SI4731-DEMO Datasheet, PDF (1/14 Pages) Silicon Laboratories – Si4731 DEMO BOARD USERS GUIDE

Si4731-DEMO
Si4731 DEMO BOARD USER’S GUIDE
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 Silicon Laboratories Si4731-DEMO board provides a complete portable AM/FM radio design with numerous
enhanced features that demonstrate the capabilities of the Silicon Laboratories 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 Silicon Labs
Si47xx radio family of FM receivers, transmitters, and transceivers. The host MCU is a Silicon Laboratories
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.
Rev. 0.1 5/08
Copyright © 2016 by Silicon Laboratories
Si4731-DEMO