Skyworks Si4731-DEMO, Руководство пользователя

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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
Si4731-DEMO
Si4731 D
EM O
B
O A R D
U
S ER
’
S
G
U I DE
1. Features

Worldwide FM band support, 76–108 MHz

Worldwide AM band support, 520–1710 kHz
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Auto seek/auto scan
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48 FM and 48 AM station presets
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FM Radio Data Services (RDS) decoding (Pi Pty Ps RT CT AF displays)
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Automatic set time/date function via RDS
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Automatic Alternative Frequency (AF) switching
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Automatic AM channel spacing detection
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Single battery operation down to 0.9 V or three battery operation

Adjustable parameters include
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Tuning spacing
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Seek SNR/RSSI thresholds
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Soft mute SNR/RSSI thresholds
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Channel filters
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Stereo and mono blend thresholds
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Band limits
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De-emphasis (50 or 75 µs)

AM channel spacing detection threshold
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Stereo/mono indicator
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Volume control with mute function
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AM/FM band and signal quality indicator display
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Battery voltage indicator
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Calendar display
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3x4 matrix keypad interface
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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.