Si4844-DEMO Silicon Labs, Si4844-DEMO Datasheet - Page 6

• Manufacturer Part Number: Si4844-DEMO
• Description: RF Development Tools Si4844 Demo and Eval Board
• Manufacturer: Silicon Labs
• Type: Tunersr

Specifications of Si4844-DEMO

• Product: Demonstration Boards
• Tool Is For Evaluation Of: Si4844
• Frequency: 520 kHz to 108 MHz
• Operating Supply Voltage: 2 V
• Description/function: AM/FM/SW receiver

Si4840/44-DEMO
Human Interface:
There are 8 keys for controlling the demo board as shown below.
Each key can have a different function under each operating condition:


6
POWER/BAND
DOWN/VOL-
Time mode: Radio function is disabled. LCD displays time. Buttons can be used to set time, alarm, etc.
FM/AM/SW Radio mode: Tuner IC works in power up mode. Radio function is enabled. LCD displays the radio
station parameters. Buttons are used to adjust radio settings.The functions of the buttons are summarized in
Table 1. The FM/AM/SW radio parameters which can be configured are listed in Table 2.
UP/VOL+
TREBLE/AL
BASS/TMR
DE/SPC
Button
Hold Time < 1s
Hold Time > 1s
Hold Time < 1s
Hold Time > 1s
Hold Time < 1s
TREBLE/AL
SETTING
parameter by one unit per
parameter by one unit per
parameter automatically.
quit alarm setting menu.
In setting menu, change
In setting menu, change
In setting menu, change
alarm function; enter or
Table 1. Key Function Description
the current time/alarm
the current time/alarm
the current time/alarm
Enable or disable the
Enter or quit setting
Enable radio
Time Mode
each press.
each press.
Tuner Off
BASS/TMR
MONO/ST
menu.
None
None
Rev 0.1
DOWN/VOL-
FM mode: Change De-emphasis, between 50 and
75 us.
AM mode: Change channel space, between 9 kHz
and 10 kHz.
In radio setting menu, change the current parameter
In radio setting menu, change the current parameter
In radio setting menu, change the current parameter
Change between FM, AM, and SW (there are 1 FM
In radio working mode, increase volume level auto-
by one unit per each press. In radio working mode,
by one unit per each press. In radio working mode,
DE/SPC
Disable radio function and enter Time mode.
(Radio parameters will be saved to MCU.)
decrease volume 1 step per each press.
increase volume 1 step per each press.
Decrease Bass/Treble level by 1 step.
Increase Bass/Treble level by 1 step.
band, 1 AM band and 8 SW bands)
matically until to maximum.
FM/AM/SW Radio Mode
POWER/BAND
UP/VOL+
automatically.
Tuner On