEMO

Rev. 0.1

9

4. Operation

The Si4822/26-DEMO board, a complete analog tune and digital display radio, provides two major modes of

operation: Time mode and FM/AM/SW Radio mode.

4.1. Time Mode

Place two AAA batteries into the battery compartment. The board will automatically enter Time mode and display

the time.

The demo board display in Time mode is illustrated in Figure 1.

4.1.1. Time Setting

The time default value is 00:00 and can be set to the correct time manually when needed.

1. In Time mode, press the BASS/TMR button to enter the setting menu. The default is to set the minute item

first. Press this button again to select the hour item. The selected item flashes.

2. While the selected item is flashing, press the DOWN/VOL- and UP/VOL+ button to set the desired time.

3. When you have finished setting the time, press BASS/TMR button to quit the setting menu. The MCU will

automatically quit the setting menu if there is no operation within 2 seconds.

4.1.2. Alarm Setting

1. In Time mode, press the TREBLE/AL button to enable or disable the alarm function and to enter the setting

menu automatically when the alarm is enabled. Once you have entered the setting menu, the default is to

set the minute item first. Pressing this button again will select the hour item. The selected item flashes.

2. While the selected item is flashing, press the DOWN/VOL- and UP/VOL+ button to set the desired time.

3. When you have finished the alarm setting, press TREBLE/AL button to quit the set menu. The MCU will

automatically quit the setting menu if there is no operation within 2 seconds.

4. If the alarm is enabled and the alarm setting time is matched, the radio will be automatically turned on after

the buzzer sounds for 5 seconds.

5. The radio will be turned off and the demo board will go into sleep mode automatically if there is no

operation on the push buttons within 15 minutes; if there is any operation on the push buttons, the auto-

sleep function will be disabled. The radio keeps working throughout this time.