SI4844-B-DEMO Datasheet, PDF (11/18 Pages) Silicon Laboratories – Si4844-B DEMO BOARD USERS GUIDE

Si4844-B-DEMO
4.2.1. MCU Setting Band Property
The demo board provides the function that the band property can be set by MCU. The band property includes:
Band top
Band bottom
De-emphasis (only for FM)
Channel space (only for AM)
The setting menu is illustrated in Figure 4.
To set the band properties, follow these steps:
1. Press the SETTING button to enter the setting menu and select the item to be set. The selected item
flashes for 1 second, then automatically switches to its current value.
2. While the value is flashing, press the DOWN/VOL– or UP/VOL+ button to set the desired value within 3
seconds.
3. Repeat step 1 and 2 to finish setting the band properties.
4. When the band properties are set, the MCU automatically quits the setting menu if there is no operation
within 3 seconds.
5. In FM working mode, press the DE/SPC button to set the De-emphasis 50 µs or 75 µs.
6. In AM working mode, press the DE/SPC button to set the Channel Space 9 kHz or 10 kHz.
SETTING MENU:
1 Band Top
2 Band Bottom
3 TONE/VOL MODE
4 Tuning preference
a Bass/Treble MODE
b Dig-Vol MODE
c MIX MODE1
d MIX MODE2
a preference1
b preference2
c preference3
d preference4
Figure 4. Setting Menu
Rev. 0.1
11