SI4844-B-DEMO Datasheet, PDF (7/18 Pages) Silicon Laboratories – Si4844-B DEMO BOARD USERS GUIDE

Si4844-B-DEMO
Table 1. Key Function Description
Button/Mode
Time Mode
FM/AM/SW Radio Mode
POWER/BAND Hold Time _None
< 1s
Tuner Off
Hold Time _{Enable radio}
> 1s
Tuner On
Change between FM, AM, and SW (there
are 2 FM bands, 2 AM bands, and 8 SW
bands)
Disable radio function and enter Time mode.
(Radio parameters will be saved to MCU)
DE/SPC
BASS/TMR
None
FM mode: Change De-emphasis, between
50 µs and 75 µs.
AM mode: Change channel space, between
9 kHz and 10 kHz.
Enter or quit time setting menu. Decrease Bass/Treble level by 1 step.
TREBLE/AL
UP/VOL+
Hold Time
< 1s
Hold Time
> 1s
DOWN/VOL–
Hold Time
< 1s
Hold Time
> 1s
MONO/ST
W/N BAND
SETTING
Hold Time
< 1s
Hold Time
> 1s
Hold Time
< 1s
Hold Time
> 1s
Enable or disable the alarm
function; enter or quit alarm
setting menu.
Increase Bass/Treble level by 1 step.
In setting menu, change the In radio setting menu, change the current
current time/alarm parameter by parameter by one unit per each press.
one unit per each press.
In radio working mode, increase volume 1
step per each press.
In setting menu, change the
current time/alarm parameter
automatically.
In radio setting menu, change the current
parameter automatically.
In radio working mode, increase volume
level automatically until at maximum.
In setting menu, change the In radio setting menu, change the current
current time/alarm parameter by parameter by one unit per each press.
one unit per each press.
In radio working mode, decrease volume 1
step per each press.
In setting menu, change the
current time/alarm parameter
automatically.
In radio setting menu, change the current
parameter automatically.
In radio working mode, decrease volume
level automatically until at minimum.
None
FM/SW mode: Change band range between
wideband and narrow-band.
None
FM mode: Change between forced mono
audio and ST audio
None
In radio setting menu, change the current
item by one step per each press
None
Quickly return to FM working mode.
Rev. 0.1
7