Si4844-B-DEMO Silicon Labs

Si4844-B-DEMO Si4844-B DEMO BOARD USERS GUIDE 1. Features ATDD (analog tune and digital display) FM/AM/SW radio Worldwide FM band support from 64 to 109 MHz with 5 default sub-bands: FM1 87108 MHz (Demo Board Default) FM2 86.5109 MHz FM3 87.3 108.25 MHz FM4 76 90 MHz FM5 6487 MHz (Demo Board Default) Worldwide AM band support from 504 kHz to 1750 kHz with 5 default sub-bands: AM1 5201710 kHz (Demo Board Default) AM2 5221620 kHz (Demo Board Default) AM3 5041665 kHz AM4 5201730 kHz AM5 510 1750 kHz Worldwide SW band support from 2.3 to 22 MHz with 16 default sub-bands: SW1 5.66.4 MHz (DEMO Board Default) SW2 5.956.2 MHz SW3 6.87.6 MHz (DEMO Board Default) SW4 7.17.6 MHz SW5 9.2 10 MHz (DEMO Board Default) SW6 9.29.9 MHz SW7 11.45 12.25 MHz (DEMO Board Default) SW8 11.612.2 MHz SW9 13.414.2 MHz (DEMO Board Default) SW10 13.57 - 13.87 MHz SW11 1515.9 MHz (DEMO Board Default) SW12 15.115.8 MHz SW13 17.118 MHz (DEMO Board Default) SW14 17.4817.9 MHz SW15 21.222 MHz (DEMO Board Default) SW16 21.4521.85 MHz Supports wider FM/SW band range Twelve positions slide switch or one push button for selecting different bands according to the target application Two AAA battery operations with working voltage down to 2.0 V Economical potentiometer for frequency tuning replaces more expensive variable capacitor (PVC) Potentiometer and/or push button volume control FM 50 s or 75 s (default) de-emphasis 9-level Bass/Treble via push button control for FM 7-level Bass/Treble via push button control for AM/ SW FM/AM/SW band indicator and frequency display in LCD 24 matrix keypad The frequency range of each band, de-emphasis, and AM channel space can be re-configured by host MCU. Rev. 0.1 5/13 Copyright 2016 by Silicon Laboratories Si4844-B-DEMOSi4844-B-DEMO 2. Overview This manual describes the operation of the Silicon Labs Si4844 DEMO board Rev1.4, Mar 12, 2013. The Silicon Laboratories Si4844-DEMO board is designed with the 24-pin SSOP packaged Si4844-B chip, the revolutionary single chip AM/FM/SW receiver that integrates everything from antenna input to audio output and allows use of common and economical potentiometers to do the frequency tuning. It provides a complete portable analog tune digital display AM/FM/SW radio design. The LCD displays the tuning information. The Si4844-DEMO is designed with 1-layer PCB, allowing the lowest cost without sacrificing the RF performance. The demo board works with two AAA batteries and working voltage down to 2.0 V. 3. Description Figure 1 and Figure 2 shows the physical layout of the board with key components indicated. Figure 1. Si4844-DEMO Board Top Side in Time Mode 2 Rev. 0.1