Skyworks Si4731-DEMO User Manual

S i 4 7 3 1 D
E M O
1. Features
Worldwide FM band support, 76–108 MHz

Worldwide AM band support, 520–1710 kHz

Auto seek/auto scan

48 FM and 48 AM station presets

FM Radio Data Services (RDS) decoding (Pi Pty Ps RT CT AF displays)

Automatic set time/date function via RDS

Automatic Alternative Frequency (AF) switching

Automatic AM channel spacing detection

Single battery operation down to 0.9 V or three battery operation

Adjustable parameters include

Tuning spacing

Seek SNR/RSSI thresholds

Soft mute SNR/RSSI thresholds

Channel filters

Stereo and mono blend thresholds

Band limits

De-emphasis (50 or 75 µs)

AM channel spacing detection threshold

Stereo/mono indicator

Volume control with mute function

AM/FM band and signal quality indicator display

Battery voltage indicator

Calendar display

3x4 matrix keypad interface

Direct input of station frequencies

2. Overview
The Skyworks Solutions Si4731-DEMO board provides a complete portable AM/FM radio design with numerous
enhanced features that demonstrate the capabilities of the Skyworks Solutions AM/FM and MCU product families.
The Si4731-DEMO comes in a 3x3 mm 20-pin QFN package and is layout compatible with the entire Skyworks
Solutions Si47xx radio family of FM receivers, transmitters, and transceivers. The host MCU is a Skyworks
Solutions C8051F930 with internal oscillator and built-in DC-DC converter. A 79 x 101 dot matrix LCD provides the
flexibility to display a variety of system information including RDS. The demo board can work with either one AA
battery using the dc-dc converter of the C8051F930 MCU or three AAA batteries.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
Rev. 0.1 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • October 4, 2021
B U
O A R D S E R
S i 4 7 3 1 - D E M O
' G
S U I D E