概述

　　DAB接收芯片通常都采用SPI 接口进行通讯和控制，为了兼容传统的模拟 FM/AM收音模块收音主板可提供的通讯控制接口总线，本方案提供一种通过UART命令控制方式来操作的模块设计，基础的DAB控制操作都由模块内置MCU 来完成，应用MCU 与模块 MCU通过 UART命令完成 DAB的各种操作。

　　器件优势

　　· DAB/FM/AM收音芯片(Si4632/Si4684)，集成了RF TUNER和DEMOD，减少了两个芯片的干扰风险，降低了设计的复杂度。且功耗低，无需考虑散热，适用于低成本后装市场产品，其软件SDK包支持，可快速开发上市。

     【Si463x：Si4632/Si468】

带 RDS 的 Si463x 单芯片 AM/FM/HD/DAB/DAB+ 数字收音机接收器

Si463x 单芯片数字数据接收器是 Silicon Labs 推出的 100% CMOS 数字收音机广播接收器 IC 系列。Si463x 系列在尺寸、功耗与性能方面取得革命性的改进，实现了高容量、成本敏感型多媒体产品的数字广播功能。该系列提供了集所有功能于一身、超低功耗、多频段数字广播接收器以支持全球模拟和数字收音机标准，包括 AM、SW、LW、FM、FM RDS、HD、DAB、DAB+ 和 DMB。该 Si463x 数字收音机接收器是市面上最具成本效益的单芯片数字收音机接收器，支持世界各地的收音机接收，且经过针对汽车售后市场的 AM/FM HD Radio 认证。

特点

全球 FM 波段支持 (76–108 MHz)

全球 AM 波段支持 (520–1710 kHz)

长波波段支持 (144–288 kHz)

短波波段支持 (2.3–30 MHz)

DAB、DAB+ Band III 支持 (168–240 MHz)

先进的 RDS/RBDS 解码引擎

支持 AM/FM HD Radio™

集成的 HD 混合

OFDM 信道解调器

对多达 4 个服务组件进行同时解码

无缝动态多路复用重构

集成 SRAM 支持时间和频率的去交织

先进的搜索功能

先进的音频 DSP 处理

【Si463x-A10】

Single-Chip, AM/FM/HD/DAB/DAB+ Radio Receiver Family

The Si463x single-chip digital receiver is a family of 100% CMOS digital radio broadcast receiver ICs from Silicon Labs. The Si463x family offers a complete and cost-effective digital radio solution integrating the RF tuner, baseband, and audio processing on a single die. The high level of integration provides significant customer benefits compared to traditional digital radio solutions, including a reduction in system implementation complexity, validation and testing, and improved reliability and manufacturability. The Si463x is compatible with the iBiquity Digital and NRSC-5 standards for In-Band-On-Channel (IBOC) digital radio broadcasting, integrating digital channel demodulation and decoding functions, along with audio decoding and IBOC analog-digital blend. The Si463x supports IBOC multicasting, as well as the full range of HD Radio data services, such as PSD, Artist Experience, iTunes® Tagging, Bookmark and real-time Traffic, with the appropriate external decoders.

The Si463x also offers VHF Band III (168-240 MHz) reception capability and is fully compliant with ETSI EN 300 401 and ETSI TS 102 563. The Si463x delivers DAB and DAB+ via an integrated source decoder that supports both MPEG Audio Layer 2 (DAB) and HEAAC V2 (DAB+). The Si463x supports data services such as Dynamic Labels, Intellitext, Electronic Program Guide (EPG), Slideshow, and Journaline® with the appropriate external decoders.

For more information, visit the Si463x Digital Radio Receivers web page.

Features

• Worldwide FM band support (76-108 MHz)

• Worldwide AM band support (520-1710 kHz)

• LW band support (144-288 kHz)

• SW band support (2.3-30 MHz)

• Advanced RDS/RBDS decoder

• FM HD Radio™ support with on-chip IBOC blend

• DAB, DAB+ Band III support (168-240 MHz)

• Integrated OFDM channel demodulator

• Integrated de-interleaving SRAM

• I2S digital audio out with ASRC

• Integrated 97 dB stereo audio DAC

• Concurrent I2S /L-R stereo audio out

• Full range of signal quality metrics

• Fully-integrated VCO /PLL /synthesizer

• SPI and I2C host control interfaces

• QFN 48-pin, 7x7x0.85 mm

Applications

• Aftermarket car audio systems

　　· 8位MCU(EFM8UB20F64) ，稳定可靠，其SDK包的开发平台已有UART串口命令，从模式DEMO CODE，支持快速完成UART接口软件开发。

元件供应

型号：EFM8UB20F64G-B-QFP48                 品牌：SILICON LABS

【EFM8UB20】

EFM8UB属于Universal Bee系列MCU，为业界集成度最高、带USB接口的混合信号8位微控制器。EFM8UB2搭载高精度振荡器、时钟恢复电路以及集成收发器，不需要任何外部元件即可用于所有全速USB应用。

产品特色

流水线式8位8051 MCU内核，最大工作频率达48 MHz

兼容无晶振全速/低速USB 2.0的控制器，具有1kB缓冲区

一个单端差分10位ADC和两个模拟比较器

内部48MHz振荡器支持无晶振USB和UART操作，在使用USB时钟恢复时精度为±0.25%

2个UART、1个SPI、2个SMBus/I2C串行通信接口

EFM8UB20框图

EFM8 Universal Bee Family EFM8UB2 Data Sheet

The EFM8UB2, part of the Universal Bee family of MCUs, is a multi-purpose line of 8-bit microcontrollers with USB feature set.

These devices offer high value by integrating a USB peripheral interface with a high precision oscillator, clock recovery circuit, and integrated transceiver, making them ideal for any full speed USB applications with no external components required. With an efficient 8051 core and precision analog, the EFM8UB2 family is also optimal for embedded applications.

EFM8UB2 applications include the following:

• USB I/O controls, dongles

• High-speed communication bridge

• Consumer electronics

• Medical equipment

KEY FEATURES

• Pipelined 8-bit 8051 MCU Core with 48 MHz maximum operating frequency

• Up to 40 multifunction I/O pins

• Crystal-less full speed/low speed USB 2.0 compliant controller with 1 KB buffer memory

• One differential 10-bit ADC and two analog comparators

• Internal 48 MHz oscillator with ±0.25% accuracy with USB clock recovery supports crystal-free USB and UART operation

• 2 UARTs, SPI, 2 SMBus/I2C serial communications

Feature List

The EFM8UB2 highlighted features are listed below.

• Core:

• Pipelined CIP-51 Core

• Fully compatible with standard 8051 instruction set

• 70% of instructions execute in 1-2 clock cycles

• 48 MHz maximum operating frequency

• Memory:

• Up to 64 KB flash memory, in-system re-programmable from firmware.

• Up to 4352 bytes RAM (including 256 bytes standard 8051 RAM and 4096 bytes on-chip XRAM)

• Power:

• Internal LDO regulator for CPU core voltage

• Internal 5-to-3.3 V LDO allows direct connection to USB supply net

• Power-on reset circuit and brownout detectors

• I/O: Up to 40 total multifunction I/O pins:

• Flexible peripheral crossbar for peripheral routing

• 10 mA source, 25 mA sink allows direct drive of LEDs

• Clock Sources:

• Internal 48 MHz precision oscillator ( ±1.5% accuracy without USB clock recovery, ±0.25% accuracy with USB clock recovery)

• Internal 80 kHz low-frequency oscillator

• External crystal, RC, C, and CMOS clock options

• Timers/Counters and PWM:

• 5-channel Programmable Counter Array (PCA) supporting PWM, capture/compare, and frequency output modes with watchdog timer function

• 6 x 16-bit general-purpose timers

• Communications and Digital Peripherals:

• Universal Serial Bus (USB) Function Controller with eight

flexible endpoint pipes, integrated transceiver, and 1 KB

FIFO RAM

• 2 x UART

• SPI™ Master / Slave

• 2 x SMBus™/I2C™ Master / Slave

• External Memory Interface (EMIF)

• Analog:

• 10-Bit Analog-to-Digital Converter (ADC0)

• 2 x Low-current analog comparators

• On-Chip, Non-Intrusive Debugging

• Full memory and register inspection

• Four hardware breakpoints, single-stepping

• Pre-loaded USB bootloader

• Temperature range -40 to 85 ºC

• Single power supply 2.65 to 3.6 V

• QFP48, QFP32, and QFN32 packages

With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the EFM8UB2 devices are truly standalone system-on-a-chip solutions. The flash memory is reprogrammable in-circuit, providing non-volatile data storage and allowing field upgrades of the firmware. The on-chip debugging interface (C2) allows non-intrusive (uses no on-chip resources), full speed, in-circuit debugging using the production MCU installed in the final application. This debug logic supports inspection and modification of memory and registers, setting breakpoints, single stepping, and run and halt commands. All analog and digital peripherals are fully functional while debugging. Each device is specified for 2.65 to 3.6 V operation and is available in 32-pin QFN, 32-pin QFP, or 48-pin QFP packages. All package options are lead-free and RoHS compliant.

       【Eton】

　　Eton是一家收音机制造商。该公司生产大量收音机。他们提供普通AM/FM收音机和短波收音机，还提供高清晰度卫星收音机和数字广播 (DAB) 收音机。他们还制造带手摇发电机的应急收音机，这些收音机在发生“世界末日”攻击(zombie attact)时非常有用。

　　这款是Eton E1-XM 收音机。

　　Eton E1-XM收音机由美国Eton公司设计、在印度装组的收音机，是世界上第一台能接收卫星广播又能接收传统的LW/MW/SW/FM收音机。 自从德国根德公司在1996年把Satellit 700停产之后，一直有计划出一款新型收音机，并命名为Satellit 900，但Satellit 900到最后也没有正式面世。 一直到了2005年7月底，头一批约500台的“S900”机子终于在美国面世，不过并没有冠上根德Satellit 900的名称，而是改为美国Eton公司的E1-XM的型号面世。E1-XM改为由美国Eton公司设计、在印度装组，并加上了能准备接收美国XM卫星广播电台这一新功能。

　　价格在650美元。国内没有卖的。

　　频率范围--

　　调幅: 100 KHz. – 30 MHz.

　　调频: 76 – 108 MHz.

　　电源：使用随机的电源匹配器，或7V.至14V.外来直流电源，或四枚大号池;

　　尺寸： 335 x 180 x 67 (连旋钮) / 13.1 x 7.1 x 2.3 吋;

　　重量：约1.9公斤 / 4.2 磅(不含电池)

　　优点/特色：

　　1. E1-XM是世界上第一台能接收卫星广播又能接收传统的LW/MW/SW/FM收音机;

　　2. 机子的面板设计好看，有着很强烈的现代风格;

　　3. 机身拿上手时，有着摸橡胶的感觉;

　　4. 这机是Assembled in India在印度装配的，印度有收音机工厂，相信很多人都不知道;为什幺写上Assembled in India在印度装配呢?应该说是大部份配件及主机都在当地制造，才能写上MADE IN xxx，否则只能写上ASSEMBLED IN xxx，即在当地装配了。还有，据说这机的软件不在印度录上，而是运回到美国才烧录，原因可能是避免泄密的说!